Merge remote-tracking branch 'upstream/beta' into more-tests

.dependency-cruiser.cjs

@@ -4,7 +4,7 @@ module.exports = {
     {
       name: "only-type-imports",
       severity: "error",
-      comment: "Files in enums and @types may only use type imports.",
+      comment: "Files in 'enums/' and '@types/' must only use type imports.",
       from: {
         path: ["(^|/)src/@types", "(^|/)src/enums"],
       },
@@ -14,7 +14,7 @@ module.exports = {
     },
     {
       name: "no-circular-at-runtime",
-      severity: "warn",
+      severity: "error",
       comment:
         "This dependency is part of a circular relationship. You might want to revise " +
         "your solution (i.e. use dependency inversion, make sure the modules have a single responsibility) ",
@@ -34,7 +34,7 @@ module.exports = {
         "add an exception for it in your dependency-cruiser configuration. By default " +
         "this rule does not scrutinize dot-files (e.g. .eslintrc.js), TypeScript declaration " +
         "files (.d.ts), tsconfig.json and some of the babel and webpack configs.",
-      severity: "warn",
+      severity: "error",
       from: {
         orphan: true,
         pathNot: [
@@ -42,8 +42,7 @@ module.exports = {
           "[.]d[.]ts$", // TypeScript declaration files
           "(^|/)tsconfig[.]json$", // TypeScript config
           "(^|/)(?:babel|webpack)[.]config[.](?:js|cjs|mjs|ts|cts|mts|json)$", // other configs
-          // anything in src/@types
-          "(^|/)src/@types/",
+          "(^|/)test/.+[.]setup[.]ts", // Vitest setup files
         ],
       },
       to: {},
@@ -53,7 +52,7 @@ module.exports = {
       comment:
         "A module depends on a node core module that has been deprecated. Find an alternative - these are " +
         "bound to exist - node doesn't deprecate lightly.",
-      severity: "warn",
+      severity: "error",
       from: {},
       to: {
         dependencyTypes: ["core"],
@@ -86,7 +85,7 @@ module.exports = {
       comment:
         "This module uses a (version of an) npm module that has been deprecated. Either upgrade to a later " +
         "version of that module, or find an alternative. Deprecated modules are a security risk.",
-      severity: "warn",
+      severity: "error",
       from: {},
       to: {
         dependencyTypes: ["deprecated"],
@@ -122,7 +121,7 @@ module.exports = {
         "Likely this module depends on an external ('npm') package that occurs more than once " +
         "in your package.json i.e. bot as a devDependencies and in dependencies. This will cause " +
         "maintenance problems later on.",
-      severity: "warn",
+      severity: "error",
       from: {},
       to: {
         moreThanOneDependencyType: true,
@@ -133,7 +132,7 @@ module.exports = {
       },
     },
 
-    /* rules you might want to tweak for your specific situation: */
+    // rules you might want to tweak for your specific situation:
 
     {
       name: "not-to-spec",
@@ -188,7 +187,7 @@ module.exports = {
         "in your package.json. This makes sense if your package is e.g. a plugin, but in " +
         "other cases - maybe not so much. If the use of a peer dependency is intentional " +
         "add an exception to your dependency-cruiser configuration.",
-      severity: "warn",
+      severity: "error",
       from: {},
       to: {
         dependencyTypes: ["npm-peer"],
@@ -196,6 +195,7 @@ module.exports = {
     },
   ],
   options: {
+    exclude: ["src/plugins/vite/*", "src/vite.env.d.ts"],
     /* Which modules not to follow further when encountered */
     doNotFollow: {
       /* path: an array of regular expressions in strings to match against */
@@ -235,7 +235,7 @@ module.exports = {
        true: also detect dependencies that only exist before typescript-to-javascript compilation
        "specify": for each dependency identify whether it only exists before compilation or also after
      */
-    // tsPreCompilationDeps: false,
+    tsPreCompilationDeps: true,
 
     /* list of extensions to scan that aren't javascript or compile-to-javascript.
        Empty by default. Only put extensions in here that you want to take into

.env.development

@@ -1,6 +1,7 @@
 VITE_BYPASS_LOGIN=1
 VITE_BYPASS_TUTORIAL=0
 VITE_SERVER_URL=http://localhost:8001
+# IDs for discord/google auth go unused due to VITE_BYPASS_LOGIN
 VITE_DISCORD_CLIENT_ID=1234567890
 VITE_GOOGLE_CLIENT_ID=1234567890
 VITE_I18N_DEBUG=0

.github/pull_request_template.md

@@ -14,13 +14,16 @@ Make sure the title includes categorization (choose the one that best fits):
 -  [Balance]: If the PR is related to game balance
 -  [Challenge]: If the PR is adding or modifying challenges
 -  [Refactor]: If the PR is primarily rewriting existing code
--      [Docs]: If the PR is just adding or modifying documentation (such as tsdocs/code comments)
+-  [Dev]: If the PR is primarily changing something pertaining to development (lefthook hooks, linter rules, etc.)
+-  [i18n]: If the PR is primarily adding/changing locale keys or key usage (may come with an associated locales PR)
+-  [Docs]: If the PR is adding or modifying documentation (such as tsdocs/code comments)
 -  [GitHub]: For changes to GitHub workflows/templates/etc
 -  [Misc]: If no other category fits the PR
 -->
+
 <!--
 Make sure that this PR is not overlapping with someone else's work
-Please try to keep the PR self-contained (and small)
+Please try to keep the PR self-contained (and small!)
 -->
 
 ## What are the changes the user will see?
@@ -66,7 +69,7 @@ Do the reviewers need to do something special in order to test your changes?
 - [ ] Have I provided a clear explanation of the changes?
 - [ ] Have I tested the changes manually?
 - [ ] Are all unit tests still passing? (`npm run test:silent`)
-  - [ ] Have I created new automated tests (`npm run create-test`) or updated existing tests related to the PR's changes?
+  - [ ] Have I created new automated tests (`npm run test:create`) or updated existing tests related to the PR's changes?
 - [ ] Have I provided screenshots/videos of the changes (if applicable)?
   - [ ] Have I made sure that any UI change works for both UI themes (default and legacy)?
 

.github/workflows/linting.yml

@@ -0,0 +1,42 @@
+name: Linting
+
+on:
+  push:
+    branches:
+      - main
+      - beta
+  pull_request:
+    branches:
+      - main
+      - beta
+  merge_group:
+    types: [checks_requested]
+
+jobs:
+  run-linters:
+    name: Run linters
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v4
+        with:
+          submodules: 'recursive'
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'npm'
+
+      - name: Install Node.js dependencies
+        run: npm ci
+      
+      - name: Run ESLint
+        run: npm run eslint-ci
+
+      - name: Lint with Biome
+        run: npm run biome-ci
+
+      - name: Check dependencies with depcruise
+        run: npm run depcruise

.github/workflows/quality.yml

@@ -1,41 +0,0 @@
-name: Biome Code Quality
-
-on:
-  # Trigger the workflow on push or pull request,
-  # but only for the main branch
-  push:
-    branches:
-      - main  # Trigger on push events to the main branch
-      - beta # Trigger on push events to the beta branch
-  pull_request:
-    branches:
-      - main  # Trigger on pull request events targeting the main branch
-      - beta # Trigger on pull request events targeting the beta branch
-  merge_group:
-    types: [checks_requested]
-
-jobs:
-  run-linters:  # Define a job named "run-linters"
-    name: Run linters  # Human-readable name for the job
-    runs-on: ubuntu-latest  # Specify the latest Ubuntu runner for the job
-
-    steps:
-      - name: Check out Git repository  # Step to check out the repository
-        uses: actions/checkout@v4  # Use the checkout action version 4
-        with:
-          submodules: 'recursive'
-
-      - name: Set up Node.js  # Step to set up Node.js environment
-        uses: actions/setup-node@v4  # Use the setup-node action version 4
-        with:
-          node-version-file: '.nvmrc'
-          cache: 'npm'
-
-      - name: Install Node.js dependencies  # Step to install Node.js dependencies
-        run: npm ci  # Use 'npm ci' to install dependencies
-      
-      - name: eslint  # Step to run linters
-        run: npm run eslint-ci
-
-      - name: Lint with Biome  # Step to run linters
-        run: npm run biome-ci

biome.jsonc

@@ -28,7 +28,6 @@
       ".vscode/*",
       "*.css", // TODO?
       "*.html", // TODO?
-      "src/overrides.ts",
       // TODO: these files are too big and complex, ignore them until their respective refactors
       "src/data/moves/move.ts",
 
@@ -47,8 +46,8 @@
       "correctness": {
         "noUndeclaredVariables": "off",
         "noUnusedVariables": "error",
-        "noSwitchDeclarations": "warn", // TODO: refactor and make this an error
-        "noVoidTypeReturn": "warn", // TODO: Refactor and make this an error
+        "noSwitchDeclarations": "error",
+        "noVoidTypeReturn": "error",
         "noUnusedImports": "error"
       },
       "style": {
@@ -85,7 +84,7 @@
         "useLiteralKeys": "off",
         "noForEach": "off", // Foreach vs for of is not that simple.
         "noUselessSwitchCase": "off", // Explicit > Implicit
-        "noUselessConstructor": "warn", // TODO: Refactor and make this an error
+        "noUselessConstructor": "error",
         "noBannedTypes": "warn" // TODO: Refactor and make this an error
       },
       "nursery": {
@@ -120,6 +119,28 @@
           }
         }
       }
+    },
+
+    // Overrides to prevent unused import removal inside `overrides.ts` and enums files (for TSDoc linkcodes)
+    {
+      "include": ["src/overrides.ts", "src/enums/*"],
+      "linter": {
+        "rules": {
+          "correctness": {
+            "noUnusedImports": "off"
+          }
+        }
+      }
+    },
+    {
+      "include": ["src/overrides.ts"],
+      "linter": {
+        "rules": {
+          "style": {
+            "useImportType": "off"
+          }
+        }
+      }
     }
   ]
 }

package.json

@@ -18,9 +18,9 @@
     "eslint": "eslint --fix .",
     "eslint-ci": "eslint .",
     "biome": "biome check --write --changed --no-errors-on-unmatched",
-    "biome-ci": "biome ci --diagnostic-level=error --reporter=github --changed --no-errors-on-unmatched",
+    "biome-ci": "biome ci --diagnostic-level=error --reporter=github --no-errors-on-unmatched",
     "docs": "typedoc",
-    "depcruise": "depcruise src",
+    "depcruise": "depcruise src test",
     "depcruise:graph": "depcruise src --output-type dot | node dependency-graph.js > dependency-graph.svg",
     "postinstall": "npx lefthook install && npx lefthook run post-merge",
     "update-version:patch": "npm version patch --force --no-git-tag-version",

public/locales

@@ -1 +1 @@
-Subproject commit 4dab23d6a78b6cf32db43c9953e3c2000f448007
+Subproject commit fade123e20ff951e199d7c0466686fe8c5511643

scripts/create-test/create-test.js

@@ -48,7 +48,7 @@ async function promptTestType() {
     {
       type: "list",
       name: "selectedOption",
-      message: "What type of test would you like to create:",
+      message: "What type of test would you like to create?",
       choices: [...choices.map(choice => ({ name: choice.label, value: choice })), "EXIT"],
     },
   ]);

scripts/create-test/test-boilerplate.ts

@@ -24,7 +24,7 @@ describe("{{description}}", () => {
     game.override
       .ability(AbilityId.BALL_FETCH)
       .battleStyle("single")
-      .disableCrits()
+      .criticalHits(false)
       .enemySpecies(SpeciesId.MAGIKARP)
       .enemyAbility(AbilityId.BALL_FETCH)
       .enemyMoveset(MoveId.SPLASH)

src/@types/ability-types.ts

@@ -1,11 +1,27 @@
-import type { AbAttr } from "#app/data/abilities/ab-attrs/ab-attr";
+import type { AbAttr } from "#app/data/abilities/ability";
 import type Move from "#app/data/moves/move";
 import type Pokemon from "#app/field/pokemon";
 import type { BattleStat } from "#enums/stat";
+import type { AbAttrConstructorMap } from "#app/data/abilities/ability";
 
-export type AbAttrApplyFunc<TAttr extends AbAttr> = (attr: TAttr, passive: boolean) => void;
-export type AbAttrSuccessFunc<TAttr extends AbAttr> = (attr: TAttr, passive: boolean) => boolean;
+// Intentionally re-export all types from the ability attributes module
+export type * from "#app/data/abilities/ability";
+
+export type AbAttrApplyFunc<TAttr extends AbAttr> = (attr: TAttr, passive: boolean, ...args: any[]) => void;
+export type AbAttrSuccessFunc<TAttr extends AbAttr> = (attr: TAttr, passive: boolean, ...args: any[]) => boolean;
 export type AbAttrCondition = (pokemon: Pokemon) => boolean;
 export type PokemonAttackCondition = (user: Pokemon | null, target: Pokemon | null, move: Move) => boolean;
 export type PokemonDefendCondition = (target: Pokemon, user: Pokemon, move: Move) => boolean;
 export type PokemonStatStageChangeCondition = (target: Pokemon, statsChanged: BattleStat[], stages: number) => boolean;
+
+/**
+ * Union type of all ability attribute class names as strings
+ */
+export type AbAttrString = keyof AbAttrConstructorMap;
+
+/**
+ * Map of ability attribute class names to an instance of the class.
+ */
+export type AbAttrMap = {
+  [K in keyof AbAttrConstructorMap]: InstanceType<AbAttrConstructorMap[K]>;
+};

src/@types/modifier-types.ts

@@ -0,0 +1,32 @@
+/**
+ * Re-exports of all the types defined in the modifier module.
+ */
+
+import type Pokemon from "#app/field/pokemon";
+import type { ModifierConstructorMap } from "#app/modifier/modifier";
+import type { ModifierType, WeightedModifierType } from "#app/modifier/modifier-type";
+export type ModifierTypeFunc = () => ModifierType;
+export type WeightedModifierTypeWeightFunc = (party: Pokemon[], rerollCount?: number) => number;
+
+export type { ModifierConstructorMap } from "#app/modifier/modifier";
+
+/**
+ * Map of modifier names to their respective instance types
+ */
+export type ModifierInstanceMap = {
+  [K in keyof ModifierConstructorMap]: InstanceType<ModifierConstructorMap[K]>;
+};
+
+/**
+ * Union type of all modifier constructors.
+ */
+export type ModifierClass = ModifierConstructorMap[keyof ModifierConstructorMap];
+
+/**
+ * Union type of all modifier names as strings.
+ */
+export type ModifierString = keyof ModifierConstructorMap;
+
+export type ModifierPool = {
+  [tier: string]: WeightedModifierType[];
+};

src/battle-scene.ts

@@ -4,7 +4,8 @@ import type Pokemon from "#app/field/pokemon";
 import { EnemyPokemon, PlayerPokemon } from "#app/field/pokemon";
 import type { PokemonSpeciesFilter } from "#app/data/pokemon-species";
 import type PokemonSpecies from "#app/data/pokemon-species";
-import { allSpecies, getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
+import { allSpecies } from "#app/data/data-lists";
 import {
   fixedInt,
   getIvsFromId,
@@ -58,23 +59,15 @@ import {
   getEnemyModifierTypesForWave,
   getLuckString,
   getLuckTextTint,
-  getModifierPoolForType,
-  getModifierType,
   getPartyLuckValue,
-  ModifierPoolType,
-  modifierTypes,
   PokemonHeldItemModifierType,
 } from "#app/modifier/modifier-type";
+import { getModifierType } from "./utils/modifier-utils";
+import { modifierTypes } from "./data/data-lists";
+import { getModifierPoolForType } from "./utils/modifier-utils";
+import { ModifierPoolType } from "#enums/modifier-pool-type";
 import AbilityBar from "#app/ui/ability-bar";
-import {
-  applyAbAttrs,
-  applyPostBattleInitAbAttrs,
-  applyPostItemLostAbAttrs,
-  BlockItemTheftAbAttr,
-  DoubleBattleChanceAbAttr,
-  PostBattleInitAbAttr,
-  PostItemLostAbAttr,
-} from "#app/data/abilities/ability";
+import { applyAbAttrs, applyPostBattleInitAbAttrs, applyPostItemLostAbAttrs } from "./data/abilities/apply-ab-attrs";
 import { allAbilities } from "./data/data-lists";
 import type { FixedBattleConfig } from "#app/battle";
 import Battle from "#app/battle";
@@ -145,14 +138,13 @@ import { LoadingScene } from "#app/loading-scene";
 import type { MovePhase } from "#app/phases/move-phase";
 import { ShopCursorTarget } from "#app/enums/shop-cursor-target";
 import MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";
+import { allMysteryEncounters, mysteryEncountersByBiome } from "#app/data/mystery-encounters/mystery-encounters";
 import {
-  allMysteryEncounters,
   ANTI_VARIANCE_WEIGHT_MODIFIER,
   AVERAGE_ENCOUNTERS_PER_RUN_TARGET,
   BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT,
   MYSTERY_ENCOUNTER_SPAWN_MAX_WEIGHT,
-  mysteryEncountersByBiome,
-} from "#app/data/mystery-encounters/mystery-encounters";
+} from "./constants";
 import { MysteryEncounterSaveData } from "#app/data/mystery-encounters/mystery-encounter-save-data";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
@@ -1264,7 +1256,7 @@ export default class BattleScene extends SceneBase {
     const doubleChance = new NumberHolder(newWaveIndex % 10 === 0 ? 32 : 8);
     this.applyModifiers(DoubleBattleChanceBoosterModifier, true, doubleChance);
     for (const p of playerField) {
-      applyAbAttrs(DoubleBattleChanceAbAttr, p, null, false, doubleChance);
+      applyAbAttrs("DoubleBattleChanceAbAttr", p, null, false, doubleChance);
     }
     return Math.max(doubleChance.value, 1);
   }
@@ -1469,7 +1461,7 @@ export default class BattleScene extends SceneBase {
         for (const pokemon of this.getPlayerParty()) {
           pokemon.resetBattleAndWaveData();
           pokemon.resetTera();
-          applyPostBattleInitAbAttrs(PostBattleInitAbAttr, pokemon);
+          applyPostBattleInitAbAttrs("PostBattleInitAbAttr", pokemon);
           if (
             pokemon.hasSpecies(SpeciesId.TERAPAGOS) ||
             (this.gameMode.isClassic && this.currentBattle.waveIndex > 180 && this.currentBattle.waveIndex <= 190)
@@ -1644,6 +1636,9 @@ export default class BattleScene extends SceneBase {
       case SpeciesId.TATSUGIRI:
       case SpeciesId.PALDEA_TAUROS:
         return randSeedInt(species.forms.length);
+      case SpeciesId.MAUSHOLD:
+      case SpeciesId.DUDUNSPARCE:
+        return !randSeedInt(4) ? 1 : 0;
       case SpeciesId.PIKACHU:
         if (this.currentBattle?.battleType === BattleType.TRAINER && this.currentBattle?.waveIndex < 30) {
           return 0; // Ban Cosplay and Partner Pika from Trainers before wave 30
@@ -2100,12 +2095,15 @@ export default class BattleScene extends SceneBase {
   }
 
   getMaxExpLevel(ignoreLevelCap = false): number {
-    if (Overrides.LEVEL_CAP_OVERRIDE > 0) {
-      return Overrides.LEVEL_CAP_OVERRIDE;
+    const capOverride = Overrides.LEVEL_CAP_OVERRIDE ?? 0;
+    if (capOverride > 0) {
+      return capOverride;
     }
-    if (ignoreLevelCap || Overrides.LEVEL_CAP_OVERRIDE < 0) {
+
+    if (ignoreLevelCap || capOverride < 0) {
       return Number.MAX_SAFE_INTEGER;
     }
+
     const waveIndex = Math.ceil((this.currentBattle?.waveIndex || 1) / 10) * 10;
     const difficultyWaveIndex = this.gameMode.getWaveForDifficulty(waveIndex);
     const baseLevel = (1 + difficultyWaveIndex / 2 + Math.pow(difficultyWaveIndex / 25, 2)) * 1.2;
@@ -2745,7 +2743,7 @@ export default class BattleScene extends SceneBase {
     const cancelled = new BooleanHolder(false);
 
     if (source && source.isPlayer() !== target.isPlayer()) {
-      applyAbAttrs(BlockItemTheftAbAttr, source, cancelled);
+      applyAbAttrs("BlockItemTheftAbAttr", source, cancelled);
     }
 
     if (cancelled.value) {
@@ -2785,13 +2783,13 @@ export default class BattleScene extends SceneBase {
           if (target.isPlayer()) {
             this.addModifier(newItemModifier, ignoreUpdate, playSound, false, instant);
             if (source && itemLost) {
-              applyPostItemLostAbAttrs(PostItemLostAbAttr, source, false);
+              applyPostItemLostAbAttrs("PostItemLostAbAttr", source, false);
             }
             return true;
           }
           this.addEnemyModifier(newItemModifier, ignoreUpdate, instant);
           if (source && itemLost) {
-            applyPostItemLostAbAttrs(PostItemLostAbAttr, source, false);
+            applyPostItemLostAbAttrs("PostItemLostAbAttr", source, false);
           }
           return true;
         }
@@ -2814,7 +2812,7 @@ export default class BattleScene extends SceneBase {
     const cancelled = new BooleanHolder(false);
 
     if (source && source.isPlayer() !== target.isPlayer()) {
-      applyAbAttrs(BlockItemTheftAbAttr, source, cancelled);
+      applyAbAttrs("BlockItemTheftAbAttr", source, cancelled);
     }
 
     if (cancelled.value) {
@@ -2969,6 +2967,13 @@ export default class BattleScene extends SceneBase {
       ) {
         modifiers.splice(m--, 1);
       }
+      if (
+        modifier instanceof PokemonHeldItemModifier &&
+        !isNullOrUndefined(modifier.getSpecies()) &&
+        !this.getPokemonById(modifier.pokemonId)?.hasSpecies(modifier.getSpecies()!)
+      ) {
+        modifiers.splice(m--, 1);
+      }
     }
     for (const modifier of modifiers) {
       if (modifier instanceof PersistentModifier) {
@@ -3498,17 +3503,13 @@ export default class BattleScene extends SceneBase {
         sessionEncounterRate +
         Math.min(currentRunDiffFromAvg * ANTI_VARIANCE_WEIGHT_MODIFIER, MYSTERY_ENCOUNTER_SPAWN_MAX_WEIGHT / 2);
 
-      const successRate = isNullOrUndefined(Overrides.MYSTERY_ENCOUNTER_RATE_OVERRIDE)
-        ? favoredEncounterRate
-        : Overrides.MYSTERY_ENCOUNTER_RATE_OVERRIDE!;
+      const successRate = Overrides.MYSTERY_ENCOUNTER_RATE_OVERRIDE ?? favoredEncounterRate;
 
-      // If the most recent ME was 3 or fewer waves ago, can never spawn a ME
+      // MEs can only spawn 3 or more waves after the previous ME, barring overrides
       const canSpawn =
-        encounteredEvents.length === 0 ||
-        waveIndex - encounteredEvents[encounteredEvents.length - 1].waveIndex > 3 ||
-        !isNullOrUndefined(Overrides.MYSTERY_ENCOUNTER_RATE_OVERRIDE);
+        encounteredEvents.length === 0 || waveIndex - encounteredEvents[encounteredEvents.length - 1].waveIndex > 3;
 
-      if (canSpawn) {
+      if (canSpawn || Overrides.MYSTERY_ENCOUNTER_RATE_OVERRIDE !== null) {
         let roll = MYSTERY_ENCOUNTER_SPAWN_MAX_WEIGHT;
         // Always rolls the check on the same offset to ensure no RNG changes from reloading session
         this.executeWithSeedOffset(

src/battle.ts

@@ -13,7 +13,7 @@ import {
 import Trainer from "./field/trainer";
 import { TrainerVariant } from "#enums/trainer-variant";
 import type { GameMode } from "./game-mode";
-import { MoneyMultiplierModifier, PokemonHeldItemModifier } from "./modifier/modifier";
+import { MoneyMultiplierModifier, type PokemonHeldItemModifier } from "./modifier/modifier";
 import type { PokeballType } from "#enums/pokeball";
 import { trainerConfigs } from "#app/data/trainers/trainer-config";
 import { SpeciesFormKey } from "#enums/species-form-key";
@@ -30,7 +30,7 @@ import i18next from "#app/plugins/i18n";
 import type MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";
 import { MysteryEncounterMode } from "#enums/mystery-encounter-mode";
 import type { CustomModifierSettings } from "#app/modifier/modifier-type";
-import { ModifierTier } from "#app/modifier/modifier-tier";
+import { ModifierTier } from "#enums/modifier-tier";
 import type { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { BattleType } from "#enums/battle-type";
 import { ClassicFixedBossWaves } from "#enums/fixed-boss-waves";
@@ -173,7 +173,7 @@ export default class Battle {
     this.postBattleLoot.push(
       ...globalScene
         .findModifiers(
-          m => m instanceof PokemonHeldItemModifier && m.pokemonId === enemyPokemon.id && m.isTransferable,
+          m => m.is("PokemonHeldItemModifier") && m.pokemonId === enemyPokemon.id && m.isTransferable,
           false,
         )
         .map(i => {

src/constants.ts

@@ -54,3 +54,43 @@ export const defaultStarterSpecies: SpeciesId[] = [
 ];
 
 export const saveKey = "x0i2O7WRiANTqPmZ"; // Temporary; secure encryption is not yet necessary
+
+/**
+ * Spawn chance: (BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT + WIGHT_INCREMENT_ON_SPAWN_MISS * <number of missed spawns>) / MYSTERY_ENCOUNTER_SPAWN_MAX_WEIGHT
+ */
+export const BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT = 3;
+
+/**
+ * The divisor for determining ME spawns, defines the "maximum" weight required for a spawn
+ * If spawn_weight === MYSTERY_ENCOUNTER_SPAWN_MAX_WEIGHT, 100% chance to spawn a ME
+ */
+export const MYSTERY_ENCOUNTER_SPAWN_MAX_WEIGHT = 256;
+
+/**
+ * When an ME spawn roll fails, WEIGHT_INCREMENT_ON_SPAWN_MISS is added to future rolls for ME spawn checks.
+ * These values are cleared whenever the next ME spawns, and spawn weight returns to BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT
+ */
+export const WEIGHT_INCREMENT_ON_SPAWN_MISS = 3;
+
+/**
+ * Specifies the target average for total ME spawns in a single Classic run.
+ * Used by anti-variance mechanic to check whether a run is above or below the target on a given wave.
+ */
+export const AVERAGE_ENCOUNTERS_PER_RUN_TARGET = 12;
+
+/**
+ * Will increase/decrease the chance of spawning a ME based on the current run's total MEs encountered vs AVERAGE_ENCOUNTERS_PER_RUN_TARGET
+ * Example:
+ * AVERAGE_ENCOUNTERS_PER_RUN_TARGET = 17 (expects avg 1 ME every 10 floors)
+ * ANTI_VARIANCE_WEIGHT_MODIFIER = 15
+ *
+ * On wave 20, if 1 ME has been encountered, the difference from expected average is 0 MEs.
+ * So anti-variance adds 0/256 to the spawn weight check for ME spawn.
+ *
+ * On wave 20, if 0 MEs have been encountered, the difference from expected average is 1 ME.
+ * So anti-variance adds 15/256 to the spawn weight check for ME spawn.
+ *
+ * On wave 20, if 2 MEs have been encountered, the difference from expected average is -1 ME.
+ * So anti-variance adds -15/256 to the spawn weight check for ME spawn.
+ */
+export const ANTI_VARIANCE_WEIGHT_MODIFIER = 15;

src/data/abilities/ab-attrs/ab-attr.ts

@@ -1,58 +0,0 @@
-import type { AbAttrCondition } from "#app/@types/ability-types";
-import type Pokemon from "#app/field/pokemon";
-import type { BooleanHolder } from "#app/utils/common";
-
-export abstract class AbAttr {
-  public showAbility: boolean;
-  private extraCondition: AbAttrCondition;
-
-  /**
-   * @param showAbility - Whether to show this ability as a flyout during battle; default `true`.
-   * Should be kept in parity with mainline where possible.
-   */
-  constructor(showAbility = true) {
-    this.showAbility = showAbility;
-  }
-
-  /**
-   * Applies ability effects without checking conditions
-   * @param _pokemon - The pokemon to apply this ability to
-   * @param _passive - Whether or not the ability is a passive
-   * @param _simulated - Whether the call is simulated
-   * @param _args - Extra args passed to the function. Handled by child classes.
-   * @see {@linkcode canApply}
-   */
-  apply(
-    _pokemon: Pokemon,
-    _passive: boolean,
-    _simulated: boolean,
-    _cancelled: BooleanHolder | null,
-    _args: any[],
-  ): void {}
-
-  getTriggerMessage(_pokemon: Pokemon, _abilityName: string, ..._args: any[]): string | null {
-    return null;
-  }
-
-  getCondition(): AbAttrCondition | null {
-    return this.extraCondition || null;
-  }
-
-  addCondition(condition: AbAttrCondition): AbAttr {
-    this.extraCondition = condition;
-    return this;
-  }
-
-  /**
-   * Returns a boolean describing whether the ability can be applied under current conditions
-   * @param _pokemon - The pokemon to apply this ability to
-   * @param _passive - Whether or not the ability is a passive
-   * @param _simulated - Whether the call is simulated
-   * @param _args - Extra args passed to the function. Handled by child classes.
-   * @returns `true` if the ability can be applied, `false` otherwise
-   * @see {@linkcode apply}
-   */
-  canApply(_pokemon: Pokemon, _passive: boolean, _simulated: boolean, _args: any[]): boolean {
-    return true;
-  }
-}

src/data/abilities/ability-class.ts

@@ -1,137 +0,0 @@
-import { AbilityId } from "#enums/ability-id";
-import type { AbAttrCondition } from "#app/@types/ability-types";
-import type { AbAttr } from "#app/data/abilities/ab-attrs/ab-attr";
-import i18next from "i18next";
-import type { Localizable } from "#app/@types/locales";
-import type { Constructor } from "#app/utils/common";
-
-export class Ability implements Localizable {
-  public id: AbilityId;
-
-  private nameAppend: string;
-  public name: string;
-  public description: string;
-  public generation: number;
-  public isBypassFaint: boolean;
-  public isIgnorable: boolean;
-  public isSuppressable = true;
-  public isCopiable = true;
-  public isReplaceable = true;
-  public attrs: AbAttr[];
-  public conditions: AbAttrCondition[];
-
-  constructor(id: AbilityId, generation: number) {
-    this.id = id;
-
-    this.nameAppend = "";
-    this.generation = generation;
-    this.attrs = [];
-    this.conditions = [];
-
-    this.isSuppressable = true;
-    this.isCopiable = true;
-    this.isReplaceable = true;
-
-    this.localize();
-  }
-
-  public get isSwappable(): boolean {
-    return this.isCopiable && this.isReplaceable;
-  }
-  localize(): void {
-    const i18nKey = AbilityId[this.id]
-      .split("_")
-      .filter(f => f)
-      .map((f, i) => (i ? `${f[0]}${f.slice(1).toLowerCase()}` : f.toLowerCase()))
-      .join("") as string;
-
-    this.name = this.id ? `${i18next.t(`ability:${i18nKey}.name`) as string}${this.nameAppend}` : "";
-    this.description = this.id ? (i18next.t(`ability:${i18nKey}.description`) as string) : "";
-  }
-
-  /**
-   * Get all ability attributes that match `attrType`
-   * @param attrType any attribute that extends {@linkcode AbAttr}
-   * @returns Array of attributes that match `attrType`, Empty Array if none match.
-   */
-  getAttrs<T extends AbAttr>(attrType: Constructor<T>): T[] {
-    return this.attrs.filter((a): a is T => a instanceof attrType);
-  }
-
-  /**
-   * Check if an ability has an attribute that matches `attrType`
-   * @param attrType any attribute that extends {@linkcode AbAttr}
-   * @returns true if the ability has attribute `attrType`
-   */
-  hasAttr<T extends AbAttr>(attrType: Constructor<T>): boolean {
-    return this.attrs.some(attr => attr instanceof attrType);
-  }
-
-  attr<T extends Constructor<AbAttr>>(AttrType: T, ...args: ConstructorParameters<T>): Ability {
-    const attr = new AttrType(...args);
-    this.attrs.push(attr);
-
-    return this;
-  }
-
-  conditionalAttr<T extends Constructor<AbAttr>>(
-    condition: AbAttrCondition,
-    AttrType: T,
-    ...args: ConstructorParameters<T>
-  ): Ability {
-    const attr = new AttrType(...args);
-    attr.addCondition(condition);
-    this.attrs.push(attr);
-
-    return this;
-  }
-
-  bypassFaint(): Ability {
-    this.isBypassFaint = true;
-    return this;
-  }
-
-  ignorable(): Ability {
-    this.isIgnorable = true;
-    return this;
-  }
-
-  unsuppressable(): Ability {
-    this.isSuppressable = false;
-    return this;
-  }
-
-  uncopiable(): Ability {
-    this.isCopiable = false;
-    return this;
-  }
-
-  unreplaceable(): Ability {
-    this.isReplaceable = false;
-    return this;
-  }
-
-  condition(condition: AbAttrCondition): Ability {
-    this.conditions.push(condition);
-
-    return this;
-  }
-
-  partial(): this {
-    this.nameAppend += " (P)";
-    return this;
-  }
-
-  unimplemented(): this {
-    this.nameAppend += " (N)";
-    return this;
-  }
-
-  /**
-   * Internal flag used for developers to document edge cases. When using this, please be sure to document the edge case.
-   * @returns the ability
-   */
-  edgeCase(): this {
-    return this;
-  }
-}

src/data/abilities/apply-ab-attrs.ts

@@ -0,0 +1,832 @@
+import type { AbAttrApplyFunc, AbAttrMap, AbAttrString, AbAttrSuccessFunc } from "#app/@types/ability-types";
+import type Pokemon from "#app/field/pokemon";
+import { globalScene } from "#app/global-scene";
+import type { BooleanHolder, NumberHolder } from "#app/utils/common";
+import type { BattlerIndex } from "#enums/battler-index";
+import type { HitResult } from "#enums/hit-result";
+import type { BattleStat, Stat } from "#enums/stat";
+import type { StatusEffect } from "#enums/status-effect";
+import type { WeatherType } from "#enums/weather-type";
+import type { BattlerTag } from "../battler-tags";
+import type Move from "../moves/move";
+import type { PokemonMove } from "../moves/pokemon-move";
+import type { TerrainType } from "../terrain";
+import type { Weather } from "../weather";
+import type {
+  PostBattleInitAbAttr,
+  PreDefendAbAttr,
+  PostDefendAbAttr,
+  PostMoveUsedAbAttr,
+  StatMultiplierAbAttr,
+  AllyStatMultiplierAbAttr,
+  PostSetStatusAbAttr,
+  PostDamageAbAttr,
+  FieldMultiplyStatAbAttr,
+  PreAttackAbAttr,
+  ExecutedMoveAbAttr,
+  PostAttackAbAttr,
+  PostKnockOutAbAttr,
+  PostVictoryAbAttr,
+  PostSummonAbAttr,
+  PreSummonAbAttr,
+  PreSwitchOutAbAttr,
+  PreLeaveFieldAbAttr,
+  PreStatStageChangeAbAttr,
+  PostStatStageChangeAbAttr,
+  PreSetStatusAbAttr,
+  PreApplyBattlerTagAbAttr,
+  PreWeatherEffectAbAttr,
+  PreWeatherDamageAbAttr,
+  PostTurnAbAttr,
+  PostWeatherChangeAbAttr,
+  PostWeatherLapseAbAttr,
+  PostTerrainChangeAbAttr,
+  CheckTrappedAbAttr,
+  PostBattleAbAttr,
+  PostFaintAbAttr,
+  PostItemLostAbAttr,
+} from "./ability";
+
+function applySingleAbAttrs<T extends AbAttrString>(
+  pokemon: Pokemon,
+  passive: boolean,
+  attrType: T,
+  applyFunc: AbAttrApplyFunc<AbAttrMap[T]>,
+  successFunc: AbAttrSuccessFunc<AbAttrMap[T]>,
+  args: any[],
+  gainedMidTurn = false,
+  simulated = false,
+  messages: string[] = [],
+) {
+  if (!pokemon?.canApplyAbility(passive) || (passive && pokemon.getPassiveAbility().id === pokemon.getAbility().id)) {
+    return;
+  }
+
+  const ability = passive ? pokemon.getPassiveAbility() : pokemon.getAbility();
+  if (
+    gainedMidTurn &&
+    ability.getAttrs(attrType).some(attr => {
+      attr.is("PostSummonAbAttr") && !attr.shouldActivateOnGain();
+    })
+  ) {
+    return;
+  }
+
+  for (const attr of ability.getAttrs(attrType)) {
+    const condition = attr.getCondition();
+    let abShown = false;
+    if ((condition && !condition(pokemon)) || !successFunc(attr, passive)) {
+      continue;
+    }
+
+    globalScene.phaseManager.setPhaseQueueSplice();
+
+    if (attr.showAbility && !simulated) {
+      globalScene.phaseManager.queueAbilityDisplay(pokemon, passive, true);
+      abShown = true;
+    }
+    const message = attr.getTriggerMessage(pokemon, ability.name, args);
+    if (message) {
+      if (!simulated) {
+        globalScene.phaseManager.queueMessage(message);
+      }
+      messages.push(message);
+    }
+
+    applyFunc(attr, passive);
+
+    if (abShown) {
+      globalScene.phaseManager.queueAbilityDisplay(pokemon, passive, false);
+    }
+
+    if (!simulated) {
+      pokemon.waveData.abilitiesApplied.add(ability.id);
+    }
+
+    globalScene.phaseManager.clearPhaseQueueSplice();
+  }
+}
+
+function applyAbAttrsInternal<T extends AbAttrString>(
+  attrType: T,
+  pokemon: Pokemon | null,
+  applyFunc: AbAttrApplyFunc<AbAttrMap[T]>,
+  successFunc: AbAttrSuccessFunc<AbAttrMap[T]>,
+  args: any[],
+  simulated = false,
+  messages: string[] = [],
+  gainedMidTurn = false,
+) {
+  for (const passive of [false, true]) {
+    if (pokemon) {
+      applySingleAbAttrs(pokemon, passive, attrType, applyFunc, successFunc, args, gainedMidTurn, simulated, messages);
+      globalScene.phaseManager.clearPhaseQueueSplice();
+    }
+  }
+}
+
+export function applyAbAttrs<T extends AbAttrString>(
+  attrType: T,
+  pokemon: Pokemon,
+  cancelled: BooleanHolder | null,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal<T>(
+    attrType,
+    pokemon,
+    // @ts-expect-error: TODO: fix the error on `cancelled`
+    (attr, passive) => attr.apply(pokemon, passive, simulated, cancelled, args),
+    (attr, passive) => attr.canApply(pokemon, passive, simulated, args),
+    args,
+    simulated,
+  );
+}
+
+// TODO: Improve the type signatures of the following methods / refactor the apply methods
+
+export function applyPostBattleInitAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostBattleInitAbAttr ? K : never,
+  pokemon: Pokemon,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) => (attr as PostBattleInitAbAttr).applyPostBattleInit(pokemon, passive, simulated, args),
+    (attr, passive) => (attr as PostBattleInitAbAttr).canApplyPostBattleInit(pokemon, passive, simulated, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPreDefendAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PreDefendAbAttr ? K : never,
+  pokemon: Pokemon,
+  attacker: Pokemon,
+  move: Move | null,
+  cancelled: BooleanHolder | null,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PreDefendAbAttr).applyPreDefend(pokemon, passive, simulated, attacker, move, cancelled, args),
+    (attr, passive) =>
+      (attr as PreDefendAbAttr).canApplyPreDefend(pokemon, passive, simulated, attacker, move, cancelled, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostDefendAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostDefendAbAttr ? K : never,
+  pokemon: Pokemon,
+  attacker: Pokemon,
+  move: Move,
+  hitResult: HitResult | null,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PostDefendAbAttr).applyPostDefend(pokemon, passive, simulated, attacker, move, hitResult, args),
+    (attr, passive) =>
+      (attr as PostDefendAbAttr).canApplyPostDefend(pokemon, passive, simulated, attacker, move, hitResult, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostMoveUsedAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostMoveUsedAbAttr ? K : never,
+  pokemon: Pokemon,
+  move: PokemonMove,
+  source: Pokemon,
+  targets: BattlerIndex[],
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, _passive) => (attr as PostMoveUsedAbAttr).applyPostMoveUsed(pokemon, move, source, targets, simulated, args),
+    (attr, _passive) =>
+      (attr as PostMoveUsedAbAttr).canApplyPostMoveUsed(pokemon, move, source, targets, simulated, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyStatMultiplierAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends StatMultiplierAbAttr ? K : never,
+  pokemon: Pokemon,
+  stat: BattleStat,
+  statValue: NumberHolder,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as StatMultiplierAbAttr).applyStatStage(pokemon, passive, simulated, stat, statValue, args),
+    (attr, passive) =>
+      (attr as StatMultiplierAbAttr).canApplyStatStage(pokemon, passive, simulated, stat, statValue, args),
+    args,
+  );
+}
+
+/**
+ * Applies an ally's Stat multiplier attribute
+ * @param attrType - {@linkcode AllyStatMultiplierAbAttr} should always be AllyStatMultiplierAbAttr for the time being
+ * @param pokemon - The {@linkcode Pokemon} with the ability
+ * @param stat - The type of the checked {@linkcode Stat}
+ * @param statValue - {@linkcode NumberHolder} containing the value of the checked stat
+ * @param checkedPokemon - The {@linkcode Pokemon} with the checked stat
+ * @param ignoreAbility - Whether or not the ability should be ignored by the pokemon or its move.
+ * @param args - unused
+ */
+export function applyAllyStatMultiplierAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends AllyStatMultiplierAbAttr ? K : never,
+  pokemon: Pokemon,
+  stat: BattleStat,
+  statValue: NumberHolder,
+  simulated = false,
+  checkedPokemon: Pokemon,
+  ignoreAbility: boolean,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as AllyStatMultiplierAbAttr).applyAllyStat(
+        pokemon,
+        passive,
+        simulated,
+        stat,
+        statValue,
+        checkedPokemon,
+        ignoreAbility,
+        args,
+      ),
+    (attr, passive) =>
+      (attr as AllyStatMultiplierAbAttr).canApplyAllyStat(
+        pokemon,
+        passive,
+        simulated,
+        stat,
+        statValue,
+        checkedPokemon,
+        ignoreAbility,
+        args,
+      ),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostSetStatusAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostSetStatusAbAttr ? K : never,
+  pokemon: Pokemon,
+  effect: StatusEffect,
+  sourcePokemon?: Pokemon | null,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PostSetStatusAbAttr).applyPostSetStatus(pokemon, sourcePokemon, passive, effect, simulated, args),
+    (attr, passive) =>
+      (attr as PostSetStatusAbAttr).canApplyPostSetStatus(pokemon, sourcePokemon, passive, effect, simulated, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostDamageAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostDamageAbAttr ? K : never,
+  pokemon: Pokemon,
+  damage: number,
+  _passive: boolean,
+  simulated = false,
+  args: any[],
+  source?: Pokemon,
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) => (attr as PostDamageAbAttr).applyPostDamage(pokemon, damage, passive, simulated, args, source),
+    (attr, passive) => (attr as PostDamageAbAttr).canApplyPostDamage(pokemon, damage, passive, simulated, args, source),
+    args,
+  );
+}
+/**
+ * Applies a field Stat multiplier attribute
+ * @param attrType {@linkcode FieldMultiplyStatAbAttr} should always be FieldMultiplyBattleStatAbAttr for the time being
+ * @param pokemon {@linkcode Pokemon} the Pokemon applying this ability
+ * @param stat {@linkcode Stat} the type of the checked stat
+ * @param statValue {@linkcode NumberHolder} the value of the checked stat
+ * @param checkedPokemon {@linkcode Pokemon} the Pokemon with the checked stat
+ * @param hasApplied {@linkcode BooleanHolder} whether or not a FieldMultiplyBattleStatAbAttr has already affected this stat
+ * @param args unused
+ */
+
+export function applyFieldStatMultiplierAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends FieldMultiplyStatAbAttr ? K : never,
+  pokemon: Pokemon,
+  stat: Stat,
+  statValue: NumberHolder,
+  checkedPokemon: Pokemon,
+  hasApplied: BooleanHolder,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as FieldMultiplyStatAbAttr).applyFieldStat(
+        pokemon,
+        passive,
+        simulated,
+        stat,
+        statValue,
+        checkedPokemon,
+        hasApplied,
+        args,
+      ),
+    (attr, passive) =>
+      (attr as FieldMultiplyStatAbAttr).canApplyFieldStat(
+        pokemon,
+        passive,
+        simulated,
+        stat,
+        statValue,
+        checkedPokemon,
+        hasApplied,
+        args,
+      ),
+    args,
+  );
+}
+
+export function applyPreAttackAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PreAttackAbAttr ? K : never,
+  pokemon: Pokemon,
+  defender: Pokemon | null,
+  move: Move,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) => (attr as PreAttackAbAttr).applyPreAttack(pokemon, passive, simulated, defender, move, args),
+    (attr, passive) => (attr as PreAttackAbAttr).canApplyPreAttack(pokemon, passive, simulated, defender, move, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyExecutedMoveAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends ExecutedMoveAbAttr ? K : never,
+  pokemon: Pokemon,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    attr => (attr as ExecutedMoveAbAttr).applyExecutedMove(pokemon, simulated),
+    attr => (attr as ExecutedMoveAbAttr).canApplyExecutedMove(pokemon, simulated),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostAttackAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostAttackAbAttr ? K : never,
+  pokemon: Pokemon,
+  defender: Pokemon,
+  move: Move,
+  hitResult: HitResult | null,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PostAttackAbAttr).applyPostAttack(pokemon, passive, simulated, defender, move, hitResult, args),
+    (attr, passive) =>
+      (attr as PostAttackAbAttr).canApplyPostAttack(pokemon, passive, simulated, defender, move, hitResult, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostKnockOutAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostKnockOutAbAttr ? K : never,
+  pokemon: Pokemon,
+  knockedOut: Pokemon,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) => (attr as PostKnockOutAbAttr).applyPostKnockOut(pokemon, passive, simulated, knockedOut, args),
+    (attr, passive) => (attr as PostKnockOutAbAttr).canApplyPostKnockOut(pokemon, passive, simulated, knockedOut, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostVictoryAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostVictoryAbAttr ? K : never,
+  pokemon: Pokemon,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) => (attr as PostVictoryAbAttr).applyPostVictory(pokemon, passive, simulated, args),
+    (attr, passive) => (attr as PostVictoryAbAttr).canApplyPostVictory(pokemon, passive, simulated, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostSummonAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostSummonAbAttr ? K : never,
+  pokemon: Pokemon,
+  passive = false,
+  simulated = false,
+  ...args: any[]
+): void {
+  applySingleAbAttrs(
+    pokemon,
+    passive,
+    attrType,
+    (attr, passive) => (attr as PostSummonAbAttr).applyPostSummon(pokemon, passive, simulated, args),
+    (attr, passive) => (attr as PostSummonAbAttr).canApplyPostSummon(pokemon, passive, simulated, args),
+    args,
+    false,
+    simulated,
+  );
+}
+
+export function applyPreSummonAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PreSummonAbAttr ? K : never,
+  pokemon: Pokemon,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) => (attr as PreSummonAbAttr).applyPreSummon(pokemon, passive, args),
+    (attr, passive) => (attr as PreSummonAbAttr).canApplyPreSummon(pokemon, passive, args),
+    args,
+  );
+}
+
+export function applyPreSwitchOutAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PreSwitchOutAbAttr ? K : never,
+  pokemon: Pokemon,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) => (attr as PreSwitchOutAbAttr).applyPreSwitchOut(pokemon, passive, simulated, args),
+    (attr, passive) => (attr as PreSwitchOutAbAttr).canApplyPreSwitchOut(pokemon, passive, simulated, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPreLeaveFieldAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PreLeaveFieldAbAttr ? K : never,
+  pokemon: Pokemon,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) => (attr as PreLeaveFieldAbAttr).applyPreLeaveField(pokemon, passive, simulated, args),
+    (attr, passive) => (attr as PreLeaveFieldAbAttr).canApplyPreLeaveField(pokemon, passive, simulated, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPreStatStageChangeAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PreStatStageChangeAbAttr ? K : never,
+  pokemon: Pokemon | null,
+  stat: BattleStat,
+  cancelled: BooleanHolder,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PreStatStageChangeAbAttr).applyPreStatStageChange(pokemon, passive, simulated, stat, cancelled, args),
+    (attr, passive) =>
+      (attr as PreStatStageChangeAbAttr).canApplyPreStatStageChange(pokemon, passive, simulated, stat, cancelled, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostStatStageChangeAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostStatStageChangeAbAttr ? K : never,
+  pokemon: Pokemon,
+  stats: BattleStat[],
+  stages: number,
+  selfTarget: boolean,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, _passive) =>
+      (attr as PostStatStageChangeAbAttr).applyPostStatStageChange(pokemon, simulated, stats, stages, selfTarget, args),
+    (attr, _passive) =>
+      (attr as PostStatStageChangeAbAttr).canApplyPostStatStageChange(
+        pokemon,
+        simulated,
+        stats,
+        stages,
+        selfTarget,
+        args,
+      ),
+    args,
+    simulated,
+  );
+}
+
+export function applyPreSetStatusAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PreSetStatusAbAttr ? K : never,
+  pokemon: Pokemon,
+  effect: StatusEffect | undefined,
+  cancelled: BooleanHolder,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PreSetStatusAbAttr).applyPreSetStatus(pokemon, passive, simulated, effect, cancelled, args),
+    (attr, passive) =>
+      (attr as PreSetStatusAbAttr).canApplyPreSetStatus(pokemon, passive, simulated, effect, cancelled, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPreApplyBattlerTagAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PreApplyBattlerTagAbAttr ? K : never,
+  pokemon: Pokemon,
+  tag: BattlerTag,
+  cancelled: BooleanHolder,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PreApplyBattlerTagAbAttr).applyPreApplyBattlerTag(pokemon, passive, simulated, tag, cancelled, args),
+    (attr, passive) =>
+      (attr as PreApplyBattlerTagAbAttr).canApplyPreApplyBattlerTag(pokemon, passive, simulated, tag, cancelled, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPreWeatherEffectAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PreWeatherEffectAbAttr ? K : never,
+  pokemon: Pokemon,
+  weather: Weather | null,
+  cancelled: BooleanHolder,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PreWeatherDamageAbAttr).applyPreWeatherEffect(pokemon, passive, simulated, weather, cancelled, args),
+    (attr, passive) =>
+      (attr as PreWeatherDamageAbAttr).canApplyPreWeatherEffect(pokemon, passive, simulated, weather, cancelled, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostTurnAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostTurnAbAttr ? K : never,
+  pokemon: Pokemon,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) => (attr as PostTurnAbAttr).applyPostTurn(pokemon, passive, simulated, args),
+    (attr, passive) => (attr as PostTurnAbAttr).canApplyPostTurn(pokemon, passive, simulated, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostWeatherChangeAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostWeatherChangeAbAttr ? K : never,
+  pokemon: Pokemon,
+  weather: WeatherType,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PostWeatherChangeAbAttr).applyPostWeatherChange(pokemon, passive, simulated, weather, args),
+    (attr, passive) =>
+      (attr as PostWeatherChangeAbAttr).canApplyPostWeatherChange(pokemon, passive, simulated, weather, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostWeatherLapseAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostWeatherLapseAbAttr ? K : never,
+  pokemon: Pokemon,
+  weather: Weather | null,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PostWeatherLapseAbAttr).applyPostWeatherLapse(pokemon, passive, simulated, weather, args),
+    (attr, passive) =>
+      (attr as PostWeatherLapseAbAttr).canApplyPostWeatherLapse(pokemon, passive, simulated, weather, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostTerrainChangeAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostTerrainChangeAbAttr ? K : never,
+  pokemon: Pokemon,
+  terrain: TerrainType,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PostTerrainChangeAbAttr).applyPostTerrainChange(pokemon, passive, simulated, terrain, args),
+    (attr, passive) =>
+      (attr as PostTerrainChangeAbAttr).canApplyPostTerrainChange(pokemon, passive, simulated, terrain, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyCheckTrappedAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends CheckTrappedAbAttr ? K : never,
+  pokemon: Pokemon,
+  trapped: BooleanHolder,
+  otherPokemon: Pokemon,
+  messages: string[],
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as CheckTrappedAbAttr).applyCheckTrapped(pokemon, passive, simulated, trapped, otherPokemon, args),
+    (attr, passive) =>
+      (attr as CheckTrappedAbAttr).canApplyCheckTrapped(pokemon, passive, simulated, trapped, otherPokemon, args),
+    args,
+    simulated,
+    messages,
+  );
+}
+
+export function applyPostBattleAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostBattleAbAttr ? K : never,
+  pokemon: Pokemon,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) => (attr as PostBattleAbAttr).applyPostBattle(pokemon, passive, simulated, args),
+    (attr, passive) => (attr as PostBattleAbAttr).canApplyPostBattle(pokemon, passive, simulated, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostFaintAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostFaintAbAttr ? K : never,
+  pokemon: Pokemon,
+  attacker?: Pokemon,
+  move?: Move,
+  hitResult?: HitResult,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, passive) =>
+      (attr as PostFaintAbAttr).applyPostFaint(pokemon, passive, simulated, attacker, move, hitResult, args),
+    (attr, passive) =>
+      (attr as PostFaintAbAttr).canApplyPostFaint(pokemon, passive, simulated, attacker, move, hitResult, args),
+    args,
+    simulated,
+  );
+}
+
+export function applyPostItemLostAbAttrs<K extends AbAttrString>(
+  attrType: AbAttrMap[K] extends PostItemLostAbAttr ? K : never,
+  pokemon: Pokemon,
+  simulated = false,
+  ...args: any[]
+): void {
+  applyAbAttrsInternal(
+    attrType,
+    pokemon,
+    (attr, _passive) => (attr as PostItemLostAbAttr).applyPostItemLost(pokemon, simulated, args),
+    (attr, _passive) => (attr as PostItemLostAbAttr).canApplyPostItemLost(pokemon, simulated, args),
+    args,
+  );
+}
+
+/**
+ * Applies abilities when they become active mid-turn (ability switch)
+ *
+ * Ignores passives as they don't change and shouldn't be reapplied when main abilities change
+ */
+export function applyOnGainAbAttrs(pokemon: Pokemon, passive = false, simulated = false, ...args: any[]): void {
+  applySingleAbAttrs(
+    pokemon,
+    passive,
+    "PostSummonAbAttr",
+    (attr, passive) => attr.applyPostSummon(pokemon, passive, simulated, args),
+    (attr, passive) => attr.canApplyPostSummon(pokemon, passive, simulated, args),
+    args,
+    true,
+    simulated,
+  );
+}
+/**
+ * Applies ability attributes which activate when the ability is lost or suppressed (i.e. primal weather)
+ */
+export function applyOnLoseAbAttrs(pokemon: Pokemon, passive = false, simulated = false, ...args: any[]): void {
+  applySingleAbAttrs(
+    pokemon,
+    passive,
+    "PreLeaveFieldAbAttr",
+    (attr, passive) => attr.applyPreLeaveField(pokemon, passive, simulated, [...args, true]),
+    (attr, passive) => attr.canApplyPreLeaveField(pokemon, passive, simulated, [...args, true]),
+    args,
+    true,
+    simulated,
+  );
+
+  applySingleAbAttrs(
+    pokemon,
+    passive,
+    "IllusionBreakAbAttr",
+    (attr, passive) => attr.apply(pokemon, passive, simulated, null, args),
+    (attr, passive) => attr.canApply(pokemon, passive, simulated, args),
+    args,
+    true,
+    simulated,
+  );
+}

src/data/arena-tag.ts

@@ -10,15 +10,7 @@ import type Pokemon from "#app/field/pokemon";
 import { HitResult } from "#enums/hit-result";
 import { StatusEffect } from "#enums/status-effect";
 import type { BattlerIndex } from "#enums/battler-index";
-import {
-  BlockNonDirectDamageAbAttr,
-  InfiltratorAbAttr,
-  PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr,
-  ProtectStatAbAttr,
-  applyAbAttrs,
-  applyOnGainAbAttrs,
-  applyOnLoseAbAttrs,
-} from "#app/data/abilities/ability";
+import { applyAbAttrs, applyOnGainAbAttrs, applyOnLoseAbAttrs } from "./abilities/apply-ab-attrs";
 import { Stat } from "#enums/stat";
 import { CommonBattleAnim } from "#app/data/battle-anims";
 import { CommonAnim } from "#enums/move-anims-common";
@@ -28,6 +20,7 @@ import { ArenaTagType } from "#enums/arena-tag-type";
 import { BattlerTagType } from "#enums/battler-tag-type";
 import { MoveId } from "#enums/move-id";
 import { ArenaTagSide } from "#enums/arena-tag-side";
+import { MoveUseMode } from "#enums/move-use-mode";
 
 export abstract class ArenaTag {
   constructor(
@@ -144,7 +137,7 @@ export class MistTag extends ArenaTag {
     if (attacker) {
       const bypassed = new BooleanHolder(false);
       // TODO: Allow this to be simulated
-      applyAbAttrs(InfiltratorAbAttr, attacker, null, false, bypassed);
+      applyAbAttrs("InfiltratorAbAttr", attacker, null, false, bypassed);
       if (bypassed.value) {
         return false;
       }
@@ -209,7 +202,7 @@ export class WeakenMoveScreenTag extends ArenaTag {
   ): boolean {
     if (this.weakenedCategories.includes(moveCategory)) {
       const bypassed = new BooleanHolder(false);
-      applyAbAttrs(InfiltratorAbAttr, attacker, null, false, bypassed);
+      applyAbAttrs("InfiltratorAbAttr", attacker, null, false, bypassed);
       if (bypassed.value) {
         return false;
       }
@@ -765,7 +758,7 @@ class SpikesTag extends ArenaTrapTag {
     }
 
     const cancelled = new BooleanHolder(false);
-    applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
+    applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
     if (simulated || cancelled.value) {
       return !cancelled.value;
     }
@@ -883,13 +876,13 @@ export class DelayedAttackTag extends ArenaTag {
     const ret = super.lapse(arena);
 
     if (!ret) {
+      // TODO: This should not add to move history (for Spite)
       globalScene.phaseManager.unshiftNew(
         "MoveEffectPhase",
         this.sourceId!,
         [this.targetIndex],
         allMoves[this.sourceMove!],
-        false,
-        true,
+        MoveUseMode.FOLLOW_UP,
       ); // TODO: are those bangs correct?
     }
 
@@ -953,7 +946,7 @@ class StealthRockTag extends ArenaTrapTag {
 
   override activateTrap(pokemon: Pokemon, simulated: boolean): boolean {
     const cancelled = new BooleanHolder(false);
-    applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
+    applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
     if (cancelled.value) {
       return false;
     }
@@ -1010,7 +1003,7 @@ class StickyWebTag extends ArenaTrapTag {
   override activateTrap(pokemon: Pokemon, simulated: boolean): boolean {
     if (pokemon.isGrounded()) {
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs(ProtectStatAbAttr, pokemon, cancelled);
+      applyAbAttrs("ProtectStatAbAttr", pokemon, cancelled);
 
       if (simulated) {
         return !cancelled.value;
@@ -1442,8 +1435,8 @@ export class SuppressAbilitiesTag extends ArenaTag {
       // Could have a custom message that plays when a specific pokemon's NG ends? This entire thing exists due to passives after all
       const setter = globalScene
         .getField()
-        .filter(p => p?.hasAbilityWithAttr(PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr, false))[0];
-      applyOnGainAbAttrs(setter, setter.getAbility().hasAttr(PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr));
+        .filter(p => p?.hasAbilityWithAttr("PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr", false))[0];
+      applyOnGainAbAttrs(setter, setter.getAbility().hasAttr("PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr"));
     }
   }
 
@@ -1455,7 +1448,7 @@ export class SuppressAbilitiesTag extends ArenaTag {
 
     for (const pokemon of globalScene.getField(true)) {
       // There is only one pokemon with this attr on the field on removal, so its abilities are already active
-      if (pokemon && !pokemon.hasAbilityWithAttr(PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr, false)) {
+      if (pokemon && !pokemon.hasAbilityWithAttr("PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr", false)) {
         [true, false].forEach(passive => applyOnGainAbAttrs(pokemon, passive));
       }
     }

src/data/balance/tms.ts

@@ -1,4 +1,4 @@
-import { ModifierTier } from "#app/modifier/modifier-tier";
+import { ModifierTier } from "#enums/modifier-tier";
 import { MoveId } from "#enums/move-id";
 import { SpeciesId } from "#enums/species-id";
 

src/data/battle-anims.ts

@@ -1,15 +1,22 @@
 import { globalScene } from "#app/global-scene";
-import { allMoves } from "./data-lists";
+import { allMoves } from "#app/data/data-lists";
 import { MoveFlags } from "#enums/MoveFlags";
-import type Pokemon from "../field/pokemon";
-import { type nil, getFrameMs, getEnumKeys, getEnumValues, animationFileName } from "../utils/common";
+import type Pokemon from "#app/field/pokemon";
+import {
+  type nil,
+  getFrameMs,
+  getEnumKeys,
+  getEnumValues,
+  animationFileName,
+  coerceArray,
+  isNullOrUndefined,
+} from "#app/utils/common";
 import type { BattlerIndex } from "#enums/battler-index";
 import { MoveId } from "#enums/move-id";
-import { SubstituteTag } from "./battler-tags";
-import { isNullOrUndefined } from "../utils/common";
 import Phaser from "phaser";
 import { EncounterAnim } from "#enums/encounter-anims";
 import { AnimBlendType, AnimFrameTarget, AnimFocus, ChargeAnim, CommonAnim } from "#enums/move-anims-common";
+import { BattlerTagType } from "#enums/battler-tag-type";
 
 export class AnimConfig {
   public id: number;
@@ -519,7 +526,7 @@ function logMissingMoveAnim(move: MoveId, ...optionalParams: any[]) {
  * @param encounterAnim one or more animations to fetch
  */
 export async function initEncounterAnims(encounterAnim: EncounterAnim | EncounterAnim[]): Promise<void> {
-  const anims = Array.isArray(encounterAnim) ? encounterAnim : [encounterAnim];
+  const anims = coerceArray(encounterAnim);
   const encounterAnimNames = getEnumKeys(EncounterAnim);
   const encounterAnimFetches: Promise<Map<EncounterAnim, AnimConfig>>[] = [];
   for (const anim of anims) {
@@ -770,7 +777,7 @@ export abstract class BattleAnim {
     const user = !isOppAnim ? this.user : this.target;
     const target = !isOppAnim ? this.target : this.user;
 
-    const targetSubstitute = onSubstitute && user !== target ? target!.getTag(SubstituteTag) : null;
+    const targetSubstitute = onSubstitute && user !== target ? target!.getTag(BattlerTagType.SUBSTITUTE) : null;
 
     const userInitialX = user!.x; // TODO: is this bang correct?
     const userInitialY = user!.y; // TODO: is this bang correct?
@@ -844,7 +851,7 @@ export abstract class BattleAnim {
       return;
     }
 
-    const targetSubstitute = !!onSubstitute && user !== target ? target.getTag(SubstituteTag) : null;
+    const targetSubstitute = !!onSubstitute && user !== target ? target.getTag(BattlerTagType.SUBSTITUTE) : null;
 
     const userSprite = user.getSprite();
     const targetSprite = targetSubstitute?.sprite ?? target.getSprite();

src/data/battler-tags.ts

@@ -1,13 +1,6 @@
 import { globalScene } from "#app/global-scene";
 import Overrides from "#app/overrides";
-import {
-  applyAbAttrs,
-  BlockNonDirectDamageAbAttr,
-  FlinchEffectAbAttr,
-  ProtectStatAbAttr,
-  ConditionalUserFieldProtectStatAbAttr,
-  ReverseDrainAbAttr,
-} from "#app/data/abilities/ability";
+import { applyAbAttrs } from "./abilities/apply-ab-attrs";
 import { allAbilities } from "./data-lists";
 import { CommonBattleAnim, MoveChargeAnim } from "#app/data/battle-anims";
 import { ChargeAnim, CommonAnim } from "#enums/move-anims-common";
@@ -28,7 +21,7 @@ import type { MoveEffectPhase } from "#app/phases/move-effect-phase";
 import type { MovePhase } from "#app/phases/move-phase";
 import type { StatStageChangeCallback } from "#app/phases/stat-stage-change-phase";
 import i18next from "#app/plugins/i18n";
-import { BooleanHolder, getFrameMs, NumberHolder, toDmgValue } from "#app/utils/common";
+import { BooleanHolder, coerceArray, getFrameMs, NumberHolder, toDmgValue } from "#app/utils/common";
 import { AbilityId } from "#enums/ability-id";
 import { BattlerTagType } from "#enums/battler-tag-type";
 import { MoveId } from "#enums/move-id";
@@ -38,8 +31,15 @@ import { EFFECTIVE_STATS, getStatKey, Stat, type BattleStat, type EffectiveStat
 import { StatusEffect } from "#enums/status-effect";
 import { WeatherType } from "#enums/weather-type";
 import { isNullOrUndefined } from "#app/utils/common";
+import { MoveUseMode } from "#enums/move-use-mode";
+import { invalidEncoreMoves } from "./moves/invalid-moves";
 import { BattlerTagLapseType } from "#enums/battler-tag-lapse-type";
 
+/**
+ * A {@linkcode BattlerTag} represents a semi-persistent effect that can be attached to a {@linkcode Pokemon}.
+ * Tags can trigger various effects throughout a turn, and are cleared on switching out
+ * or through their respective {@linkcode BattlerTag.lapse | lapse} methods.
+ */
 export class BattlerTag {
   public tagType: BattlerTagType;
   public lapseTypes: BattlerTagLapseType[];
@@ -57,7 +57,7 @@ export class BattlerTag {
     isBatonPassable = false,
   ) {
     this.tagType = tagType;
-    this.lapseTypes = Array.isArray(lapseType) ? lapseType : [lapseType];
+    this.lapseTypes = coerceArray(lapseType);
     this.turnCount = turnCount;
     this.sourceMove = sourceMove!; // TODO: is this bang correct?
     this.sourceId = sourceId;
@@ -76,7 +76,7 @@ export class BattlerTag {
 
   /**
    * Tick down this {@linkcode BattlerTag}'s duration.
-   * @returns `true` if the tag should be kept (`turnCount` > 0`)
+   * @returns `true` if the tag should be kept (`turnCount > 0`)
    */
   lapse(_pokemon: Pokemon, _lapseType: BattlerTagLapseType): boolean {
     // TODO: Maybe flip this (return `true` if tag needs removal)
@@ -132,16 +132,6 @@ export interface TerrainBattlerTag {
  * Players and enemies should not be allowed to select restricted moves.
  */
 export abstract class MoveRestrictionBattlerTag extends BattlerTag {
-  constructor(
-    tagType: BattlerTagType,
-    lapseType: BattlerTagLapseType | BattlerTagLapseType[],
-    turnCount: number,
-    sourceMove?: MoveId,
-    sourceId?: number,
-  ) {
-    super(tagType, lapseType, turnCount, sourceMove, sourceId);
-  }
-
   /** @override */
   override lapse(pokemon: Pokemon, lapseType: BattlerTagLapseType): boolean {
     if (lapseType === BattlerTagLapseType.PRE_MOVE) {
@@ -284,17 +274,18 @@ export class DisabledTag extends MoveRestrictionBattlerTag {
   /**
    * @override
    *
-   * Ensures that move history exists on `pokemon` and has a valid move. If so, sets the {@linkcode moveId} and shows a message.
-   * Otherwise the move ID will not get assigned and this tag will get removed next turn.
+   * Attempt to disable the target's last move by setting this tag's {@linkcode moveId}
+   * and showing a message.
    */
   override onAdd(pokemon: Pokemon): void {
-    super.onAdd(pokemon);
-
-    const move = pokemon.getLastXMoves(-1).find(m => !m.virtual);
-    if (isNullOrUndefined(move) || move.move === MoveId.STRUGGLE || move.move === MoveId.NONE) {
+    // Disable fails against struggle or an empty move history
+    // TODO: Confirm if this is redundant given Disable/Cursed Body's disable conditions
+    const move = pokemon.getLastNonVirtualMove();
+    if (isNullOrUndefined(move) || move.move === MoveId.STRUGGLE) {
       return;
     }
 
+    super.onAdd(pokemon);
     this.moveId = move.move;
 
     globalScene.phaseManager.queueMessage(
@@ -344,7 +335,6 @@ export class DisabledTag extends MoveRestrictionBattlerTag {
 
 /**
  * Tag used by Gorilla Tactics to restrict the user to using only one move.
- * @extends MoveRestrictionBattlerTag
  */
 export class GorillaTacticsTag extends MoveRestrictionBattlerTag {
   private moveId = MoveId.NONE;
@@ -353,34 +343,30 @@ export class GorillaTacticsTag extends MoveRestrictionBattlerTag {
     super(BattlerTagType.GORILLA_TACTICS, BattlerTagLapseType.CUSTOM, 0);
   }
 
-  /** @override */
   override isMoveRestricted(move: MoveId): boolean {
     return move !== this.moveId;
   }
 
   /**
-   * @override
-   * @param {Pokemon} pokemon the {@linkcode Pokemon} to check if the tag can be added
-   * @returns `true` if the pokemon has a valid move and no existing {@linkcode GorillaTacticsTag}; `false` otherwise
+   * Ensures that move history exists on {@linkcode Pokemon} and has a valid move to lock into.
+   * @param pokemon - The {@linkcode Pokemon} to add the tag to
+   * @returns `true` if the tag can be added
    */
   override canAdd(pokemon: Pokemon): boolean {
-    return this.getLastValidMove(pokemon) !== undefined && !pokemon.getTag(GorillaTacticsTag);
+    // Choice items ignore struggle, so Gorilla Tactics should too
+    const lastSelectedMove = pokemon.getLastNonVirtualMove();
+    return !isNullOrUndefined(lastSelectedMove) && lastSelectedMove.move !== MoveId.STRUGGLE;
   }
 
   /**
-   * Ensures that move history exists on {@linkcode Pokemon} and has a valid move.
-   * If so, sets the {@linkcode moveId} and increases the user's Attack by 50%.
-   * @override
-   * @param {Pokemon} pokemon the {@linkcode Pokemon} to add the tag to
+   * Sets this tag's {@linkcode moveId} and increases the user's Attack by 50%.
+   * @param pokemon - The {@linkcode Pokemon} to add the tag to
    */
   override onAdd(pokemon: Pokemon): void {
-    const lastValidMove = this.getLastValidMove(pokemon);
+    super.onAdd(pokemon);
 
-    if (!lastValidMove) {
-      return;
-    }
-
-    this.moveId = lastValidMove;
+    // Bang is justified as tag is not added if prior move doesn't exist
+    this.moveId = pokemon.getLastNonVirtualMove()!.move;
     pokemon.setStat(Stat.ATK, pokemon.getStat(Stat.ATK, false) * 1.5, false);
   }
 
@@ -395,29 +381,16 @@ export class GorillaTacticsTag extends MoveRestrictionBattlerTag {
   }
 
   /**
-   *
-   * @override
-   * @param {Pokemon} pokemon n/a
-   * @param {MoveId} _move {@linkcode MoveId} ID of the move being denied
-   * @returns {string} text to display when the move is denied
+   * Return the text displayed when a move is restricted.
+   * @param pokemon - The {@linkcode Pokemon} with this tag.
+   * @returns A string containing the text to display when the move is denied
    */
-  override selectionDeniedText(pokemon: Pokemon, _move: MoveId): string {
+  override selectionDeniedText(pokemon: Pokemon): string {
     return i18next.t("battle:canOnlyUseMove", {
       moveName: allMoves[this.moveId].name,
       pokemonName: getPokemonNameWithAffix(pokemon),
     });
   }
-
-  /**
-   * Gets the last valid move from the pokemon's move history.
-   * @param {Pokemon} pokemon {@linkcode Pokemon} to get the last valid move from
-   * @returns {MoveId | undefined} the last valid move from the pokemon's move history
-   */
-  getLastValidMove(pokemon: Pokemon): MoveId | undefined {
-    const move = pokemon.getLastXMoves().find(m => m.move !== MoveId.NONE && m.move !== MoveId.STRUGGLE && !m.virtual);
-
-    return move?.move;
-  }
 }
 
 /**
@@ -431,8 +404,8 @@ export class RechargingTag extends BattlerTag {
   onAdd(pokemon: Pokemon): void {
     super.onAdd(pokemon);
 
-    // Queue a placeholder move for the Pokemon to "use" next turn
-    pokemon.getMoveQueue().push({ move: MoveId.NONE, targets: [] });
+    // Queue a placeholder move for the Pokemon to "use" next turn.
+    pokemon.pushMoveQueue({ move: MoveId.NONE, targets: [], useMode: MoveUseMode.NORMAL });
   }
 
   /** Cancels the source's move this turn and queues a "__ must recharge!" message */
@@ -648,7 +621,7 @@ export class FlinchedTag extends BattlerTag {
           pokemonNameWithAffix: getPokemonNameWithAffix(pokemon),
         }),
       );
-      applyAbAttrs(FlinchEffectAbAttr, pokemon, null);
+      applyAbAttrs("FlinchEffectAbAttr", pokemon, null);
       return true;
     }
 
@@ -681,6 +654,7 @@ export class InterruptedTag extends BattlerTag {
       move: MoveId.NONE,
       result: MoveResult.OTHER,
       targets: [],
+      useMode: MoveUseMode.NORMAL,
     });
   }
 
@@ -946,7 +920,7 @@ export class SeedTag extends BattlerTag {
       const source = pokemon.getOpponents().find(o => o.getBattlerIndex() === this.sourceIndex);
       if (source) {
         const cancelled = new BooleanHolder(false);
-        applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
+        applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
 
         if (!cancelled.value) {
           globalScene.phaseManager.unshiftNew(
@@ -957,7 +931,7 @@ export class SeedTag extends BattlerTag {
           );
 
           const damage = pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 8), { result: HitResult.INDIRECT });
-          const reverseDrain = pokemon.hasAbilityWithAttr(ReverseDrainAbAttr, false);
+          const reverseDrain = pokemon.hasAbilityWithAttr("ReverseDrainAbAttr", false);
           globalScene.phaseManager.unshiftNew(
             "PokemonHealPhase",
             source.getBattlerIndex(),
@@ -1006,43 +980,46 @@ export class PowderTag extends BattlerTag {
   }
 
   /**
-   * Applies Powder's effects before the tag owner uses a Fire-type move.
-   * Also causes the tag to expire at the end of turn.
-   * @param pokemon {@linkcode Pokemon} the owner of this tag
-   * @param lapseType {@linkcode BattlerTagLapseType} the type of lapse functionality to carry out
-   * @returns `true` if the tag should not expire after this lapse; `false` otherwise.
+   * Applies Powder's effects before the tag owner uses a Fire-type move, damaging and canceling its action.
+   * Lasts until the end of the turn.
+   * @param pokemon - The {@linkcode Pokemon} with this tag.
+   * @param lapseType - The {@linkcode BattlerTagLapseType} dictating how this tag is being activated
+   * @returns `true` if the tag should remain active.
    */
   lapse(pokemon: Pokemon, lapseType: BattlerTagLapseType): boolean {
-    if (lapseType === BattlerTagLapseType.PRE_MOVE) {
     const movePhase = globalScene.phaseManager.getCurrentPhase();
-      if (movePhase?.is("MovePhase")) {
+    if (lapseType !== BattlerTagLapseType.PRE_MOVE || !movePhase?.is("MovePhase")) {
+      return false;
+    }
+
     const move = movePhase.move.getMove();
     const weather = globalScene.arena.weather;
     if (
-          pokemon.getMoveType(move) === PokemonType.FIRE &&
-          !(weather && weather.weatherType === WeatherType.HEAVY_RAIN && !weather.isEffectSuppressed())
+      pokemon.getMoveType(move) !== PokemonType.FIRE ||
+      (weather?.weatherType === WeatherType.HEAVY_RAIN && !weather.isEffectSuppressed()) // Heavy rain takes priority over powder
     ) {
-          movePhase.fail();
+      return true;
+    }
+
+    // Disable the target's fire type move and damage it (subject to Magic Guard)
     movePhase.showMoveText();
+    movePhase.fail();
 
     const idx = pokemon.getBattlerIndex();
 
     globalScene.phaseManager.unshiftNew("CommonAnimPhase", idx, idx, CommonAnim.POWDER);
 
     const cancelDamage = new BooleanHolder(false);
-          applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelDamage);
+    applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelDamage);
     if (!cancelDamage.value) {
       pokemon.damageAndUpdate(Math.floor(pokemon.getMaxHp() / 4), { result: HitResult.INDIRECT });
     }
 
     // "When the flame touched the powder\non the Pokémon, it exploded!"
     globalScene.phaseManager.queueMessage(i18next.t("battlerTags:powderLapse", { moveName: move.name }));
-        }
-      }
+
     return true;
   }
-    return super.lapse(pokemon, lapseType);
-  }
 }
 
 export class NightmareTag extends BattlerTag {
@@ -1083,7 +1060,7 @@ export class NightmareTag extends BattlerTag {
       phaseManager.unshiftNew("CommonAnimPhase", pokemon.getBattlerIndex(), undefined, CommonAnim.CURSE); // TODO: Update animation type
 
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
+      applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
 
       if (!cancelled.value) {
         pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 4), { result: HitResult.INDIRECT });
@@ -1136,34 +1113,22 @@ export class EncoreTag extends MoveRestrictionBattlerTag {
   }
 
   canAdd(pokemon: Pokemon): boolean {
-    const lastMoves = pokemon.getLastXMoves(1);
-    if (!lastMoves.length) {
+    const lastMove = pokemon.getLastNonVirtualMove();
+    if (!lastMove) {
       return false;
     }
 
-    const repeatableMove = lastMoves[0];
-
-    if (!repeatableMove.move || repeatableMove.virtual) {
+    if (invalidEncoreMoves.has(lastMove.move)) {
       return false;
     }
 
-    switch (repeatableMove.move) {
-      case MoveId.MIMIC:
-      case MoveId.MIRROR_MOVE:
-      case MoveId.TRANSFORM:
-      case MoveId.STRUGGLE:
-      case MoveId.SKETCH:
-      case MoveId.SLEEP_TALK:
-      case MoveId.ENCORE:
-        return false;
-    }
-
-    this.moveId = repeatableMove.move;
+    this.moveId = lastMove.move;
 
     return true;
   }
 
   onAdd(pokemon: Pokemon): void {
+    // TODO: shouldn't this be `onAdd`?
     super.onRemove(pokemon);
 
     globalScene.phaseManager.queueMessage(
@@ -1179,7 +1144,13 @@ export class EncoreTag extends MoveRestrictionBattlerTag {
         const lastMove = pokemon.getLastXMoves(1)[0];
         globalScene.phaseManager.tryReplacePhase(
           m => m.is("MovePhase") && m.pokemon === pokemon,
-          globalScene.phaseManager.create("MovePhase", pokemon, lastMove.targets ?? [], movesetMove),
+          globalScene.phaseManager.create(
+            "MovePhase",
+            pokemon,
+            lastMove.targets ?? [],
+            movesetMove,
+            MoveUseMode.NORMAL,
+          ),
         );
       }
     }
@@ -1442,7 +1413,7 @@ export abstract class DamagingTrapTag extends TrappedTag {
       phaseManager.unshiftNew("CommonAnimPhase", pokemon.getBattlerIndex(), undefined, this.commonAnim);
 
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
+      applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
 
       if (!cancelled.value) {
         pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 8), { result: HitResult.INDIRECT });
@@ -1481,16 +1452,6 @@ export class WrapTag extends DamagingTrapTag {
 }
 
 export abstract class VortexTrapTag extends DamagingTrapTag {
-  constructor(
-    tagType: BattlerTagType,
-    commonAnim: CommonAnim,
-    turnCount: number,
-    sourceMove: MoveId,
-    sourceId: number,
-  ) {
-    super(tagType, commonAnim, turnCount, sourceMove, sourceId);
-  }
-
   getTrapMessage(pokemon: Pokemon): string {
     return i18next.t("battlerTags:vortexOnTrap", {
       pokemonNameWithAffix: getPokemonNameWithAffix(pokemon),
@@ -1685,7 +1646,7 @@ export class ContactDamageProtectedTag extends ContactProtectedTag {
    */
   override onContact(attacker: Pokemon, user: Pokemon): void {
     const cancelled = new BooleanHolder(false);
-    applyAbAttrs(BlockNonDirectDamageAbAttr, user, cancelled);
+    applyAbAttrs("BlockNonDirectDamageAbAttr", user, cancelled);
     if (!cancelled.value) {
       attacker.damageAndUpdate(toDmgValue(attacker.getMaxHp() * (1 / this.damageRatio)), {
         result: HitResult.INDIRECT,
@@ -1915,13 +1876,19 @@ export class TruantTag extends AbilityBattlerTag {
 
   lapse(pokemon: Pokemon, lapseType: BattlerTagLapseType): boolean {
     if (!pokemon.hasAbility(AbilityId.TRUANT)) {
+      // remove tag if mon lacks ability
       return super.lapse(pokemon, lapseType);
     }
+
+    const lastMove = pokemon.getLastXMoves()[0];
+
+    if (!lastMove) {
+      // Don't interrupt move if last move was `Moves.NONE` OR no prior move was found
+      return true;
+    }
+
+    // Interrupt move usage in favor of slacking off
     const passive = pokemon.getAbility().id !== AbilityId.TRUANT;
-
-    const lastMove = pokemon.getLastXMoves().find(() => true);
-
-    if (lastMove && lastMove.move !== MoveId.NONE) {
     (globalScene.phaseManager.getCurrentPhase() as MovePhase).cancel();
     // TODO: Ability displays should be handled by the ability
     globalScene.phaseManager.queueAbilityDisplay(pokemon, passive, true);
@@ -1931,7 +1898,6 @@ export class TruantTag extends AbilityBattlerTag {
       }),
     );
     globalScene.phaseManager.queueAbilityDisplay(pokemon, passive, false);
-    }
 
     return true;
   }
@@ -2281,7 +2247,7 @@ export class SaltCuredTag extends BattlerTag {
       );
 
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
+      applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
 
       if (!cancelled.value) {
         const pokemonSteelOrWater = pokemon.isOfType(PokemonType.STEEL) || pokemon.isOfType(PokemonType.WATER);
@@ -2335,7 +2301,7 @@ export class CursedTag extends BattlerTag {
       );
 
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
+      applyAbAttrs("BlockNonDirectDamageAbAttr", pokemon, cancelled);
 
       if (!cancelled.value) {
         pokemon.damageAndUpdate(toDmgValue(pokemon.getMaxHp() / 4), { result: HitResult.INDIRECT });
@@ -2670,7 +2636,7 @@ export class GulpMissileTag extends BattlerTag {
       }
 
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs(BlockNonDirectDamageAbAttr, attacker, cancelled);
+      applyAbAttrs("BlockNonDirectDamageAbAttr", attacker, cancelled);
 
       if (!cancelled.value) {
         attacker.damageAndUpdate(Math.max(1, Math.floor(attacker.getMaxHp() / 4)), { result: HitResult.INDIRECT });
@@ -3060,8 +3026,8 @@ export class MysteryEncounterPostSummonTag extends BattlerTag {
 
     if (lapseType === BattlerTagLapseType.CUSTOM) {
       const cancelled = new BooleanHolder(false);
-      applyAbAttrs(ProtectStatAbAttr, pokemon, cancelled);
-      applyAbAttrs(ConditionalUserFieldProtectStatAbAttr, pokemon, cancelled, false, pokemon);
+      applyAbAttrs("ProtectStatAbAttr", pokemon, cancelled);
+      applyAbAttrs("ConditionalUserFieldProtectStatAbAttr", pokemon, cancelled, false, pokemon);
       if (!cancelled.value) {
         if (pokemon.mysteryEncounterBattleEffects) {
           pokemon.mysteryEncounterBattleEffects(pokemon);

src/data/berry.ts

@@ -3,7 +3,7 @@ import type Pokemon from "../field/pokemon";
 import { HitResult } from "#enums/hit-result";
 import { getStatusEffectHealText } from "./status-effect";
 import { NumberHolder, toDmgValue, randSeedInt } from "#app/utils/common";
-import { DoubleBerryEffectAbAttr, ReduceBerryUseThresholdAbAttr, applyAbAttrs } from "./abilities/ability";
+import { applyAbAttrs } from "./abilities/apply-ab-attrs";
 import i18next from "i18next";
 import { BattlerTagType } from "#enums/battler-tag-type";
 import { BerryType } from "#enums/berry-type";
@@ -38,25 +38,25 @@ export function getBerryPredicate(berryType: BerryType): BerryPredicate {
         const threshold = new NumberHolder(0.25);
         // Offset BerryType such that LIECHI -> Stat.ATK = 1, GANLON -> Stat.DEF = 2, so on and so forth
         const stat: BattleStat = berryType - BerryType.ENIGMA;
-        applyAbAttrs(ReduceBerryUseThresholdAbAttr, pokemon, null, false, threshold);
+        applyAbAttrs("ReduceBerryUseThresholdAbAttr", pokemon, null, false, threshold);
         return pokemon.getHpRatio() < threshold.value && pokemon.getStatStage(stat) < 6;
       };
     case BerryType.LANSAT:
       return (pokemon: Pokemon) => {
         const threshold = new NumberHolder(0.25);
-        applyAbAttrs(ReduceBerryUseThresholdAbAttr, pokemon, null, false, threshold);
+        applyAbAttrs("ReduceBerryUseThresholdAbAttr", pokemon, null, false, threshold);
         return pokemon.getHpRatio() < 0.25 && !pokemon.getTag(BattlerTagType.CRIT_BOOST);
       };
     case BerryType.STARF:
       return (pokemon: Pokemon) => {
         const threshold = new NumberHolder(0.25);
-        applyAbAttrs(ReduceBerryUseThresholdAbAttr, pokemon, null, false, threshold);
+        applyAbAttrs("ReduceBerryUseThresholdAbAttr", pokemon, null, false, threshold);
         return pokemon.getHpRatio() < 0.25;
       };
     case BerryType.LEPPA:
       return (pokemon: Pokemon) => {
         const threshold = new NumberHolder(0.25);
-        applyAbAttrs(ReduceBerryUseThresholdAbAttr, pokemon, null, false, threshold);
+        applyAbAttrs("ReduceBerryUseThresholdAbAttr", pokemon, null, false, threshold);
         return !!pokemon.getMoveset().find(m => !m.getPpRatio());
       };
   }
@@ -72,7 +72,7 @@ export function getBerryEffectFunc(berryType: BerryType): BerryEffectFunc {
       case BerryType.ENIGMA:
         {
           const hpHealed = new NumberHolder(toDmgValue(consumer.getMaxHp() / 4));
-          applyAbAttrs(DoubleBerryEffectAbAttr, consumer, null, false, hpHealed);
+          applyAbAttrs("DoubleBerryEffectAbAttr", consumer, null, false, hpHealed);
           globalScene.phaseManager.unshiftNew(
             "PokemonHealPhase",
             consumer.getBattlerIndex(),
@@ -105,7 +105,7 @@ export function getBerryEffectFunc(berryType: BerryType): BerryEffectFunc {
           // Offset BerryType such that LIECHI --> Stat.ATK = 1, GANLON --> Stat.DEF = 2, etc etc.
           const stat: BattleStat = berryType - BerryType.ENIGMA;
           const statStages = new NumberHolder(1);
-          applyAbAttrs(DoubleBerryEffectAbAttr, consumer, null, false, statStages);
+          applyAbAttrs("DoubleBerryEffectAbAttr", consumer, null, false, statStages);
           globalScene.phaseManager.unshiftNew(
             "StatStageChangePhase",
             consumer.getBattlerIndex(),
@@ -126,7 +126,7 @@ export function getBerryEffectFunc(berryType: BerryType): BerryEffectFunc {
         {
           const randStat = randSeedInt(Stat.SPD, Stat.ATK);
           const stages = new NumberHolder(2);
-          applyAbAttrs(DoubleBerryEffectAbAttr, consumer, null, false, stages);
+          applyAbAttrs("DoubleBerryEffectAbAttr", consumer, null, false, stages);
           globalScene.phaseManager.unshiftNew(
             "StatStageChangePhase",
             consumer.getBattlerIndex(),

src/data/challenge.ts

@@ -4,7 +4,8 @@ import i18next from "i18next";
 import type { DexAttrProps, GameData } from "#app/system/game-data";
 import { defaultStarterSpecies } from "#app/constants";
 import type PokemonSpecies from "#app/data/pokemon-species";
-import { getPokemonSpecies, getPokemonSpeciesForm } from "#app/data/pokemon-species";
+import { getPokemonSpeciesForm } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { speciesStarterCosts } from "#app/data/balance/starters";
 import type Pokemon from "#app/field/pokemon";
 import { PokemonMove } from "./moves/pokemon-move";
@@ -21,7 +22,7 @@ import { TrainerType } from "#enums/trainer-type";
 import { Nature } from "#enums/nature";
 import type { MoveId } from "#enums/move-id";
 import { TypeColor, TypeShadow } from "#enums/color";
-import { ModifierTier } from "#app/modifier/modifier-tier";
+import { ModifierTier } from "#enums/modifier-tier";
 import { globalScene } from "#app/global-scene";
 import { pokemonFormChanges } from "./pokemon-forms";
 import { pokemonEvolutions } from "./balance/pokemon-evolutions";

src/data/daily-run.ts

@@ -5,7 +5,8 @@ import { PlayerPokemon } from "#app/field/pokemon";
 import type { Starter } from "#app/ui/starter-select-ui-handler";
 import { randSeedGauss, randSeedInt, randSeedItem, getEnumValues } from "#app/utils/common";
 import type { PokemonSpeciesForm } from "#app/data/pokemon-species";
-import PokemonSpecies, { getPokemonSpecies, getPokemonSpeciesForm } from "#app/data/pokemon-species";
+import PokemonSpecies, { getPokemonSpeciesForm } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { speciesStarterCosts } from "#app/data/balance/starters";
 import { pokerogueApi } from "#app/plugins/api/pokerogue-api";
 import { BiomeId } from "#enums/biome-id";

src/data/data-lists.ts

@@ -1,5 +1,11 @@
-import type { Ability } from "./abilities/ability-class";
+import type PokemonSpecies from "#app/data/pokemon-species";
+import type { ModifierTypes } from "#app/modifier/modifier-type";
+import type { Ability } from "./abilities/ability";
 import type Move from "./moves/move";
 
 export const allAbilities: Ability[] = [];
 export const allMoves: Move[] = [];
+export const allSpecies: PokemonSpecies[] = [];
+
+// TODO: Figure out what this is used for and provide an appropriate tsdoc comment
+export const modifierTypes = {} as ModifierTypes;

src/data/dialogue.ts

@@ -1723,49 +1723,6 @@ export const trainerTypeDialogue: TrainerTypeDialogue = {
   ],
 };
 
-export const doubleBattleDialogue = {
-  blue_red_double: {
-    encounter: ["doubleBattleDialogue:blue_red_double.encounter.1"],
-    victory: ["doubleBattleDialogue:blue_red_double.victory.1"],
-  },
-  red_blue_double: {
-    encounter: ["doubleBattleDialogue:red_blue_double.encounter.1"],
-    victory: ["doubleBattleDialogue:red_blue_double.victory.1"],
-  },
-  tate_liza_double: {
-    encounter: ["doubleBattleDialogue:tate_liza_double.encounter.1"],
-    victory: ["doubleBattleDialogue:tate_liza_double.victory.1"],
-  },
-  liza_tate_double: {
-    encounter: ["doubleBattleDialogue:liza_tate_double.encounter.1"],
-    victory: ["doubleBattleDialogue:liza_tate_double.victory.1"],
-  },
-  wallace_steven_double: {
-    encounter: ["doubleBattleDialogue:wallace_steven_double.encounter.1"],
-    victory: ["doubleBattleDialogue:wallace_steven_double.victory.1"],
-  },
-  steven_wallace_double: {
-    encounter: ["doubleBattleDialogue:steven_wallace_double.encounter.1"],
-    victory: ["doubleBattleDialogue:steven_wallace_double.victory.1"],
-  },
-  alder_iris_double: {
-    encounter: ["doubleBattleDialogue:alder_iris_double.encounter.1"],
-    victory: ["doubleBattleDialogue:alder_iris_double.victory.1"],
-  },
-  iris_alder_double: {
-    encounter: ["doubleBattleDialogue:iris_alder_double.encounter.1"],
-    victory: ["doubleBattleDialogue:iris_alder_double.victory.1"],
-  },
-  marnie_piers_double: {
-    encounter: ["doubleBattleDialogue:marnie_piers_double.encounter.1"],
-    victory: ["doubleBattleDialogue:marnie_piers_double.victory.1"],
-  },
-  piers_marnie_double: {
-    encounter: ["doubleBattleDialogue:piers_marnie_double.encounter.1"],
-    victory: ["doubleBattleDialogue:piers_marnie_double.victory.1"],
-  },
-};
-
 export const battleSpecDialogue = {
   [BattleSpec.FINAL_BOSS]: {
     encounter: "battleSpecDialogue:encounter",

src/data/double-battle-dialogue.ts

@@ -0,0 +1,44 @@
+// TODO: Move this back into `dialogue.ts` after finding a suitable way to remove the circular dependencies
+// that caused this to be moved out in the first place
+export const doubleBattleDialogue = {
+  blue_red_double: {
+    encounter: ["doubleBattleDialogue:blue_red_double.encounter.1"],
+    victory: ["doubleBattleDialogue:blue_red_double.victory.1"],
+  },
+  red_blue_double: {
+    encounter: ["doubleBattleDialogue:red_blue_double.encounter.1"],
+    victory: ["doubleBattleDialogue:red_blue_double.victory.1"],
+  },
+  tate_liza_double: {
+    encounter: ["doubleBattleDialogue:tate_liza_double.encounter.1"],
+    victory: ["doubleBattleDialogue:tate_liza_double.victory.1"],
+  },
+  liza_tate_double: {
+    encounter: ["doubleBattleDialogue:liza_tate_double.encounter.1"],
+    victory: ["doubleBattleDialogue:liza_tate_double.victory.1"],
+  },
+  wallace_steven_double: {
+    encounter: ["doubleBattleDialogue:wallace_steven_double.encounter.1"],
+    victory: ["doubleBattleDialogue:wallace_steven_double.victory.1"],
+  },
+  steven_wallace_double: {
+    encounter: ["doubleBattleDialogue:steven_wallace_double.encounter.1"],
+    victory: ["doubleBattleDialogue:steven_wallace_double.victory.1"],
+  },
+  alder_iris_double: {
+    encounter: ["doubleBattleDialogue:alder_iris_double.encounter.1"],
+    victory: ["doubleBattleDialogue:alder_iris_double.victory.1"],
+  },
+  iris_alder_double: {
+    encounter: ["doubleBattleDialogue:iris_alder_double.encounter.1"],
+    victory: ["doubleBattleDialogue:iris_alder_double.victory.1"],
+  },
+  marnie_piers_double: {
+    encounter: ["doubleBattleDialogue:marnie_piers_double.encounter.1"],
+    victory: ["doubleBattleDialogue:marnie_piers_double.victory.1"],
+  },
+  piers_marnie_double: {
+    encounter: ["doubleBattleDialogue:piers_marnie_double.encounter.1"],
+    victory: ["doubleBattleDialogue:piers_marnie_double.victory.1"],
+  },
+};

src/data/egg.ts

@@ -1,7 +1,7 @@
 import type BattleScene from "#app/battle-scene";
 import { globalScene } from "#app/global-scene";
 import type PokemonSpecies from "#app/data/pokemon-species";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { speciesStarterCosts } from "#app/data/balance/starters";
 import { VariantTier } from "#enums/variant-tier";
 import { randInt, randomString, randSeedInt, getIvsFromId } from "#app/utils/common";

src/data/moves/invalid-moves.ts

@@ -1,6 +1,6 @@
 import { MoveId } from "#enums/move-id";
 
-/** Set of moves that cannot be called by {@linkcode MoveId.METRONOME Metronome} */
+/** Set of moves that cannot be called by {@linkcode MoveId.METRONOME | Metronome}. */
 export const invalidMetronomeMoves: ReadonlySet<MoveId> = new Set([
   MoveId.AFTER_YOU,
   MoveId.ASSIST,
@@ -255,3 +255,28 @@ export const noAbilityTypeOverrideMoves: ReadonlySet<MoveId> = new Set([
   MoveId.TECHNO_BLAST,
   MoveId.HIDDEN_POWER,
 ]);
+
+/** Set of all moves that cannot be copied by {@linkcode Moves.SKETCH}. */
+export const invalidSketchMoves: ReadonlySet<MoveId> = new Set([
+  MoveId.NONE,
+  MoveId.CHATTER,
+  MoveId.MIRROR_MOVE,
+  MoveId.SLEEP_TALK,
+  MoveId.STRUGGLE,
+  MoveId.SKETCH,
+  MoveId.REVIVAL_BLESSING,
+  MoveId.TERA_STARSTORM,
+  MoveId.BREAKNECK_BLITZ__PHYSICAL,
+  MoveId.BREAKNECK_BLITZ__SPECIAL,
+]);
+
+/** Set of all moves that cannot be locked into by {@linkcode Moves.ENCORE}. */
+export const invalidEncoreMoves: ReadonlySet<MoveId> = new Set([
+  MoveId.MIMIC,
+  MoveId.MIRROR_MOVE,
+  MoveId.TRANSFORM,
+  MoveId.STRUGGLE,
+  MoveId.SKETCH,
+  MoveId.SLEEP_TALK,
+  MoveId.ENCORE,
+]);

src/data/moves/pokemon-move.ts

@@ -21,7 +21,6 @@ export class PokemonMove {
   public moveId: MoveId;
   public ppUsed: number;
   public ppUp: number;
-  public virtual: boolean;
 
   /**
    * If defined and nonzero, overrides the maximum PP of the move (e.g., due to move being copied by Transform).
@@ -29,11 +28,10 @@ export class PokemonMove {
    */
   public maxPpOverride?: number;
 
-  constructor(moveId: MoveId, ppUsed = 0, ppUp = 0, virtual = false, maxPpOverride?: number) {
+  constructor(moveId: MoveId, ppUsed = 0, ppUp = 0, maxPpOverride?: number) {
     this.moveId = moveId;
     this.ppUsed = ppUsed;
     this.ppUp = ppUp;
-    this.virtual = virtual;
     this.maxPpOverride = maxPpOverride;
   }
 
@@ -47,6 +45,7 @@ export class PokemonMove {
    * @returns `true` if the move can be selected and used by the Pokemon, otherwise `false`.
    */
   isUsable(pokemon: Pokemon, ignorePp = false, ignoreRestrictionTags = false): boolean {
+    // TODO: Add Sky Drop's 1 turn stall
     if (this.moveId && !ignoreRestrictionTags && pokemon.isMoveRestricted(this.moveId, pokemon)) {
       return false;
     }
@@ -88,6 +87,6 @@ export class PokemonMove {
    * @returns A valid {@linkcode PokemonMove} object
    */
   static loadMove(source: PokemonMove | any): PokemonMove {
-    return new PokemonMove(source.moveId, source.ppUsed, source.ppUp, source.virtual, source.maxPpOverride);
+    return new PokemonMove(source.moveId, source.ppUsed, source.ppUp, source.maxPpOverride);
   }
 }

src/data/mystery-encounters/encounters/a-trainers-test-encounter.ts

@@ -19,8 +19,8 @@ import i18next from "i18next";
 import type { IEggOptions } from "#app/data/egg";
 import { EggSourceType } from "#enums/egg-source-types";
 import { EggTier } from "#enums/egg-type";
-import { ModifierTier } from "#app/modifier/modifier-tier";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { ModifierTier } from "#enums/modifier-tier";
+import { modifierTypes } from "#app/data/data-lists";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
 
 /** the i18n namespace for the encounter */

src/data/mystery-encounters/encounters/absolute-avarice-encounter.ts

@@ -10,7 +10,7 @@ import type Pokemon from "#app/field/pokemon";
 import { EnemyPokemon } from "#app/field/pokemon";
 import { PokemonMove } from "#app/data/moves/pokemon-move";
 import type { BerryModifierType, PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { SpeciesId } from "#enums/species-id";
 import { globalScene } from "#app/global-scene";
@@ -22,7 +22,7 @@ import { queueEncounterMessage } from "#app/data/mystery-encounters/utils/encoun
 import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";
 import { BerryModifier, PokemonInstantReviveModifier } from "#app/modifier/modifier";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { MoveId } from "#enums/move-id";
 import { BattlerTagType } from "#enums/battler-tag-type";
 import { randInt } from "#app/utils/common";
@@ -38,6 +38,7 @@ import type HeldModifierConfig from "#app/@types/held-modifier-config";
 import type { BerryType } from "#enums/berry-type";
 import { Stat } from "#enums/stat";
 import i18next from "i18next";
+import { MoveUseMode } from "#enums/move-use-mode";
 
 /** the i18n namespace for this encounter */
 const namespace = "mysteryEncounters/absoluteAvarice";
@@ -307,7 +308,7 @@ export const AbsoluteAvariceEncounter: MysteryEncounter = MysteryEncounterBuilde
           sourceBattlerIndex: BattlerIndex.ENEMY,
           targets: [BattlerIndex.ENEMY],
           move: new PokemonMove(MoveId.STUFF_CHEEKS),
-          ignorePp: true,
+          useMode: MoveUseMode.IGNORE_PP,
         });
 
         await transitionMysteryEncounterIntroVisuals(true, true, 500);

src/data/mystery-encounters/encounters/an-offer-you-cant-refuse-encounter.ts

@@ -4,7 +4,7 @@ import {
   setEncounterExp,
   updatePlayerMoney,
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { SpeciesId } from "#enums/species-id";
 import { globalScene } from "#app/global-scene";
@@ -18,7 +18,7 @@ import {
 } from "#app/data/mystery-encounters/mystery-encounter-requirements";
 import { getHighestStatTotalPlayerPokemon } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
 import { EXTORTION_ABILITIES, EXTORTION_MOVES } from "#app/data/mystery-encounters/requirements/requirement-groups";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { speciesStarterCosts } from "#app/data/balance/starters";
 import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";

src/data/mystery-encounters/encounters/berries-abound-encounter.ts

@@ -12,7 +12,9 @@ import {
 import type { PlayerPokemon } from "#app/field/pokemon";
 import type Pokemon from "#app/field/pokemon";
 import type { BerryModifierType, ModifierTypeOption } from "#app/modifier/modifier-type";
-import { ModifierPoolType, modifierTypes, regenerateModifierPoolThresholds } from "#app/modifier/modifier-type";
+import { regenerateModifierPoolThresholds } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
+import { ModifierPoolType } from "#enums/modifier-pool-type";
 import { randSeedInt } from "#app/utils/common";
 import { BattlerTagType } from "#enums/battler-tag-type";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";

src/data/mystery-encounters/encounters/bug-type-superfan-encounter.ts

@@ -38,7 +38,7 @@ import {
 } from "#app/data/mystery-encounters/mystery-encounter-requirements";
 import { PokemonType } from "#enums/pokemon-type";
 import type { AttackTypeBoosterModifierType, ModifierTypeOption } from "#app/modifier/modifier-type";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import type { PokemonHeldItemModifier } from "#app/modifier/modifier";
 import {
   AttackTypeBoosterModifier,
@@ -50,7 +50,7 @@ import {
 import i18next from "i18next";
 import MoveInfoOverlay from "#app/ui/move-info-overlay";
 import { allMoves } from "#app/data/data-lists";
-import { ModifierTier } from "#app/modifier/modifier-tier";
+import { ModifierTier } from "#enums/modifier-tier";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
 import { getSpriteKeysFromSpecies } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
 

src/data/mystery-encounters/encounters/clowning-around-encounter.ts

@@ -11,9 +11,9 @@ import {
 import { trainerConfigs } from "#app/data/trainers/trainer-config";
 import { TrainerPartyCompoundTemplate } from "#app/data/trainers/TrainerPartyTemplate";
 import { TrainerPartyTemplate } from "#app/data/trainers/TrainerPartyTemplate";
-import { ModifierTier } from "#app/modifier/modifier-tier";
+import { ModifierTier } from "#enums/modifier-tier";
 import type { PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
-import { ModifierPoolType, modifierTypes } from "#app/modifier/modifier-type";
+import { ModifierPoolType } from "#enums/modifier-pool-type";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { PartyMemberStrength } from "#enums/party-member-strength";
 import { globalScene } from "#app/global-scene";
@@ -22,7 +22,7 @@ import { MysteryEncounterBuilder } from "#app/data/mystery-encounters/mystery-en
 import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 import { SpeciesId } from "#enums/species-id";
 import { TrainerType } from "#enums/trainer-type";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { AbilityId } from "#enums/ability-id";
 import {
   applyAbilityOverrideToPokemon,
@@ -38,7 +38,6 @@ import i18next from "i18next";
 import type { OptionSelectConfig } from "#app/ui/abstact-option-select-ui-handler";
 import type { PlayerPokemon } from "#app/field/pokemon";
 import { PokemonMove } from "#app/data/moves/pokemon-move";
-import { Ability } from "#app/data/abilities/ability-class";
 import { BerryModifier } from "#app/modifier/modifier";
 import { BerryType } from "#enums/berry-type";
 import { BattlerIndex } from "#enums/battler-index";
@@ -49,6 +48,8 @@ import { CustomPokemonData } from "#app/data/custom-pokemon-data";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
 import { EncounterAnim } from "#enums/encounter-anims";
 import { Challenges } from "#enums/challenges";
+import { MoveUseMode } from "#enums/move-use-mode";
+import { allAbilities, modifierTypes } from "#app/data/data-lists";
 
 /** the i18n namespace for the encounter */
 const namespace = "mysteryEncounters/clowningAround";
@@ -139,7 +140,7 @@ export const ClowningAroundEncounter: MysteryEncounter = MysteryEncounterBuilder
 
     // Generate random ability for Blacephalon from pool
     const ability = RANDOM_ABILITY_POOL[randSeedInt(RANDOM_ABILITY_POOL.length)];
-    encounter.setDialogueToken("ability", new Ability(ability, 3).name);
+    encounter.setDialogueToken("ability", allAbilities[ability].name);
     encounter.misc = { ability };
 
     // Decide the random types for Blacephalon. They should not be the same.
@@ -209,19 +210,19 @@ export const ClowningAroundEncounter: MysteryEncounter = MysteryEncounterBuilder
             sourceBattlerIndex: BattlerIndex.ENEMY,
             targets: [BattlerIndex.ENEMY_2],
             move: new PokemonMove(MoveId.ROLE_PLAY),
-            ignorePp: true,
+            useMode: MoveUseMode.IGNORE_PP,
           },
           {
             sourceBattlerIndex: BattlerIndex.ENEMY_2,
             targets: [BattlerIndex.PLAYER],
             move: new PokemonMove(MoveId.TAUNT),
-            ignorePp: true,
+            useMode: MoveUseMode.IGNORE_PP,
           },
           {
             sourceBattlerIndex: BattlerIndex.ENEMY_2,
             targets: [BattlerIndex.PLAYER_2],
             move: new PokemonMove(MoveId.TAUNT),
-            ignorePp: true,
+            useMode: MoveUseMode.IGNORE_PP,
           },
         );
 

src/data/mystery-encounters/encounters/dancing-lessons-encounter.ts

@@ -19,14 +19,14 @@ import {
   getEncounterPokemonLevelForWave,
   STANDARD_ENCOUNTER_BOOSTED_LEVEL_MODIFIER,
 } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { TrainerSlot } from "#enums/trainer-slot";
 import type { PlayerPokemon } from "#app/field/pokemon";
 import type Pokemon from "#app/field/pokemon";
 import { EnemyPokemon } from "#app/field/pokemon";
 import { PokemonMove } from "#app/data/moves/pokemon-move";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import PokemonData from "#app/system/pokemon-data";
 import type { OptionSelectItem } from "#app/ui/abstact-option-select-ui-handler";
 import { BattlerTagType } from "#enums/battler-tag-type";
@@ -40,6 +40,7 @@ import { PokeballType } from "#enums/pokeball";
 import { SpeciesId } from "#enums/species-id";
 import { Stat } from "#enums/stat";
 import i18next from "i18next";
+import { MoveUseMode } from "#enums/move-use-mode";
 
 /** the i18n namespace for this encounter */
 const namespace = "mysteryEncounters/dancingLessons";
@@ -214,7 +215,7 @@ export const DancingLessonsEncounter: MysteryEncounter = MysteryEncounterBuilder
           sourceBattlerIndex: BattlerIndex.ENEMY,
           targets: [BattlerIndex.PLAYER],
           move: new PokemonMove(MoveId.REVELATION_DANCE),
-          ignorePp: true,
+          useMode: MoveUseMode.IGNORE_PP,
         });
 
         await hideOricorioPokemon();

src/data/mystery-encounters/encounters/dark-deal-encounter.ts

@@ -3,8 +3,8 @@ import { isNullOrUndefined, randSeedInt } from "#app/utils/common";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { SpeciesId } from "#enums/species-id";
 import { globalScene } from "#app/global-scene";
-import { modifierTypes } from "#app/modifier/modifier-type";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { modifierTypes } from "#app/data/data-lists";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import type MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";
 import { MysteryEncounterBuilder } from "#app/data/mystery-encounters/mystery-encounter";
 import { MysteryEncounterOptionBuilder } from "#app/data/mystery-encounters/mystery-encounter-option";

src/data/mystery-encounters/encounters/delibirdy-encounter.ts

@@ -15,7 +15,7 @@ import {
   updatePlayerMoney,
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import { applyModifierTypeToPlayerPokemon } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import type { PlayerPokemon } from "#app/field/pokemon";
 import type Pokemon from "#app/field/pokemon";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
@@ -28,7 +28,7 @@ import {
   PreserveBerryModifier,
 } from "#app/modifier/modifier";
 import type { PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import i18next from "#app/plugins/i18n";
 import type { OptionSelectItem } from "#app/ui/abstact-option-select-ui-handler";
 import { randSeedItem } from "#app/utils/common";

src/data/mystery-encounters/encounters/department-store-sale-encounter.ts

@@ -2,8 +2,8 @@ import {
   leaveEncounterWithoutBattle,
   setEncounterRewards,
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
-import type { ModifierTypeFunc } from "#app/modifier/modifier-type";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import type { ModifierTypeFunc } from "#app/@types/modifier-types";
+import { modifierTypes } from "#app/data/data-lists";
 import { randSeedInt } from "#app/utils/common";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { SpeciesId } from "#enums/species-id";

src/data/mystery-encounters/encounters/field-trip-encounter.ts

@@ -9,7 +9,7 @@ import {
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import type { PlayerPokemon } from "#app/field/pokemon";
 import type { PokemonMove } from "#app/data/moves/pokemon-move";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import type { OptionSelectItem } from "#app/ui/abstact-option-select-ui-handler";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { globalScene } from "#app/global-scene";

src/data/mystery-encounters/encounters/fiery-fallout-encounter.ts

@@ -10,7 +10,6 @@ import {
   generateModifierType,
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import type { AttackTypeBoosterModifierType } from "#app/modifier/modifier-type";
-import { modifierTypes } from "#app/modifier/modifier-type";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { globalScene } from "#app/global-scene";
 import type MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";
@@ -21,7 +20,7 @@ import {
   TypeRequirement,
 } from "#app/data/mystery-encounters/mystery-encounter-requirements";
 import { SpeciesId } from "#enums/species-id";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { Gender } from "#app/data/gender";
 import { PokemonType } from "#enums/pokemon-type";
 import { BattlerIndex } from "#enums/battler-index";
@@ -45,8 +44,9 @@ import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
 import { AbilityId } from "#enums/ability-id";
 import { BattlerTagType } from "#enums/battler-tag-type";
 import { Stat } from "#enums/stat";
-import { Ability } from "#app/data/abilities/ability-class";
 import { FIRE_RESISTANT_ABILITIES } from "#app/data/mystery-encounters/requirements/requirement-groups";
+import { MoveUseMode } from "#enums/move-use-mode";
+import { allAbilities, modifierTypes } from "#app/data/data-lists";
 
 /** the i18n namespace for the encounter */
 const namespace = "mysteryEncounters/fieryFallout";
@@ -201,13 +201,13 @@ export const FieryFalloutEncounter: MysteryEncounter = MysteryEncounterBuilder.w
           sourceBattlerIndex: BattlerIndex.ENEMY,
           targets: [BattlerIndex.PLAYER],
           move: new PokemonMove(MoveId.FIRE_SPIN),
-          ignorePp: true,
+          useMode: MoveUseMode.IGNORE_PP,
         },
         {
           sourceBattlerIndex: BattlerIndex.ENEMY_2,
           targets: [BattlerIndex.PLAYER_2],
           move: new PokemonMove(MoveId.FIRE_SPIN),
-          ignorePp: true,
+          useMode: MoveUseMode.IGNORE_PP,
         },
       );
       await initBattleWithEnemyConfig(globalScene.currentBattle.mysteryEncounter!.enemyPartyConfigs[0]);
@@ -246,7 +246,7 @@ export const FieryFalloutEncounter: MysteryEncounter = MysteryEncounterBuilder.w
         if (chosenPokemon.trySetStatus(StatusEffect.BURN)) {
           // Burn applied
           encounter.setDialogueToken("burnedPokemon", chosenPokemon.getNameToRender());
-          encounter.setDialogueToken("abilityName", new Ability(AbilityId.HEATPROOF, 3).name);
+          encounter.setDialogueToken("abilityName", allAbilities[AbilityId.HEATPROOF].name);
           queueEncounterMessage(`${namespace}:option.2.target_burned`);
 
           // Also permanently change the burned Pokemon's ability to Heatproof

src/data/mystery-encounters/encounters/fight-or-flight-encounter.ts

@@ -9,13 +9,10 @@ import {
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import { STEALING_MOVES } from "#app/data/mystery-encounters/requirements/requirement-groups";
 import type Pokemon from "#app/field/pokemon";
-import { ModifierTier } from "#app/modifier/modifier-tier";
+import { ModifierTier } from "#enums/modifier-tier";
 import type { ModifierTypeOption } from "#app/modifier/modifier-type";
-import {
-  getPlayerModifierTypeOptions,
-  ModifierPoolType,
-  regenerateModifierPoolThresholds,
-} from "#app/modifier/modifier-type";
+import { getPlayerModifierTypeOptions, regenerateModifierPoolThresholds } from "#app/modifier/modifier-type";
+import { ModifierPoolType } from "#enums/modifier-pool-type";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { globalScene } from "#app/global-scene";
 import type MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";

src/data/mystery-encounters/encounters/fun-and-games-encounter.ts

@@ -14,7 +14,7 @@ import { TrainerSlot } from "#enums/trainer-slot";
 import type { PlayerPokemon } from "#app/field/pokemon";
 import type Pokemon from "#app/field/pokemon";
 import { FieldPosition } from "#enums/field-position";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { MoneyRequirement } from "#app/data/mystery-encounters/mystery-encounter-requirements";
 import { queueEncounterMessage, showEncounterText } from "#app/data/mystery-encounters/utils/encounter-dialogue-utils";
 import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
@@ -26,7 +26,7 @@ import { PlayerGender } from "#enums/player-gender";
 import { getPokeballAtlasKey, getPokeballTintColor } from "#app/data/pokeball";
 import { addPokeballOpenParticles } from "#app/field/anims";
 import { SpeciesFormChangeActiveTrigger } from "#app/data/pokemon-forms/form-change-triggers";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import { Nature } from "#enums/nature";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
 import { isPokemonValidForEncounterOptionSelection } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";

src/data/mystery-encounters/encounters/global-trade-system-encounter.ts

@@ -4,14 +4,11 @@ import {
   setEncounterRewards,
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import { TrainerSlot } from "#enums/trainer-slot";
-import { ModifierTier } from "#app/modifier/modifier-tier";
+import { ModifierTier } from "#enums/modifier-tier";
 import { MusicPreference } from "#app/system/settings/settings";
 import type { ModifierTypeOption } from "#app/modifier/modifier-type";
-import {
-  getPlayerModifierTypeOptions,
-  ModifierPoolType,
-  regenerateModifierPoolThresholds,
-} from "#app/modifier/modifier-type";
+import { getPlayerModifierTypeOptions, regenerateModifierPoolThresholds } from "#app/modifier/modifier-type";
+import { ModifierPoolType } from "#enums/modifier-pool-type";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { globalScene } from "#app/global-scene";
 import type MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";
@@ -19,7 +16,8 @@ import { MysteryEncounterBuilder } from "#app/data/mystery-encounters/mystery-en
 import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 import { SpeciesId } from "#enums/species-id";
 import type PokemonSpecies from "#app/data/pokemon-species";
-import { allSpecies, getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
+import { allSpecies } from "#app/data/data-lists";
 import { getTypeRgb } from "#app/data/type";
 import { MysteryEncounterOptionBuilder } from "#app/data/mystery-encounters/mystery-encounter-option";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";

src/data/mystery-encounters/encounters/lost-at-sea-encounter.ts

@@ -1,4 +1,4 @@
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { MoveId } from "#enums/move-id";
 import { SpeciesId } from "#enums/species-id";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";

src/data/mystery-encounters/encounters/mysterious-challengers-encounter.ts

@@ -7,8 +7,8 @@ import { trainerConfigs } from "#app/data/trainers/trainer-config";
 import { trainerPartyTemplates } from "#app/data/trainers/TrainerPartyTemplate";
 import { TrainerPartyCompoundTemplate } from "#app/data/trainers/TrainerPartyTemplate";
 import { TrainerPartyTemplate } from "#app/data/trainers/TrainerPartyTemplate";
-import { ModifierTier } from "#app/modifier/modifier-tier";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { ModifierTier } from "#enums/modifier-tier";
+import { modifierTypes } from "#app/data/data-lists";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { PartyMemberStrength } from "#enums/party-member-strength";
 import { globalScene } from "#app/global-scene";

src/data/mystery-encounters/encounters/mysterious-chest-encounter.ts

@@ -14,9 +14,9 @@ import {
   getHighestLevelPlayerPokemon,
   koPlayerPokemon,
 } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
-import { ModifierTier } from "#app/modifier/modifier-tier";
+import { ModifierTier } from "#enums/modifier-tier";
 import { randSeedInt } from "#app/utils/common";
 import { MoveId } from "#enums/move-id";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";

src/data/mystery-encounters/encounters/safari-zone-encounter.ts

@@ -17,7 +17,7 @@ import { PokeballType } from "#enums/pokeball";
 import { PlayerGender } from "#enums/player-gender";
 import { NumberHolder, randSeedInt } from "#app/utils/common";
 import type PokemonSpecies from "#app/data/pokemon-species";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { MoneyRequirement } from "#app/data/mystery-encounters/mystery-encounter-requirements";
 import {
   doPlayerFlee,

src/data/mystery-encounters/encounters/shady-vitamin-dealer-encounter.ts

@@ -7,7 +7,7 @@ import {
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import type { PlayerPokemon } from "#app/field/pokemon";
 import type Pokemon from "#app/field/pokemon";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import { randSeedInt } from "#app/utils/common";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { SpeciesId } from "#enums/species-id";

src/data/mystery-encounters/encounters/slumbering-snorlax-encounter.ts

@@ -1,6 +1,6 @@
 import { STEALING_MOVES } from "#app/data/mystery-encounters/requirements/requirement-groups";
 import type { PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { SpeciesId } from "#enums/species-id";
 import { globalScene } from "#app/global-scene";
@@ -24,13 +24,14 @@ import { MoveId } from "#enums/move-id";
 import { BattlerIndex } from "#enums/battler-index";
 import { PokemonMove } from "#app/data/moves/pokemon-move";
 import { AiType } from "#enums/ai-type";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";
 import { BerryType } from "#enums/berry-type";
 import { Stat } from "#enums/stat";
 import { CustomPokemonData } from "#app/data/custom-pokemon-data";
 import { randSeedInt } from "#app/utils/common";
+import { MoveUseMode } from "#enums/move-use-mode";
 
 /** i18n namespace for the encounter */
 const namespace = "mysteryEncounters/slumberingSnorlax";
@@ -137,7 +138,7 @@ export const SlumberingSnorlaxEncounter: MysteryEncounter = MysteryEncounterBuil
         sourceBattlerIndex: BattlerIndex.ENEMY,
         targets: [BattlerIndex.PLAYER],
         move: new PokemonMove(MoveId.SNORE),
-        ignorePp: true,
+        useMode: MoveUseMode.IGNORE_PP,
       });
       await initBattleWithEnemyConfig(encounter.enemyPartyConfigs[0]);
     },

src/data/mystery-encounters/encounters/teleporting-hijinks-encounter.ts

@@ -23,7 +23,8 @@ import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode
 import { BiomeId } from "#enums/biome-id";
 import { getBiomeKey } from "#app/field/arena";
 import { PokemonType } from "#enums/pokemon-type";
-import { getPartyLuckValue, modifierTypes } from "#app/modifier/modifier-type";
+import { getPartyLuckValue } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import { TrainerSlot } from "#enums/trainer-slot";
 import { BattlerTagType } from "#enums/battler-tag-type";
 import { getPokemonNameWithAffix } from "#app/messages";

src/data/mystery-encounters/encounters/the-expert-pokemon-breeder-encounter.ts

@@ -15,7 +15,7 @@ import { BiomeId } from "#enums/biome-id";
 import { TrainerType } from "#enums/trainer-type";
 import i18next from "i18next";
 import { SpeciesId } from "#enums/species-id";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { speciesStarterCosts } from "#app/data/balance/starters";
 import { Nature } from "#enums/nature";
 import { MoveId } from "#enums/move-id";
@@ -26,7 +26,7 @@ import { EggSourceType } from "#enums/egg-source-types";
 import { EggTier } from "#enums/egg-type";
 import { MysteryEncounterOptionBuilder } from "#app/data/mystery-encounters/mystery-encounter-option";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import { PokemonType } from "#enums/pokemon-type";
 import { getPokeballTintColor } from "#app/data/pokeball";
 

src/data/mystery-encounters/encounters/the-pokemon-salesman-encounter.ts

@@ -15,7 +15,7 @@ import {
   getSpriteKeysFromPokemon,
 } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
 import type PokemonSpecies from "#app/data/pokemon-species";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { speciesStarterCosts } from "#app/data/balance/starters";
 import { SpeciesId } from "#enums/species-id";
 import { PokeballType } from "#enums/pokeball";

src/data/mystery-encounters/encounters/the-strong-stuff-encounter.ts

@@ -8,12 +8,12 @@ import {
   generateModifierType,
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import type { PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { globalScene } from "#app/global-scene";
 import type MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";
 import { MysteryEncounterBuilder } from "#app/data/mystery-encounters/mystery-encounter";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { SpeciesId } from "#enums/species-id";
 import { Nature } from "#enums/nature";
 import type Pokemon from "#app/field/pokemon";
@@ -28,6 +28,7 @@ import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 import { CustomPokemonData } from "#app/data/custom-pokemon-data";
 import { Stat } from "#enums/stat";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
+import { MoveUseMode } from "#enums/move-use-mode";
 
 /** the i18n namespace for the encounter */
 const namespace = "mysteryEncounters/theStrongStuff";
@@ -214,13 +215,13 @@ export const TheStrongStuffEncounter: MysteryEncounter = MysteryEncounterBuilder
           sourceBattlerIndex: BattlerIndex.ENEMY,
           targets: [BattlerIndex.PLAYER],
           move: new PokemonMove(MoveId.GASTRO_ACID),
-          ignorePp: true,
+          useMode: MoveUseMode.IGNORE_PP,
         },
         {
           sourceBattlerIndex: BattlerIndex.ENEMY,
           targets: [BattlerIndex.PLAYER],
           move: new PokemonMove(MoveId.STEALTH_ROCK),
-          ignorePp: true,
+          useMode: MoveUseMode.IGNORE_PP,
         },
       );
 

src/data/mystery-encounters/encounters/the-winstrate-challenge-encounter.ts

@@ -8,7 +8,7 @@ import {
   transitionMysteryEncounterIntroVisuals,
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import type { PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { globalScene } from "#app/global-scene";
 import type MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";
@@ -17,18 +17,18 @@ import { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 import { TrainerType } from "#enums/trainer-type";
 import { SpeciesId } from "#enums/species-id";
 import { AbilityId } from "#enums/ability-id";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { MoveId } from "#enums/move-id";
 import { Nature } from "#enums/nature";
 import { PokemonType } from "#enums/pokemon-type";
 import { BerryType } from "#enums/berry-type";
 import { Stat } from "#enums/stat";
 import { SpeciesFormChangeAbilityTrigger } from "#app/data/pokemon-forms/form-change-triggers";
-import { applyPostBattleInitAbAttrs, PostBattleInitAbAttr } from "#app/data/abilities/ability";
+import { applyPostBattleInitAbAttrs } from "#app/data/abilities/apply-ab-attrs";
 import { showEncounterDialogue, showEncounterText } from "#app/data/mystery-encounters/utils/encounter-dialogue-utils";
 import { MysteryEncounterMode } from "#enums/mystery-encounter-mode";
 import i18next from "i18next";
-import { ModifierTier } from "#app/modifier/modifier-tier";
+import { ModifierTier } from "#enums/modifier-tier";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
 import { BattlerTagType } from "#enums/battler-tag-type";
 
@@ -221,7 +221,7 @@ function endTrainerBattleAndShowDialogue(): Promise<void> {
 
         // Each trainer battle is supposed to be a new fight, so reset all per-battle activation effects
         pokemon.resetBattleAndWaveData();
-        applyPostBattleInitAbAttrs(PostBattleInitAbAttr, pokemon);
+        applyPostBattleInitAbAttrs("PostBattleInitAbAttr", pokemon);
       }
 
       globalScene.phaseManager.unshiftNew("ShowTrainerPhase");

src/data/mystery-encounters/encounters/training-session-encounter.ts

@@ -1,4 +1,4 @@
-import type { Ability } from "#app/data/abilities/ability-class";
+import type { Ability } from "#app/data/abilities/ability";
 import { allAbilities } from "#app/data/data-lists";
 import type { EnemyPartyConfig } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import {

src/data/mystery-encounters/encounters/trash-to-treasure-encounter.ts

@@ -8,7 +8,7 @@ import {
   transitionMysteryEncounterIntroVisuals,
 } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import type { PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { globalScene } from "#app/global-scene";
 import type MysteryEncounter from "#app/data/mystery-encounters/mystery-encounter";
@@ -21,13 +21,14 @@ import { HitHealModifier, PokemonHeldItemModifier, TurnHealModifier } from "#app
 import { applyModifierTypeToPlayerPokemon } from "#app/data/mystery-encounters/utils/encounter-pokemon-utils";
 import { showEncounterText } from "#app/data/mystery-encounters/utils/encounter-dialogue-utils";
 import i18next from "#app/plugins/i18n";
-import { ModifierTier } from "#app/modifier/modifier-tier";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { ModifierTier } from "#enums/modifier-tier";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { MoveId } from "#enums/move-id";
 import { BattlerIndex } from "#enums/battler-index";
 import { PokemonMove } from "#app/data/moves/pokemon-move";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
 import { randSeedInt } from "#app/utils/common";
+import { MoveUseMode } from "#enums/move-use-mode";
 
 /** the i18n namespace for this encounter */
 const namespace = "mysteryEncounters/trashToTreasure";
@@ -207,13 +208,13 @@ export const TrashToTreasureEncounter: MysteryEncounter = MysteryEncounterBuilde
             sourceBattlerIndex: BattlerIndex.ENEMY,
             targets: [BattlerIndex.PLAYER],
             move: new PokemonMove(MoveId.TOXIC),
-            ignorePp: true,
+            useMode: MoveUseMode.IGNORE_PP,
           },
           {
             sourceBattlerIndex: BattlerIndex.ENEMY,
             targets: [BattlerIndex.ENEMY],
             move: new PokemonMove(MoveId.STOCKPILE),
-            ignorePp: true,
+            useMode: MoveUseMode.IGNORE_PP,
           },
         );
         await initBattleWithEnemyConfig(encounter.enemyPartyConfigs[0]);

src/data/mystery-encounters/encounters/uncommon-breed-encounter.ts

@@ -36,6 +36,7 @@ import { queueEncounterMessage } from "#app/data/mystery-encounters/utils/encoun
 import { BerryModifier } from "#app/modifier/modifier";
 import { Stat } from "#enums/stat";
 import { CLASSIC_MODE_MYSTERY_ENCOUNTER_WAVES } from "#app/constants";
+import { MoveUseMode } from "#enums/move-use-mode";
 
 /** the i18n namespace for the encounter */
 const namespace = "mysteryEncounters/uncommonBreed";
@@ -180,7 +181,7 @@ export const UncommonBreedEncounter: MysteryEncounter = MysteryEncounterBuilder.
           sourceBattlerIndex: BattlerIndex.ENEMY,
           targets: [target],
           move: pokemonMove,
-          ignorePp: true,
+          useMode: MoveUseMode.IGNORE_PP,
         });
       }
 

src/data/mystery-encounters/encounters/weird-dream-encounter.ts

@@ -19,13 +19,14 @@ import type Pokemon from "#app/field/pokemon";
 import { PokemonMove } from "#app/data/moves/pokemon-move";
 import { NumberHolder, isNullOrUndefined, randSeedInt, randSeedShuffle } from "#app/utils/common";
 import type PokemonSpecies from "#app/data/pokemon-species";
-import { allSpecies, getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
+import { allSpecies } from "#app/data/data-lists";
 import type { PokemonHeldItemModifier } from "#app/modifier/modifier";
 import { HiddenAbilityRateBoosterModifier, PokemonFormChangeItemModifier } from "#app/modifier/modifier";
 import { achvs } from "#app/system/achv";
 import { showEncounterText } from "#app/data/mystery-encounters/utils/encounter-dialogue-utils";
 import type { PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import i18next from "#app/plugins/i18n";
 import {
   doPokemonTransformationSequence,
@@ -34,7 +35,7 @@ import {
 import { getLevelTotalExp } from "#app/data/exp";
 import { Stat } from "#enums/stat";
 import { Challenges } from "#enums/challenges";
-import { ModifierTier } from "#app/modifier/modifier-tier";
+import { ModifierTier } from "#enums/modifier-tier";
 import { PlayerGender } from "#enums/player-gender";
 import { TrainerType } from "#enums/trainer-type";
 import PokemonData from "#app/system/pokemon-data";

src/data/mystery-encounters/mystery-encounter-requirements.ts

@@ -1,6 +1,5 @@
 import { globalScene } from "#app/global-scene";
 import { allAbilities } from "../data-lists";
-import { EvolutionItem, pokemonEvolutions } from "#app/data/balance/pokemon-evolutions";
 import { Nature } from "#enums/nature";
 import { pokemonFormChanges } from "#app/data/pokemon-forms";
 import { SpeciesFormChangeItemTrigger } from "../pokemon-forms/form-change-triggers";
@@ -11,12 +10,11 @@ import { WeatherType } from "#enums/weather-type";
 import type { PlayerPokemon } from "#app/field/pokemon";
 import { AttackTypeBoosterModifier } from "#app/modifier/modifier";
 import type { AttackTypeBoosterModifierType } from "#app/modifier/modifier-type";
-import { isNullOrUndefined } from "#app/utils/common";
+import { coerceArray, isNullOrUndefined } from "#app/utils/common";
 import type { AbilityId } from "#enums/ability-id";
 import { MoveId } from "#enums/move-id";
 import type { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import { SpeciesId } from "#enums/species-id";
-import { SpeciesFormKey } from "#enums/species-form-key";
 import { TimeOfDay } from "#enums/time-of-day";
 
 export interface EncounterRequirement {
@@ -272,7 +270,7 @@ export class TimeOfDayRequirement extends EncounterSceneRequirement {
 
   constructor(timeOfDay: TimeOfDay | TimeOfDay[]) {
     super();
-    this.requiredTimeOfDay = Array.isArray(timeOfDay) ? timeOfDay : [timeOfDay];
+    this.requiredTimeOfDay = coerceArray(timeOfDay);
   }
 
   override meetsRequirement(): boolean {
@@ -294,7 +292,7 @@ export class WeatherRequirement extends EncounterSceneRequirement {
 
   constructor(weather: WeatherType | WeatherType[]) {
     super();
-    this.requiredWeather = Array.isArray(weather) ? weather : [weather];
+    this.requiredWeather = coerceArray(weather);
   }
 
   override meetsRequirement(): boolean {
@@ -360,7 +358,7 @@ export class PersistentModifierRequirement extends EncounterSceneRequirement {
   constructor(heldItem: string | string[], minNumberOfItems = 1) {
     super();
     this.minNumberOfItems = minNumberOfItems;
-    this.requiredHeldItemModifiers = Array.isArray(heldItem) ? heldItem : [heldItem];
+    this.requiredHeldItemModifiers = coerceArray(heldItem);
   }
 
   override meetsRequirement(): boolean {
@@ -426,7 +424,7 @@ export class SpeciesRequirement extends EncounterPokemonRequirement {
     super();
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
-    this.requiredSpecies = Array.isArray(species) ? species : [species];
+    this.requiredSpecies = coerceArray(species);
   }
 
   override meetsRequirement(): boolean {
@@ -466,7 +464,7 @@ export class NatureRequirement extends EncounterPokemonRequirement {
     super();
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
-    this.requiredNature = Array.isArray(nature) ? nature : [nature];
+    this.requiredNature = coerceArray(nature);
   }
 
   override meetsRequirement(): boolean {
@@ -504,7 +502,7 @@ export class TypeRequirement extends EncounterPokemonRequirement {
     this.excludeFainted = excludeFainted;
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
-    this.requiredType = Array.isArray(type) ? type : [type];
+    this.requiredType = coerceArray(type);
   }
 
   override meetsRequirement(): boolean {
@@ -558,7 +556,7 @@ export class MoveRequirement extends EncounterPokemonRequirement {
     this.excludeDisallowedPokemon = excludeDisallowedPokemon;
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
-    this.requiredMoves = Array.isArray(moves) ? moves : [moves];
+    this.requiredMoves = coerceArray(moves);
   }
 
   override meetsRequirement(): boolean {
@@ -609,7 +607,7 @@ export class CompatibleMoveRequirement extends EncounterPokemonRequirement {
     super();
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
-    this.requiredMoves = Array.isArray(learnableMove) ? learnableMove : [learnableMove];
+    this.requiredMoves = coerceArray(learnableMove);
   }
 
   override meetsRequirement(): boolean {
@@ -665,7 +663,7 @@ export class AbilityRequirement extends EncounterPokemonRequirement {
     this.excludeDisallowedPokemon = excludeDisallowedPokemon;
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
-    this.requiredAbilities = Array.isArray(abilities) ? abilities : [abilities];
+    this.requiredAbilities = coerceArray(abilities);
   }
 
   override meetsRequirement(): boolean {
@@ -710,7 +708,7 @@ export class StatusEffectRequirement extends EncounterPokemonRequirement {
     super();
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
-    this.requiredStatusEffect = Array.isArray(statusEffect) ? statusEffect : [statusEffect];
+    this.requiredStatusEffect = coerceArray(statusEffect);
   }
 
   override meetsRequirement(): boolean {
@@ -785,7 +783,7 @@ export class CanFormChangeWithItemRequirement extends EncounterPokemonRequiremen
     super();
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
-    this.requiredFormChangeItem = Array.isArray(formChangeItem) ? formChangeItem : [formChangeItem];
+    this.requiredFormChangeItem = coerceArray(formChangeItem);
   }
 
   override meetsRequirement(): boolean {
@@ -834,70 +832,6 @@ export class CanFormChangeWithItemRequirement extends EncounterPokemonRequiremen
   }
 }
 
-export class CanEvolveWithItemRequirement extends EncounterPokemonRequirement {
-  requiredEvolutionItem: EvolutionItem[];
-  minNumberOfPokemon: number;
-  invertQuery: boolean;
-
-  constructor(evolutionItems: EvolutionItem | EvolutionItem[], minNumberOfPokemon = 1, invertQuery = false) {
-    super();
-    this.minNumberOfPokemon = minNumberOfPokemon;
-    this.invertQuery = invertQuery;
-    this.requiredEvolutionItem = Array.isArray(evolutionItems) ? evolutionItems : [evolutionItems];
-  }
-
-  override meetsRequirement(): boolean {
-    const partyPokemon = globalScene.getPlayerParty();
-    if (isNullOrUndefined(partyPokemon) || this.requiredEvolutionItem?.length < 0) {
-      return false;
-    }
-    return this.queryParty(partyPokemon).length >= this.minNumberOfPokemon;
-  }
-
-  filterByEvo(pokemon, evolutionItem) {
-    if (
-      pokemonEvolutions.hasOwnProperty(pokemon.species.speciesId) &&
-      pokemonEvolutions[pokemon.species.speciesId].filter(
-        e => e.item === evolutionItem && (!e.condition || e.condition.predicate(pokemon)),
-      ).length &&
-      pokemon.getFormKey() !== SpeciesFormKey.GIGANTAMAX
-    ) {
-      return true;
-    }
-
-    return (
-      pokemon.isFusion() &&
-      pokemonEvolutions.hasOwnProperty(pokemon.fusionSpecies.speciesId) &&
-      pokemonEvolutions[pokemon.fusionSpecies.speciesId].filter(
-        e => e.item === evolutionItem && (!e.condition || e.condition.predicate(pokemon)),
-      ).length &&
-      pokemon.getFusionFormKey() !== SpeciesFormKey.GIGANTAMAX
-    );
-  }
-
-  override queryParty(partyPokemon: PlayerPokemon[]): PlayerPokemon[] {
-    if (!this.invertQuery) {
-      return partyPokemon.filter(
-        pokemon =>
-          this.requiredEvolutionItem.filter(evolutionItem => this.filterByEvo(pokemon, evolutionItem)).length > 0,
-      );
-    }
-    // for an inverted query, we only want to get the pokemon that don't have ANY of the listed evolutionItemss
-    return partyPokemon.filter(
-      pokemon =>
-        this.requiredEvolutionItem.filter(evolutionItems => this.filterByEvo(pokemon, evolutionItems)).length === 0,
-    );
-  }
-
-  override getDialogueToken(pokemon?: PlayerPokemon): [string, string] {
-    const requiredItems = this.requiredEvolutionItem.filter(evoItem => this.filterByEvo(pokemon, evoItem));
-    if (requiredItems.length > 0) {
-      return ["evolutionItem", EvolutionItem[requiredItems[0]]];
-    }
-    return ["evolutionItem", ""];
-  }
-}
-
 export class HeldItemRequirement extends EncounterPokemonRequirement {
   requiredHeldItemModifiers: string[];
   minNumberOfPokemon: number;
@@ -908,7 +842,7 @@ export class HeldItemRequirement extends EncounterPokemonRequirement {
     super();
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
-    this.requiredHeldItemModifiers = Array.isArray(heldItem) ? heldItem : [heldItem];
+    this.requiredHeldItemModifiers = coerceArray(heldItem);
     this.requireTransferable = requireTransferable;
   }
 
@@ -972,7 +906,7 @@ export class AttackTypeBoosterHeldItemTypeRequirement extends EncounterPokemonRe
     super();
     this.minNumberOfPokemon = minNumberOfPokemon;
     this.invertQuery = invertQuery;
-    this.requiredHeldItemTypes = Array.isArray(heldItemTypes) ? heldItemTypes : [heldItemTypes];
+    this.requiredHeldItemTypes = coerceArray(heldItemTypes);
     this.requireTransferable = requireTransferable;
   }
 

src/data/mystery-encounters/mystery-encounter-save-data.ts

@@ -1,5 +1,5 @@
 import type { MysteryEncounterType } from "#enums/mystery-encounter-type";
-import { BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT } from "#app/data/mystery-encounters/mystery-encounters";
+import { BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT } from "#app/constants";
 import { isNullOrUndefined } from "#app/utils/common";
 import type { MysteryEncounterTier } from "#enums/mystery-encounter-tier";
 

src/data/mystery-encounters/mystery-encounter.ts

@@ -2,7 +2,7 @@ import type { EnemyPartyConfig } from "#app/data/mystery-encounters/utils/encoun
 import type { PlayerPokemon } from "#app/field/pokemon";
 import type { PokemonMove } from "../moves/pokemon-move";
 import type Pokemon from "#app/field/pokemon";
-import { capitalizeFirstLetter, isNullOrUndefined } from "#app/utils/common";
+import { capitalizeFirstLetter, coerceArray, isNullOrUndefined } from "#app/utils/common";
 import type { MysteryEncounterType } from "#enums/mystery-encounter-type";
 import type { MysteryEncounterSpriteConfig } from "#app/field/mystery-encounter-intro";
 import MysteryEncounterIntroVisuals from "#app/field/mystery-encounter-intro";
@@ -29,14 +29,14 @@ import type { GameModes } from "#enums/game-modes";
 import type { EncounterAnim } from "#enums/encounter-anims";
 import type { Challenges } from "#enums/challenges";
 import { globalScene } from "#app/global-scene";
+import type { MoveUseMode } from "#enums/move-use-mode";
 
 export interface EncounterStartOfBattleEffect {
   sourcePokemon?: Pokemon;
   sourceBattlerIndex?: BattlerIndex;
   targets: BattlerIndex[];
   move: PokemonMove;
-  ignorePp: boolean;
-  followUp?: boolean;
+  useMode: MoveUseMode; // TODO: This should always be ignore PP...
 }
 
 const DEFAULT_MAX_ALLOWED_ENCOUNTERS = 2;
@@ -254,7 +254,7 @@ export default class MysteryEncounter implements IMysteryEncounter {
    */
   selectedOption?: MysteryEncounterOption;
   /**
-   * Will be set by option select handlers automatically, and can be used to refer to which option was chosen by later phases
+   * Array containing data pertaining to free moves used at the start of a battle mystery envounter.
    */
   startOfBattleEffects: EncounterStartOfBattleEffect[] = [];
   /**
@@ -717,7 +717,7 @@ export class MysteryEncounterBuilder implements Partial<IMysteryEncounter> {
   withAnimations(
     ...encounterAnimations: EncounterAnim[]
   ): this & Required<Pick<IMysteryEncounter, "encounterAnimations">> {
-    const animations = Array.isArray(encounterAnimations) ? encounterAnimations : [encounterAnimations];
+    const animations = coerceArray(encounterAnimations);
     return Object.assign(this, { encounterAnimations: animations });
   }
 
@@ -729,7 +729,7 @@ export class MysteryEncounterBuilder implements Partial<IMysteryEncounter> {
   withDisallowedGameModes(
     ...disallowedGameModes: GameModes[]
   ): this & Required<Pick<IMysteryEncounter, "disallowedGameModes">> {
-    const gameModes = Array.isArray(disallowedGameModes) ? disallowedGameModes : [disallowedGameModes];
+    const gameModes = coerceArray(disallowedGameModes);
     return Object.assign(this, { disallowedGameModes: gameModes });
   }
 
@@ -741,7 +741,7 @@ export class MysteryEncounterBuilder implements Partial<IMysteryEncounter> {
   withDisallowedChallenges(
     ...disallowedChallenges: Challenges[]
   ): this & Required<Pick<IMysteryEncounter, "disallowedChallenges">> {
-    const challenges = Array.isArray(disallowedChallenges) ? disallowedChallenges : [disallowedChallenges];
+    const challenges = coerceArray(disallowedChallenges);
     return Object.assign(this, { disallowedChallenges: challenges });
   }
 

src/data/mystery-encounters/mystery-encounters.ts

@@ -34,42 +34,6 @@ import { GlobalTradeSystemEncounter } from "#app/data/mystery-encounters/encount
 import { TheExpertPokemonBreederEncounter } from "#app/data/mystery-encounters/encounters/the-expert-pokemon-breeder-encounter";
 import { getBiomeName } from "#app/data/balance/biomes";
 
-/**
- * Spawn chance: (BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT + WIGHT_INCREMENT_ON_SPAWN_MISS * <number of missed spawns>) / MYSTERY_ENCOUNTER_SPAWN_MAX_WEIGHT
- */
-export const BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT = 3;
-/**
- * The divisor for determining ME spawns, defines the "maximum" weight required for a spawn
- * If spawn_weight === MYSTERY_ENCOUNTER_SPAWN_MAX_WEIGHT, 100% chance to spawn a ME
- */
-export const MYSTERY_ENCOUNTER_SPAWN_MAX_WEIGHT = 256;
-/**
- * When an ME spawn roll fails, WEIGHT_INCREMENT_ON_SPAWN_MISS is added to future rolls for ME spawn checks.
- * These values are cleared whenever the next ME spawns, and spawn weight returns to BASE_MYSTERY_ENCOUNTER_SPAWN_WEIGHT
- */
-export const WEIGHT_INCREMENT_ON_SPAWN_MISS = 3;
-/**
- * Specifies the target average for total ME spawns in a single Classic run.
- * Used by anti-variance mechanic to check whether a run is above or below the target on a given wave.
- */
-export const AVERAGE_ENCOUNTERS_PER_RUN_TARGET = 12;
-/**
- * Will increase/decrease the chance of spawning a ME based on the current run's total MEs encountered vs AVERAGE_ENCOUNTERS_PER_RUN_TARGET
- * Example:
- * AVERAGE_ENCOUNTERS_PER_RUN_TARGET = 17 (expects avg 1 ME every 10 floors)
- * ANTI_VARIANCE_WEIGHT_MODIFIER = 15
- *
- * On wave 20, if 1 ME has been encountered, the difference from expected average is 0 MEs.
- * So anti-variance adds 0/256 to the spawn weight check for ME spawn.
- *
- * On wave 20, if 0 MEs have been encountered, the difference from expected average is 1 ME.
- * So anti-variance adds 15/256 to the spawn weight check for ME spawn.
- *
- * On wave 20, if 2 MEs have been encountered, the difference from expected average is -1 ME.
- * So anti-variance adds -15/256 to the spawn weight check for ME spawn.
- */
-export const ANTI_VARIANCE_WEIGHT_MODIFIER = 15;
-
 export const EXTREME_ENCOUNTER_BIOMES = [
   BiomeId.SEA,
   BiomeId.SEABED,

src/data/mystery-encounters/requirements/can-learn-move-requirement.ts

@@ -1,7 +1,7 @@
 import type { MoveId } from "#enums/move-id";
 import type { PlayerPokemon } from "#app/field/pokemon";
 import { PokemonMove } from "#app/data/moves/pokemon-move";
-import { isNullOrUndefined } from "#app/utils/common";
+import { coerceArray, isNullOrUndefined } from "#app/utils/common";
 import { EncounterPokemonRequirement } from "#app/data/mystery-encounters/mystery-encounter-requirements";
 import { globalScene } from "#app/global-scene";
 
@@ -29,7 +29,7 @@ export class CanLearnMoveRequirement extends EncounterPokemonRequirement {
 
   constructor(requiredMoves: MoveId | MoveId[], options: CanLearnMoveRequirementOptions = {}) {
     super();
-    this.requiredMoves = Array.isArray(requiredMoves) ? requiredMoves : [requiredMoves];
+    this.requiredMoves = coerceArray(requiredMoves);
 
     this.excludeLevelMoves = options.excludeLevelMoves ?? false;
     this.excludeTmMoves = options.excludeTmMoves ?? false;

src/data/mystery-encounters/utils/encounter-phase-utils.ts

@@ -1,12 +1,8 @@
 import type Battle from "#app/battle";
-import { BattlerIndex } from "#enums/battler-index";
 import { BattleType } from "#enums/battle-type";
 import { biomeLinks, BiomePoolTier } from "#app/data/balance/biomes";
 import type MysteryEncounterOption from "#app/data/mystery-encounters/mystery-encounter-option";
-import {
-  AVERAGE_ENCOUNTERS_PER_RUN_TARGET,
-  WEIGHT_INCREMENT_ON_SPAWN_MISS,
-} from "#app/data/mystery-encounters/mystery-encounters";
+import { AVERAGE_ENCOUNTERS_PER_RUN_TARGET, WEIGHT_INCREMENT_ON_SPAWN_MISS } from "#app/constants";
 import { showEncounterText } from "#app/data/mystery-encounters/utils/encounter-dialogue-utils";
 import type { PlayerPokemon } from "#app/field/pokemon";
 import type { AiType } from "#enums/ai-type";
@@ -17,18 +13,18 @@ import { FieldPosition } from "#enums/field-position";
 import type { CustomModifierSettings, ModifierType } from "#app/modifier/modifier-type";
 import {
   getPartyLuckValue,
-  ModifierPoolType,
   ModifierTypeGenerator,
   ModifierTypeOption,
-  modifierTypes,
   regenerateModifierPoolThresholds,
 } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
+import { ModifierPoolType } from "#enums/modifier-pool-type";
 import type PokemonData from "#app/system/pokemon-data";
 import type { OptionSelectConfig, OptionSelectItem } from "#app/ui/abstact-option-select-ui-handler";
 import type { PartyOption, PokemonSelectFilter } from "#app/ui/party-ui-handler";
 import { PartyUiMode } from "#app/ui/party-ui-handler";
 import { UiMode } from "#enums/ui-mode";
-import { isNullOrUndefined, randSeedInt, randomString, randSeedItem } from "#app/utils/common";
+import { isNullOrUndefined, randSeedInt, randomString, randSeedItem, coerceArray } from "#app/utils/common";
 import type { BattlerTagType } from "#enums/battler-tag-type";
 import { BiomeId } from "#enums/biome-id";
 import type { TrainerType } from "#enums/trainer-type";
@@ -52,7 +48,7 @@ import type HeldModifierConfig from "#app/@types/held-modifier-config";
 import type { Variant } from "#app/sprites/variant";
 import { StatusEffect } from "#enums/status-effect";
 import { globalScene } from "#app/global-scene";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { PokemonType } from "#enums/pokemon-type";
 import { getNatureName } from "#app/data/nature";
 import { getPokemonNameWithAffix } from "#app/messages";
@@ -452,7 +448,7 @@ export async function initBattleWithEnemyConfig(partyConfig: EnemyPartyConfig):
  * @param moves
  */
 export function loadCustomMovesForEncounter(moves: MoveId | MoveId[]) {
-  moves = Array.isArray(moves) ? moves : [moves];
+  moves = coerceArray(moves);
   return Promise.all(moves.map(move => initMoveAnim(move))).then(() => loadMoveAnimAssets(moves));
 }
 
@@ -795,7 +791,7 @@ export function setEncounterRewards(
  * @param useWaveIndex - set to false when directly passing the the full exp value instead of baseExpValue
  */
 export function setEncounterExp(participantId: number | number[], baseExpValue: number, useWaveIndex = true) {
-  const participantIds = Array.isArray(participantId) ? participantId : [participantId];
+  const participantIds = coerceArray(participantId);
 
   globalScene.currentBattle.mysteryEncounter!.doEncounterExp = () => {
     globalScene.phaseManager.unshiftNew("PartyExpPhase", baseExpValue, useWaveIndex, new Set(participantIds));
@@ -977,33 +973,8 @@ export function handleMysteryEncounterBattleStartEffects() {
   ) {
     const effects = encounter.startOfBattleEffects;
     effects.forEach(effect => {
-      let source: EnemyPokemon | Pokemon;
-      if (effect.sourcePokemon) {
-        source = effect.sourcePokemon;
-      } else if (!isNullOrUndefined(effect.sourceBattlerIndex)) {
-        if (effect.sourceBattlerIndex === BattlerIndex.ATTACKER) {
-          source = globalScene.getEnemyField()[0];
-        } else if (effect.sourceBattlerIndex === BattlerIndex.ENEMY) {
-          source = globalScene.getEnemyField()[0];
-        } else if (effect.sourceBattlerIndex === BattlerIndex.ENEMY_2) {
-          source = globalScene.getEnemyField()[1];
-        } else if (effect.sourceBattlerIndex === BattlerIndex.PLAYER) {
-          source = globalScene.getPlayerField()[0];
-        } else if (effect.sourceBattlerIndex === BattlerIndex.PLAYER_2) {
-          source = globalScene.getPlayerField()[1];
-        }
-      } else {
-        source = globalScene.getEnemyField()[0];
-      }
-      globalScene.phaseManager.pushNew(
-        "MovePhase",
-        // @ts-expect-error: source is guaranteed to be defined
-        source,
-        effect.targets,
-        effect.move,
-        effect.followUp,
-        effect.ignorePp,
-      );
+      const source = effect.sourcePokemon ?? globalScene.getField()[effect.sourceBattlerIndex ?? 0];
+      globalScene.phaseManager.pushNew("MovePhase", source, effect.targets, effect.move, effect.useMode);
     });
 
     // Pseudo turn end phase to reset flinch states, Endure, etc.

src/data/mystery-encounters/utils/encounter-pokemon-utils.ts

@@ -20,7 +20,7 @@ import { PartyUiMode } from "#app/ui/party-ui-handler";
 import { SpeciesId } from "#enums/species-id";
 import type { PokemonType } from "#enums/pokemon-type";
 import type PokemonSpecies from "#app/data/pokemon-species";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { speciesStarterCosts } from "#app/data/balance/starters";
 import {
   getEncounterText,
@@ -29,7 +29,7 @@ import {
 } from "#app/data/mystery-encounters/utils/encounter-dialogue-utils";
 import { getPokemonNameWithAffix } from "#app/messages";
 import type { PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "#app/data/data-lists";
 import { Gender } from "#app/data/gender";
 import type { PermanentStat } from "#enums/stat";
 import { SummaryUiMode } from "#app/ui/summary-ui-handler";

src/data/phase-priority-queue.ts

@@ -0,0 +1,97 @@
+import { globalScene } from "#app/global-scene";
+import type { Phase } from "#app/phase";
+import { ActivatePriorityQueuePhase } from "#app/phases/activate-priority-queue-phase";
+import type { PostSummonPhase } from "#app/phases/post-summon-phase";
+import { PostSummonActivateAbilityPhase } from "#app/phases/post-summon-activate-ability-phase";
+import { Stat } from "#enums/stat";
+import { BooleanHolder } from "#app/utils/common";
+import { TrickRoomTag } from "#app/data/arena-tag";
+import { DynamicPhaseType } from "#enums/dynamic-phase-type";
+
+/**
+ * Stores a list of {@linkcode Phase}s
+ *
+ * Dynamically updates ordering to always pop the highest "priority", based on implementation of {@linkcode reorder}
+ */
+export abstract class PhasePriorityQueue {
+  protected abstract queue: Phase[];
+
+  /**
+   * Sorts the elements in the queue
+   */
+  public abstract reorder(): void;
+
+  /**
+   * Calls {@linkcode reorder} and shifts the queue
+   * @returns The front element of the queue after sorting
+   */
+  public pop(): Phase | undefined {
+    this.reorder();
+    return this.queue.shift();
+  }
+
+  /**
+   * Adds a phase to the queue
+   * @param phase The phase to add
+   */
+  public push(phase: Phase): void {
+    this.queue.push(phase);
+  }
+
+  /**
+   * Removes all phases from the queue
+   */
+  public clear(): void {
+    this.queue.splice(0, this.queue.length);
+  }
+}
+
+/**
+ * Priority Queue for {@linkcode PostSummonPhase} and {@linkcode PostSummonActivateAbilityPhase}
+ *
+ * Orders phases first by ability priority, then by the {@linkcode Pokemon}'s effective speed
+ */
+export class PostSummonPhasePriorityQueue extends PhasePriorityQueue {
+  protected override queue: PostSummonPhase[] = [];
+
+  public override reorder(): void {
+    this.queue.sort((phaseA: PostSummonPhase, phaseB: PostSummonPhase) => {
+      if (phaseA.getPriority() === phaseB.getPriority()) {
+        return (
+          (phaseB.getPokemon().getEffectiveStat(Stat.SPD) - phaseA.getPokemon().getEffectiveStat(Stat.SPD)) *
+          (isTrickRoom() ? -1 : 1)
+        );
+      }
+
+      return phaseB.getPriority() - phaseA.getPriority();
+    });
+  }
+
+  public override push(phase: PostSummonPhase): void {
+    super.push(phase);
+    this.queueAbilityPhase(phase);
+  }
+
+  /**
+   * Queues all necessary {@linkcode PostSummonActivateAbilityPhase}s for each pushed {@linkcode PostSummonPhase}
+   * @param phase The {@linkcode PostSummonPhase} that was pushed onto the queue
+   */
+  private queueAbilityPhase(phase: PostSummonPhase): void {
+    const phasePokemon = phase.getPokemon();
+
+    phasePokemon.getAbilityPriorities().forEach((priority, idx) => {
+      this.queue.push(new PostSummonActivateAbilityPhase(phasePokemon.getBattlerIndex(), priority, !!idx));
+      globalScene.phaseManager.appendToPhase(
+        new ActivatePriorityQueuePhase(DynamicPhaseType.POST_SUMMON),
+        "ActivatePriorityQueuePhase",
+        (p: ActivatePriorityQueuePhase) => p.getType() === DynamicPhaseType.POST_SUMMON,
+      );
+    });
+  }
+}
+
+function isTrickRoom(): boolean {
+  const speedReversed = new BooleanHolder(false);
+  globalScene.arena.applyTags(TrickRoomTag, false, speedReversed);
+  return speedReversed.value;
+}

src/data/pokeball.ts

@@ -1,5 +1,4 @@
 import { globalScene } from "#app/global-scene";
-import { CriticalCatchChanceBoosterModifier } from "#app/modifier/modifier";
 import { NumberHolder } from "#app/utils/common";
 import { PokeballType } from "#enums/pokeball";
 import i18next from "i18next";
@@ -94,7 +93,7 @@ export function getCriticalCaptureChance(modifiedCatchRate: number): number {
   }
   const dexCount = globalScene.gameData.getSpeciesCount(d => !!d.caughtAttr);
   const catchingCharmMultiplier = new NumberHolder(1);
-  globalScene.findModifier(m => m instanceof CriticalCatchChanceBoosterModifier)?.apply(catchingCharmMultiplier);
+  globalScene.findModifier(m => m.is("CriticalCatchChanceBoosterModifier"))?.apply(catchingCharmMultiplier);
   const dexMultiplier =
     globalScene.gameMode.isDaily || dexCount > 800
       ? 2.5

src/data/pokemon-forms/form-change-triggers.ts

@@ -1,5 +1,5 @@
 import i18next from "i18next";
-import type { Constructor } from "#app/utils/common";
+import { coerceArray, type Constructor } from "#app/utils/common";
 import type { TimeOfDay } from "#enums/time-of-day";
 import type Pokemon from "#app/field/pokemon";
 import type { SpeciesFormChange } from "#app/data/pokemon-forms";
@@ -125,10 +125,7 @@ export class SpeciesFormChangeStatusEffectTrigger extends SpeciesFormChangeTrigg
 
   constructor(statusEffects: StatusEffect | StatusEffect[], invert = false) {
     super();
-    if (!Array.isArray(statusEffects)) {
-      statusEffects = [statusEffects];
-    }
-    this.statusEffects = statusEffects;
+    this.statusEffects = coerceArray(statusEffects);
     this.invert = invert;
     // this.description = i18next.t("pokemonEvolutions:Forms.statusEffect");
   }

src/data/pokemon-species.ts

@@ -42,6 +42,8 @@ import { starterPassiveAbilities } from "#app/data/balance/passives";
 import { loadPokemonVariantAssets } from "#app/sprites/pokemon-sprite";
 import { hasExpSprite } from "#app/sprites/sprite-utils";
 import { Gender } from "./gender";
+import { allSpecies } from "#app/data/data-lists";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 
 export enum Region {
   NORMAL,
@@ -82,23 +84,6 @@ export const normalForm: SpeciesId[] = [
   SpeciesId.CALYREX,
 ];
 
-/**
- * Gets the {@linkcode PokemonSpecies} object associated with the {@linkcode SpeciesId} enum given
- * @param species The species to fetch
- * @returns The associated {@linkcode PokemonSpecies} object
- */
-export function getPokemonSpecies(species: SpeciesId | SpeciesId[]): PokemonSpecies {
-  // If a special pool (named trainers) is used here it CAN happen that they have a array as species (which means choose one of those two). So we catch that with this code block
-  if (Array.isArray(species)) {
-    // Pick a random species from the list
-    species = species[Math.floor(Math.random() * species.length)];
-  }
-  if (species >= 2000) {
-    return allSpecies.find(s => s.speciesId === species)!; // TODO: is this bang correct?
-  }
-  return allSpecies[species - 1];
-}
-
 export function getPokemonSpeciesForm(species: SpeciesId, formIndex: number): PokemonSpeciesForm {
   const retSpecies: PokemonSpecies =
     species >= 2000
@@ -1448,8 +1433,6 @@ export function getPokerusStarters(): PokemonSpecies[] {
   return pokerusStarters;
 }
 
-export const allSpecies: PokemonSpecies[] = [];
-
 // biome-ignore format: manually formatted
 export function initSpecies() {
   allSpecies.push(

src/data/trainers/trainer-config.ts

@@ -1,11 +1,18 @@
 import { globalScene } from "#app/global-scene";
-import { modifierTypes } from "#app/modifier/modifier-type";
+import { modifierTypes } from "../data-lists";
 import { PokemonMove } from "../moves/pokemon-move";
-import { toReadableString, isNullOrUndefined, randSeedItem, randSeedInt, randSeedIntRange } from "#app/utils/common";
+import {
+  toReadableString,
+  isNullOrUndefined,
+  randSeedItem,
+  randSeedInt,
+  coerceArray,
+  randSeedIntRange,
+} from "#app/utils/common";
 import { pokemonEvolutions, pokemonPrevolutions } from "#app/data/balance/pokemon-evolutions";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { tmSpecies } from "#app/data/balance/tms";
-import { doubleBattleDialogue } from "#app/data/dialogue";
+import { doubleBattleDialogue } from "../double-battle-dialogue";
 import { TrainerVariant } from "#enums/trainer-variant";
 import { getIsInitialized, initI18n } from "#app/plugins/i18n";
 import i18next from "i18next";
@@ -37,7 +44,7 @@ import { timedEventManager } from "#app/global-event-manager";
 // Type imports
 import type { PokemonSpeciesFilter } from "#app/data/pokemon-species";
 import type PokemonSpecies from "#app/data/pokemon-species";
-import type { ModifierTypeFunc } from "#app/modifier/modifier-type";
+import type { ModifierTypeFunc } from "#app/@types/modifier-types";
 import type { EnemyPokemon } from "#app/field/pokemon";
 import type { EvilTeam } from "./evil-admin-trainer-pools";
 import type {
@@ -554,10 +561,7 @@ export class TrainerConfig {
     this.speciesPools = evilAdminTrainerPools[poolName];
 
     signatureSpecies.forEach((speciesPool, s) => {
-      if (!Array.isArray(speciesPool)) {
-        speciesPool = [speciesPool];
-      }
-      this.setPartyMemberFunc(-(s + 1), getRandomPartyMemberFunc(speciesPool));
+      this.setPartyMemberFunc(-(s + 1), getRandomPartyMemberFunc(coerceArray(speciesPool)));
     });
 
     const nameForCall = this.name.toLowerCase().replace(/\s/g, "_");
@@ -620,10 +624,7 @@ export class TrainerConfig {
       this.setPartyTemplates(trainerPartyTemplates.RIVAL_5);
     }
     signatureSpecies.forEach((speciesPool, s) => {
-      if (!Array.isArray(speciesPool)) {
-        speciesPool = [speciesPool];
-      }
-      this.setPartyMemberFunc(-(s + 1), getRandomPartyMemberFunc(speciesPool));
+      this.setPartyMemberFunc(-(s + 1), getRandomPartyMemberFunc(coerceArray(speciesPool)));
     });
     if (!isNullOrUndefined(specialtyType)) {
       this.setSpeciesFilter(p => p.isOfType(specialtyType));
@@ -668,12 +669,8 @@ export class TrainerConfig {
 
     // Set up party members with their corresponding species.
     signatureSpecies.forEach((speciesPool, s) => {
-      // Ensure speciesPool is an array.
-      if (!Array.isArray(speciesPool)) {
-        speciesPool = [speciesPool];
-      }
       // Set a function to get a random party member from the species pool.
-      this.setPartyMemberFunc(-(s + 1), getRandomPartyMemberFunc(speciesPool));
+      this.setPartyMemberFunc(-(s + 1), getRandomPartyMemberFunc(coerceArray(speciesPool)));
     });
 
     // If specialty type is provided, set species filter and specialty type.
@@ -729,12 +726,8 @@ export class TrainerConfig {
 
     // Set up party members with their corresponding species.
     signatureSpecies.forEach((speciesPool, s) => {
-      // Ensure speciesPool is an array.
-      if (!Array.isArray(speciesPool)) {
-        speciesPool = [speciesPool];
-      }
       // Set a function to get a random party member from the species pool.
-      this.setPartyMemberFunc(-(s + 1), getRandomPartyMemberFunc(speciesPool));
+      this.setPartyMemberFunc(-(s + 1), getRandomPartyMemberFunc(coerceArray(speciesPool)));
     });
 
     // Set species filter and specialty type if provided, otherwise filter by base total.

src/data/weather.ts

@@ -5,12 +5,12 @@ import type Pokemon from "../field/pokemon";
 import { PokemonType } from "#enums/pokemon-type";
 import type Move from "./moves/move";
 import { randSeedInt } from "#app/utils/common";
-import { SuppressWeatherEffectAbAttr } from "./abilities/ability";
 import { TerrainType, getTerrainName } from "./terrain";
 import i18next from "i18next";
 import { globalScene } from "#app/global-scene";
 import type { Arena } from "#app/field/arena";
 import { timedEventManager } from "#app/global-event-manager";
+import type { SuppressWeatherEffectAbAttr } from "./abilities/ability";
 
 export class Weather {
   public weatherType: WeatherType;
@@ -108,10 +108,10 @@ export class Weather {
     for (const pokemon of field) {
       let suppressWeatherEffectAbAttr: SuppressWeatherEffectAbAttr | null = pokemon
         .getAbility()
-        .getAttrs(SuppressWeatherEffectAbAttr)[0];
+        .getAttrs("SuppressWeatherEffectAbAttr")[0];
       if (!suppressWeatherEffectAbAttr) {
         suppressWeatherEffectAbAttr = pokemon.hasPassive()
-          ? pokemon.getPassiveAbility().getAttrs(SuppressWeatherEffectAbAttr)[0]
+          ? pokemon.getPassiveAbility().getAttrs("SuppressWeatherEffectAbAttr")[0]
           : null;
       }
       if (suppressWeatherEffectAbAttr && (!this.isImmutable() || suppressWeatherEffectAbAttr.affectsImmutable)) {

src/enums/battler-tag-lapse-type.ts

@@ -1,12 +1,37 @@
+/**
+ * Enum representing the possible ways a given BattlerTag can activate and/or tick down.
+ * Each tag can have multiple different behaviors attached to different lapse types.
+ */
 export enum BattlerTagLapseType {
+  // TODO: This is unused...
   FAINT,
+  /**
+   * Tag activate before the holder uses a non-virtual move, possibly interrupting its action.
+   * @see MoveUseMode for more information
+   */
   MOVE,
+  /** Tag activates before the holder uses **any** move, triggering effects or interrupting its action. */
   PRE_MOVE,
+  /** Tag activates immediately after the holder's move finishes triggering (successful or not). */
   AFTER_MOVE,
+  /**
+   * Tag activates before move effects are applied.
+   * TODO: Stop using this as a catch-all "semi-invulnerability" tag
+   */
   MOVE_EFFECT,
+  /** Tag activates at the end of the turn. */
   TURN_END,
+  /**
+   * Tag activates after the holder is hit by an attack, but before damage is applied.
+   * Occurs even if the user's {@linkcode SubstituteTag | Substitute} is hit.
+   */
   HIT,
-  /** Tag lapses AFTER_HIT, applying its effects even if the user faints */
+  /**
+   * Tag activates after the holder is directly hit by an attack.
+   * Does **not** occur on hits to the holder's {@linkcode SubstituteTag | Substitute},
+   * but still triggers on being KO'd.
+   */
   AFTER_HIT,
-  CUSTOM
+  /** The tag has some other custom activation or removal condition. */
+  CUSTOM,
 }

src/enums/dynamic-phase-type.ts

@@ -0,0 +1,6 @@
+/**
+ * Enum representation of the phase types held by implementations of {@linkcode PhasePriorityQueue}
+ */
+export enum DynamicPhaseType {
+  POST_SUMMON
+}

src/enums/modifier-pool-type.ts

@@ -0,0 +1,7 @@
+export enum ModifierPoolType {
+  PLAYER,
+  WILD,
+  TRAINER,
+  ENEMY_BUFF,
+  DAILY_STARTER
+}

src/enums/move-use-mode.ts

@@ -0,0 +1,149 @@
+import type { PostDancingMoveAbAttr } from "#app/data/abilities/ability";
+import type { BattlerTagLapseType } from "#enums/battler-tag-lapse-type";
+
+/**
+ * Enum representing all the possible means through which a given move can be executed.
+ * Each one inherits the properties (or exclusions) of all types preceding it.
+ * Properties newly found on a given use mode will be **bolded**,
+ * while oddities breaking a previous trend will be listed in _italics_.
+
+ * Callers should refrain from performing non-equality checks on `MoveUseMode`s directly,
+ * instead using the available helper functions
+ * ({@linkcode isVirtual}, {@linkcode isIgnoreStatus}, {@linkcode isIgnorePP} and {@linkcode isReflected}).
+ */
+export const MoveUseMode = {
+  /**
+  * This move was used normally (i.e. clicking on the button) or called via Instruct.
+  * It deducts PP from the user's moveset (failing if out of PP), and interacts normally with other moves and abilities.
+  */
+  NORMAL: 1,
+
+  /**
+   * This move was called by an effect that ignores PP, such as a consecutively executed move (e.g. Outrage).
+   *
+   * PP-ignoring moves (as their name implies) **do not consume PP** when used
+   * and **will not fail** if none is left prior to execution.
+   * All other effects remain identical to {@linkcode MoveUseMode.NORMAL}.
+   *
+   * PP can still be reduced by other effects (such as Spite or Eerie Spell).
+   */
+  IGNORE_PP: 2,
+
+  /**
+   * This move was called indirectly by an out-of-turn effect other than Instruct or the user's previous move.
+   * Currently only used by {@linkcode PostDancingMoveAbAttr | Dancer}.
+   *
+   * Indirect moves ignore PP checks similar to {@linkcode MoveUseMode.IGNORE_PP}, but additionally **cannot be copied**
+   * by all move-copying effects (barring reflection).
+   * They are also **"skipped over" by most moveset and move history-related effects** (PP reduction, Last Resort, etc).
+   *
+   * They still respect the user's volatile status conditions and confusion (though will uniquely _cure freeze and sleep before use_).
+   */
+  INDIRECT: 3,
+
+  /**
+    * This move was called as part of another move's effect (such as for most {@link https://bulbapedia.bulbagarden.net/wiki/Category:Moves_that_call_other_moves | Move-calling moves}).
+
+    * Follow-up moves **bypass cancellation** from all **non-volatile status conditions** and **{@linkcode BattlerTagLapseType.MOVE}-type effects**
+    * (having been checked already on the calling move).
+
+    * They are _not ignored_ by other move-calling moves and abilities (unlike {@linkcode MoveUseMode.FOLLOW_UP} and {@linkcode MoveUseMode.REFLECTED}),
+    * but still inherit the former's disregard for moveset-related effects.
+    */
+  FOLLOW_UP: 4,
+
+  /**
+   * This move was reflected by Magic Coat or Magic Bounce.
+
+   * Reflected moves ignore all the same cancellation checks as {@linkcode MoveUseMode.INDIRECT}
+   * and retain the same copy prevention as {@linkcode MoveUseMode.FOLLOW_UP}, but additionally
+   * **cannot be reflected by other reflecting effects**.
+   */
+  REFLECTED: 5
+  // TODO: Add use type TRANSPARENT for Future Sight and Doom Desire to prevent move history pushing
+} as const;
+
+export type MoveUseMode = (typeof MoveUseMode)[keyof typeof MoveUseMode];
+
+// # HELPER FUNCTIONS
+// Please update the markdown tables if any new `MoveUseMode`s get added.
+
+/**
+ * Check if a given {@linkcode MoveUseMode} is virtual (i.e. called by another move or effect).
+ * Virtual moves are ignored by most moveset-related effects due to not being executed directly.
+ * @returns Whether {@linkcode useMode} is virtual.
+ * @remarks
+ * This function is equivalent to the following truth table:
+ *
+ * | Use Type                           | Returns |
+ * |------------------------------------|---------|
+ * | {@linkcode MoveUseMode.NORMAL}     | `false` |
+ * | {@linkcode MoveUseMode.IGNORE_PP}  | `false` |
+ * | {@linkcode MoveUseMode.INDIRECT}   | `true`  |
+ * | {@linkcode MoveUseMode.FOLLOW_UP}  | `true`  |
+ * | {@linkcode MoveUseMode.REFLECTED}  | `true`  |
+ */
+export function isVirtual(useMode: MoveUseMode): boolean {
+  return useMode >= MoveUseMode.INDIRECT
+}
+
+/**
+ * Check if a given {@linkcode MoveUseMode} should ignore pre-move cancellation checks
+ * from {@linkcode StatusEffect.PARALYSIS} and {@linkcode BattlerTagLapseType.MOVE}-type effects.
+ * @param useMode - The {@linkcode MoveUseMode} to check.
+ * @returns Whether {@linkcode useMode} should ignore status and otehr cancellation checks.
+ * @remarks
+ * This function is equivalent to the following truth table:
+ *
+ * | Use Type                           | Returns |
+ * |------------------------------------|---------|
+ * | {@linkcode MoveUseMode.NORMAL}     | `false` |
+ * | {@linkcode MoveUseMode.IGNORE_PP}  | `false` |
+ * | {@linkcode MoveUseMode.INDIRECT}   | `false` |
+ * | {@linkcode MoveUseMode.FOLLOW_UP}  | `true`  |
+ * | {@linkcode MoveUseMode.REFLECTED}  | `true`  |
+ */
+export function isIgnoreStatus(useMode: MoveUseMode): boolean {
+  return useMode >= MoveUseMode.FOLLOW_UP;
+}
+
+/**
+ * Check if a given {@linkcode MoveUseMode} should ignore PP.
+ * PP-ignoring moves will ignore normal PP consumption as well as associated failure checks.
+ * @param useMode - The {@linkcode MoveUseMode} to check.
+ * @returns Whether {@linkcode useMode} ignores PP.
+ * @remarks
+ * This function is equivalent to the following truth table:
+ *
+ * | Use Type                           | Returns |
+ * |------------------------------------|---------|
+ * | {@linkcode MoveUseMode.NORMAL}     | `false` |
+ * | {@linkcode MoveUseMode.IGNORE_PP}  | `true`  |
+ * | {@linkcode MoveUseMode.INDIRECT}   | `true`  |
+ * | {@linkcode MoveUseMode.FOLLOW_UP}  | `true`  |
+ * | {@linkcode MoveUseMode.REFLECTED}  | `true`  |
+ */
+export function isIgnorePP(useMode: MoveUseMode): boolean {
+  return useMode >= MoveUseMode.IGNORE_PP;
+}
+
+/**
+ * Check if a given {@linkcode MoveUseMode} is reflected.
+ * Reflected moves cannot be reflected, copied, or cancelled by status effects,
+ * nor will they trigger {@linkcode PostDancingMoveAbAttr | Dancer}.
+ * @param useMode - The {@linkcode MoveUseMode} to check.
+ * @returns Whether {@linkcode useMode} is reflected.
+ * @remarks
+ * This function is equivalent to the following truth table:
+ *
+ * | Use Type                           | Returns |
+ * |------------------------------------|---------|
+ * | {@linkcode MoveUseMode.NORMAL}     | `false` |
+ * | {@linkcode MoveUseMode.IGNORE_PP}  | `false` |
+ * | {@linkcode MoveUseMode.INDIRECT}   | `false` |
+ * | {@linkcode MoveUseMode.FOLLOW_UP}  | `false` |
+ * | {@linkcode MoveUseMode.REFLECTED}  | `true`  |
+ */
+export function isReflected(useMode: MoveUseMode): boolean {
+  return useMode === MoveUseMode.REFLECTED;
+}

src/enums/unlockables.ts

@@ -0,0 +1,7 @@
+
+export enum Unlockables {
+  ENDLESS_MODE,
+  MINI_BLACK_HOLE,
+  SPLICED_ENDLESS_MODE,
+  EVIOLITE
+}

src/field/arena.ts

@@ -3,7 +3,7 @@ import type { BiomeTierTrainerPools, PokemonPools } from "#app/data/balance/biom
 import { biomePokemonPools, BiomePoolTier, biomeTrainerPools } from "#app/data/balance/biomes";
 import { randSeedInt, NumberHolder, isNullOrUndefined, type Constructor } from "#app/utils/common";
 import type PokemonSpecies from "#app/data/pokemon-species";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import {
   getTerrainClearMessage,
   getTerrainStartMessage,
@@ -24,10 +24,7 @@ import {
   applyAbAttrs,
   applyPostTerrainChangeAbAttrs,
   applyPostWeatherChangeAbAttrs,
-  PostTerrainChangeAbAttr,
-  PostWeatherChangeAbAttr,
-  TerrainEventTypeChangeAbAttr,
-} from "#app/data/abilities/ability";
+} from "#app/data/abilities/apply-ab-attrs";
 import type Pokemon from "#app/field/pokemon";
 import Overrides from "#app/overrides";
 import { TagAddedEvent, TagRemovedEvent, TerrainChangedEvent, WeatherChangedEvent } from "#app/events/arena";
@@ -265,7 +262,7 @@ export class Arena {
             return 5;
         }
         break;
-      case SpeciesId.LYCANROC:
+      case SpeciesId.LYCANROC: {
         const timeOfDay = this.getTimeOfDay();
         switch (timeOfDay) {
           case TimeOfDay.DAY:
@@ -278,6 +275,7 @@ export class Arena {
         }
         break;
       }
+    }
 
     return 0;
   }
@@ -374,7 +372,7 @@ export class Arena {
         pokemon.findAndRemoveTags(
           t => "weatherTypes" in t && !(t.weatherTypes as WeatherType[]).find(t => t === weather),
         );
-        applyPostWeatherChangeAbAttrs(PostWeatherChangeAbAttr, pokemon, weather);
+        applyPostWeatherChangeAbAttrs("PostWeatherChangeAbAttr", pokemon, weather);
       });
 
     return true;
@@ -463,8 +461,8 @@ export class Arena {
         pokemon.findAndRemoveTags(
           t => "terrainTypes" in t && !(t.terrainTypes as TerrainType[]).find(t => t === terrain),
         );
-        applyPostTerrainChangeAbAttrs(PostTerrainChangeAbAttr, pokemon, terrain);
-        applyAbAttrs(TerrainEventTypeChangeAbAttr, pokemon, null, false);
+        applyPostTerrainChangeAbAttrs("PostTerrainChangeAbAttr", pokemon, terrain);
+        applyAbAttrs("TerrainEventTypeChangeAbAttr", pokemon, null, false);
       });
 
     return true;
@@ -767,6 +765,9 @@ export class Arena {
         );
   }
 
+  // TODO: Add an overload similar to `Array.prototype.find` if the predicate func is of the form
+  // `(x): x is T`
+
   /**
    * Uses {@linkcode findTagsOnSide} to filter (using the parameter function) for specific tags that apply to both sides
    * @param tagPredicate a function mapping {@linkcode ArenaTag}s to `boolean`s

src/field/pokemon-sprite-sparkle-handler.ts

@@ -1,6 +1,6 @@
 import { globalScene } from "#app/global-scene";
 import Pokemon from "./pokemon";
-import { fixedInt, randInt } from "#app/utils/common";
+import { fixedInt, coerceArray, randInt } from "#app/utils/common";
 
 export default class PokemonSpriteSparkleHandler {
   private sprites: Set<Phaser.GameObjects.Sprite>;
@@ -57,9 +57,7 @@ export default class PokemonSpriteSparkleHandler {
   }
 
   add(sprites: Phaser.GameObjects.Sprite | Phaser.GameObjects.Sprite[]): void {
-    if (!Array.isArray(sprites)) {
-      sprites = [sprites];
-    }
+    sprites = coerceArray(sprites);
     for (const s of sprites) {
       if (this.sprites.has(s)) {
         continue;
@@ -69,9 +67,7 @@ export default class PokemonSpriteSparkleHandler {
   }
 
   remove(sprites: Phaser.GameObjects.Sprite | Phaser.GameObjects.Sprite[]): void {
-    if (!Array.isArray(sprites)) {
-      sprites = [sprites];
-    }
+    sprites = coerceArray(sprites);
     for (const s of sprites) {
       this.sprites.delete(s);
     }

src/field/pokemon.ts

@@ -15,12 +15,8 @@ import { allMoves } from "#app/data/data-lists";
 import { MoveTarget } from "#enums/MoveTarget";
 import { MoveCategory } from "#enums/MoveCategory";
 import type { PokemonSpeciesForm } from "#app/data/pokemon-species";
-import {
-  default as PokemonSpecies,
-  getFusedSpeciesName,
-  getPokemonSpecies,
-  getPokemonSpeciesForm,
-} from "#app/data/pokemon-species";
+import { default as PokemonSpecies, getFusedSpeciesName, getPokemonSpeciesForm } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import { getStarterValueFriendshipCap, speciesStarterCosts } from "#app/data/balance/starters";
 import {
   NumberHolder,
@@ -38,9 +34,9 @@ import {
   deltaRgb,
   isBetween,
   randSeedFloat,
-  type nil,
   type Constructor,
   randSeedIntRange,
+  coerceArray,
 } from "#app/utils/common";
 import type { TypeDamageMultiplier } from "#app/data/type";
 import { getTypeDamageMultiplier, getTypeRgb } from "#app/data/type";
@@ -79,11 +75,12 @@ import {
 import { PokeballType } from "#enums/pokeball";
 import { Gender } from "#app/data/gender";
 import { Status, getRandomStatus } from "#app/data/status-effect";
-import type { SpeciesFormEvolution, SpeciesEvolutionCondition } from "#app/data/balance/pokemon-evolutions";
+import type { SpeciesFormEvolution } from "#app/data/balance/pokemon-evolutions";
 import {
   pokemonEvolutions,
   pokemonPrevolutions,
   FusionSpeciesFormEvolution,
+  validateShedinjaEvo,
 } from "#app/data/balance/pokemon-evolutions";
 import { reverseCompatibleTms, tmSpecies, tmPoolTiers } from "#app/data/balance/tms";
 import {
@@ -111,61 +108,23 @@ import { WeatherType } from "#enums/weather-type";
 import { NoCritTag, WeakenMoveScreenTag } from "#app/data/arena-tag";
 import { ArenaTagSide } from "#enums/arena-tag-side";
 import type { SuppressAbilitiesTag } from "#app/data/arena-tag";
-import type { Ability } from "#app/data/abilities/ability-class";
-import type { AbAttr } from "#app/data/abilities/ab-attrs/ab-attr";
+import type { Ability } from "#app/data/abilities/ability";
 import {
-  StatMultiplierAbAttr,
-  BlockCritAbAttr,
-  BonusCritAbAttr,
-  BypassBurnDamageReductionAbAttr,
-  FieldPriorityMoveImmunityAbAttr,
-  IgnoreOpponentStatStagesAbAttr,
-  MoveImmunityAbAttr,
-  PreDefendFullHpEndureAbAttr,
-  ReceivedMoveDamageMultiplierAbAttr,
-  StabBoostAbAttr,
-  StatusEffectImmunityAbAttr,
-  TypeImmunityAbAttr,
-  WeightMultiplierAbAttr,
   applyAbAttrs,
   applyStatMultiplierAbAttrs,
   applyPreApplyBattlerTagAbAttrs,
   applyPreAttackAbAttrs,
   applyPreDefendAbAttrs,
   applyPreSetStatusAbAttrs,
-  NoFusionAbilityAbAttr,
-  MultCritAbAttr,
-  IgnoreTypeImmunityAbAttr,
-  DamageBoostAbAttr,
-  IgnoreTypeStatusEffectImmunityAbAttr,
-  ConditionalCritAbAttr,
   applyFieldStatMultiplierAbAttrs,
-  FieldMultiplyStatAbAttr,
-  AddSecondStrikeAbAttr,
-  UserFieldStatusEffectImmunityAbAttr,
-  UserFieldBattlerTagImmunityAbAttr,
-  BattlerTagImmunityAbAttr,
-  MoveTypeChangeAbAttr,
-  FullHpResistTypeAbAttr,
   applyCheckTrappedAbAttrs,
-  CheckTrappedAbAttr,
-  InfiltratorAbAttr,
-  AlliedFieldDamageReductionAbAttr,
-  PostDamageAbAttr,
   applyPostDamageAbAttrs,
-  CommanderAbAttr,
   applyPostItemLostAbAttrs,
-  PostItemLostAbAttr,
   applyOnGainAbAttrs,
-  PreLeaveFieldAbAttr,
   applyPreLeaveFieldAbAttrs,
   applyOnLoseAbAttrs,
-  PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr,
   applyAllyStatMultiplierAbAttrs,
-  AllyStatMultiplierAbAttr,
-  MoveAbilityBypassAbAttr,
-  PreSummonAbAttr,
-} from "#app/data/abilities/ability";
+} from "#app/data/abilities/apply-ab-attrs";
 import { allAbilities } from "#app/data/data-lists";
 import type PokemonData from "#app/system/pokemon-data";
 import { BattlerIndex } from "#enums/battler-index";
@@ -192,7 +151,7 @@ import type { TrainerSlot } from "#enums/trainer-slot";
 import Overrides from "#app/overrides";
 import i18next from "i18next";
 import { speciesEggMoves } from "#app/data/balance/egg-moves";
-import { ModifierTier } from "#app/modifier/modifier-tier";
+import { ModifierTier } from "#enums/modifier-tier";
 import { applyChallenges } from "#app/data/challenge";
 import { ChallengeType } from "#enums/challenge-type";
 import { AbilityId } from "#enums/ability-id";
@@ -223,12 +182,14 @@ import { doShinySparkleAnim } from "#app/field/anims";
 import { MoveFlags } from "#enums/MoveFlags";
 import { timedEventManager } from "#app/global-event-manager";
 import { loadMoveAnimations } from "#app/sprites/pokemon-asset-loader";
+import { isVirtual, isIgnorePP, MoveUseMode } from "#enums/move-use-mode";
 import { FieldPosition } from "#enums/field-position";
 import { LearnMoveSituation } from "#enums/learn-move-situation";
 import { HitResult } from "#enums/hit-result";
 import { AiType } from "#enums/ai-type";
 import type { MoveResult } from "#enums/move-result";
 import { PokemonMove } from "#app/data/moves/pokemon-move";
+import type { AbAttrMap, AbAttrString } from "#app/@types/ability-types";
 
 /** Base typeclass for damage parameter methods, used for DRY */
 type damageParams = {
@@ -360,7 +321,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     super(globalScene, x, y);
 
     if (!species.isObtainable() && this.isPlayer()) {
-      throw `Cannot create a player Pokemon for species '${species.getName(formIndex)}'`;
+      throw `Cannot create a player Pokemon for species "${species.getName(formIndex)}"`;
     }
 
     this.species = species;
@@ -406,7 +367,6 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       this.metWave = dataSource.metWave ?? (this.metBiome === -1 ? -1 : 0);
       this.pauseEvolutions = dataSource.pauseEvolutions;
       this.pokerus = !!dataSource.pokerus;
-      this.evoCounter = dataSource.evoCounter ?? 0;
       this.fusionSpecies =
         dataSource.fusionSpecies instanceof PokemonSpecies
           ? dataSource.fusionSpecies
@@ -1392,8 +1352,9 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   /**
-   * Calculate the critical-hit stage of a move used against this pokemon by
-   * the given source
+   * Calculate the critical-hit stage of a move used **against** this pokemon by
+   * the given source.
+   *
    * @param source - The {@linkcode Pokemon} using the move
    * @param move - The {@linkcode Move} being used
    * @returns The final critical-hit stage value
@@ -1403,14 +1364,12 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     applyMoveAttrs("HighCritAttr", source, this, move, critStage);
     globalScene.applyModifiers(CritBoosterModifier, source.isPlayer(), source, critStage);
     globalScene.applyModifiers(TempCritBoosterModifier, source.isPlayer(), critStage);
-    applyAbAttrs(BonusCritAbAttr, source, null, false, critStage);
+    applyAbAttrs("BonusCritAbAttr", source, null, false, critStage);
     const critBoostTag = source.getTag(CritBoostTag);
     if (critBoostTag) {
-      if (critBoostTag instanceof DragonCheerTag) {
-        critStage.value += critBoostTag.typesOnAdd.includes(PokemonType.DRAGON) ? 2 : 1;
-      } else {
-        critStage.value += 2;
-      }
+      // Dragon cheer only gives +1 crit stage to non-dragon types
+      critStage.value +=
+        critBoostTag instanceof DragonCheerTag && !critBoostTag.typesOnAdd.includes(PokemonType.DRAGON) ? 1 : 2;
     }
 
     console.log(`crit stage: +${critStage.value}`);
@@ -1464,19 +1423,27 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     // The Ruin abilities here are never ignored, but they reveal themselves on summon anyway
     const fieldApplied = new BooleanHolder(false);
     for (const pokemon of globalScene.getField(true)) {
-      applyFieldStatMultiplierAbAttrs(FieldMultiplyStatAbAttr, pokemon, stat, statValue, this, fieldApplied, simulated);
+      applyFieldStatMultiplierAbAttrs(
+        "FieldMultiplyStatAbAttr",
+        pokemon,
+        stat,
+        statValue,
+        this,
+        fieldApplied,
+        simulated,
+      );
       if (fieldApplied.value) {
         break;
       }
     }
     if (!ignoreAbility) {
-      applyStatMultiplierAbAttrs(StatMultiplierAbAttr, this, stat, statValue, simulated);
+      applyStatMultiplierAbAttrs("StatMultiplierAbAttr", this, stat, statValue, simulated);
     }
 
     const ally = this.getAlly();
     if (!isNullOrUndefined(ally)) {
       applyAllyStatMultiplierAbAttrs(
-        AllyStatMultiplierAbAttr,
+        "AllyStatMultiplierAbAttr",
         ally,
         stat,
         statValue,
@@ -1803,9 +1770,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     let overrideArray: MoveId | Array<MoveId> = this.isPlayer()
       ? Overrides.MOVESET_OVERRIDE
       : Overrides.OPP_MOVESET_OVERRIDE;
-    if (!Array.isArray(overrideArray)) {
-      overrideArray = [overrideArray];
-    }
+    overrideArray = coerceArray(overrideArray);
     if (overrideArray.length > 0) {
       if (!this.isPlayer()) {
         this.moveset = [];
@@ -2059,15 +2024,11 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
    * @param ignoreOverride - Whether to ignore ability changing effects; Default `false`
    * @returns An array of all the ability attributes on this ability.
    */
-  public getAbilityAttrs<T extends AbAttr = AbAttr>(
-    attrType: { new (...args: any[]): T },
-    canApply = true,
-    ignoreOverride = false,
-  ): T[] {
-    const abilityAttrs: T[] = [];
+  public getAbilityAttrs<T extends AbAttrString>(attrType: T, canApply = true, ignoreOverride = false): AbAttrMap[T][] {
+    const abilityAttrs: AbAttrMap[T][] = [];
 
     if (!canApply || this.canApplyAbility()) {
-      abilityAttrs.push(...this.getAbility(ignoreOverride).getAttrs<T>(attrType));
+      abilityAttrs.push(...this.getAbility(ignoreOverride).getAttrs(attrType));
     }
 
     if (!canApply || this.canApplyAbility(true)) {
@@ -2152,7 +2113,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       return false;
     }
     const ability = !passive ? this.getAbility() : this.getPassiveAbility();
-    if (this.isFusion() && ability.hasAttr(NoFusionAbilityAbAttr)) {
+    if (this.isFusion() && ability.hasAttr("NoFusionAbilityAbAttr")) {
       return false;
     }
     const arena = globalScene?.arena;
@@ -2163,10 +2124,10 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       return false;
     }
     const suppressAbilitiesTag = arena.getTag(ArenaTagType.NEUTRALIZING_GAS) as SuppressAbilitiesTag;
-    const suppressOffField = ability.hasAttr(PreSummonAbAttr);
+    const suppressOffField = ability.hasAttr("PreSummonAbAttr");
     if ((this.isOnField() || suppressOffField) && suppressAbilitiesTag && !suppressAbilitiesTag.isBeingRemoved()) {
-      const thisAbilitySuppressing = ability.hasAttr(PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr);
-      const hasSuppressingAbility = this.hasAbilityWithAttr(PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr, false);
+      const thisAbilitySuppressing = ability.hasAttr("PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr");
+      const hasSuppressingAbility = this.hasAbilityWithAttr("PreLeaveFieldRemoveSuppressAbilitiesSourceAbAttr", false);
       // Neutralizing gas is up - suppress abilities unless they are unsuppressable or this pokemon is responsible for the gas
       // (Balance decided that the other ability of a neutralizing gas pokemon should not be neutralized)
       // If the ability itself is neutralizing gas, don't suppress it (handled through arena tag)
@@ -2207,13 +2168,17 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
    * @param ignoreOverride Whether to ignore ability changing effects; default `false`
    * @returns `true` if an ability with the given {@linkcode AbAttr} is present and active
    */
-  public hasAbilityWithAttr(attrType: Constructor<AbAttr>, canApply = true, ignoreOverride = false): boolean {
+  public hasAbilityWithAttr(attrType: AbAttrString, canApply = true, ignoreOverride = false): boolean {
     if ((!canApply || this.canApplyAbility()) && this.getAbility(ignoreOverride).hasAttr(attrType)) {
       return true;
     }
     return this.hasPassive() && (!canApply || this.canApplyAbility(true)) && this.getPassiveAbility().hasAttr(attrType);
   }
 
+  public getAbilityPriorities(): [number, number] {
+    return [this.getAbility().postSummonPriority, this.getPassiveAbility().postSummonPriority];
+  }
+
   /**
    * Gets the weight of the Pokemon with subtractive modifiers (Autotomize) happening first
    * and then multiplicative modifiers happening after (Heavy Metal and Light Metal)
@@ -2229,7 +2194,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     const weight = new NumberHolder(this.species.weight - weightRemoved);
 
     // This will trigger the ability overlay so only call this function when necessary
-    applyAbAttrs(WeightMultiplierAbAttr, this, null, false, weight);
+    applyAbAttrs("WeightMultiplierAbAttr", this, null, false, weight);
     return Math.max(minWeight, weight.value);
   }
 
@@ -2316,7 +2281,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     const opposingField = opposingFieldUnfiltered.filter(enemyPkm => enemyPkm.switchOutStatus === false);
 
     for (const opponent of opposingField) {
-      applyCheckTrappedAbAttrs(CheckTrappedAbAttr, opponent, trappedByAbility, this, trappedAbMessages, simulated);
+      applyCheckTrappedAbAttrs("CheckTrappedAbAttr", opponent, trappedByAbility, this, trappedAbMessages, simulated);
     }
 
     const side = this.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
@@ -2338,7 +2303,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     const moveTypeHolder = new NumberHolder(move.type);
 
     applyMoveAttrs("VariableMoveTypeAttr", this, null, move, moveTypeHolder);
-    applyPreAttackAbAttrs(MoveTypeChangeAbAttr, this, null, move, simulated, moveTypeHolder);
+    applyPreAttackAbAttrs("MoveTypeChangeAbAttr", this, null, move, simulated, moveTypeHolder);
 
     // If the user is terastallized and the move is tera blast, or tera starstorm that is stellar type,
     // then bypass the check for ion deluge and electrify
@@ -2403,16 +2368,16 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
     const cancelledHolder = cancelled ?? new BooleanHolder(false);
     if (!ignoreAbility) {
-      applyPreDefendAbAttrs(TypeImmunityAbAttr, this, source, move, cancelledHolder, simulated, typeMultiplier);
+      applyPreDefendAbAttrs("TypeImmunityAbAttr", this, source, move, cancelledHolder, simulated, typeMultiplier);
 
       if (!cancelledHolder.value) {
-        applyPreDefendAbAttrs(MoveImmunityAbAttr, this, source, move, cancelledHolder, simulated, typeMultiplier);
+        applyPreDefendAbAttrs("MoveImmunityAbAttr", this, source, move, cancelledHolder, simulated, typeMultiplier);
       }
 
       if (!cancelledHolder.value) {
         const defendingSidePlayField = this.isPlayer() ? globalScene.getPlayerField() : globalScene.getEnemyField();
         defendingSidePlayField.forEach(p =>
-          applyPreDefendAbAttrs(FieldPriorityMoveImmunityAbAttr, p, source, move, cancelledHolder),
+          applyPreDefendAbAttrs("FieldPriorityMoveImmunityAbAttr", p, source, move, cancelledHolder),
         );
       }
     }
@@ -2427,7 +2392,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
     // Apply Tera Shell's effect to attacks after all immunities are accounted for
     if (!ignoreAbility && move.category !== MoveCategory.STATUS) {
-      applyPreDefendAbAttrs(FullHpResistTypeAbAttr, this, source, move, cancelledHolder, simulated, typeMultiplier);
+      applyPreDefendAbAttrs("FullHpResistTypeAbAttr", this, source, move, cancelledHolder, simulated, typeMultiplier);
     }
 
     if (move.category === MoveCategory.STATUS && move.hitsSubstitute(source, this)) {
@@ -2480,8 +2445,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
         }
         if (source) {
           const ignoreImmunity = new BooleanHolder(false);
-          if (source.isActive(true) && source.hasAbilityWithAttr(IgnoreTypeImmunityAbAttr)) {
-            applyAbAttrs(IgnoreTypeImmunityAbAttr, source, ignoreImmunity, simulated, moveType, defType);
+          if (source.isActive(true) && source.hasAbilityWithAttr("IgnoreTypeImmunityAbAttr")) {
+            applyAbAttrs("IgnoreTypeImmunityAbAttr", source, ignoreImmunity, simulated, moveType, defType);
           }
           if (ignoreImmunity.value) {
             if (multiplier.value === 0) {
@@ -2566,34 +2531,22 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     if (pokemonEvolutions.hasOwnProperty(this.species.speciesId)) {
       const evolutions = pokemonEvolutions[this.species.speciesId];
       for (const e of evolutions) {
-        if (
-          !e.item &&
-          this.level >= e.level &&
-          (isNullOrUndefined(e.preFormKey) || this.getFormKey() === e.preFormKey)
-        ) {
-          if (e.condition === null || (e.condition as SpeciesEvolutionCondition).predicate(this)) {
+        if (e.validate(this)) {
           return e;
         }
       }
     }
-    }
 
     if (this.isFusion() && this.fusionSpecies && pokemonEvolutions.hasOwnProperty(this.fusionSpecies.speciesId)) {
       const fusionEvolutions = pokemonEvolutions[this.fusionSpecies.speciesId].map(
         e => new FusionSpeciesFormEvolution(this.species.speciesId, e),
       );
       for (const fe of fusionEvolutions) {
-        if (
-          !fe.item &&
-          this.level >= fe.level &&
-          (isNullOrUndefined(fe.preFormKey) || this.getFusionFormKey() === fe.preFormKey)
-        ) {
-          if (fe.condition === null || (fe.condition as SpeciesEvolutionCondition).predicate(this)) {
+        if (fe.validate(this)) {
           return fe;
         }
       }
     }
-    }
 
     return null;
   }
@@ -2832,17 +2785,12 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
    */
   public trySetShinySeed(thresholdOverride?: number, applyModifiersToOverride?: boolean): boolean {
     if (!this.shiny) {
-      const shinyThreshold = new NumberHolder(BASE_SHINY_CHANCE);
-      if (thresholdOverride === undefined || applyModifiersToOverride) {
-        if (thresholdOverride !== undefined && applyModifiersToOverride) {
-          shinyThreshold.value = thresholdOverride;
-        }
+      const shinyThreshold = new NumberHolder(thresholdOverride ?? BASE_SHINY_CHANCE);
+      if (applyModifiersToOverride) {
         if (timedEventManager.isEventActive()) {
           shinyThreshold.value *= timedEventManager.getShinyMultiplier();
         }
         globalScene.applyModifiers(ShinyRateBoosterModifier, true, shinyThreshold);
-      } else {
-        shinyThreshold.value = thresholdOverride;
       }
 
       this.shiny = randSeedInt(65536) < shinyThreshold.value;
@@ -2911,16 +2859,11 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     if (!this.species.abilityHidden) {
       return false;
     }
-    const haThreshold = new NumberHolder(BASE_HIDDEN_ABILITY_CHANCE);
-    if (thresholdOverride === undefined || applyModifiersToOverride) {
-      if (thresholdOverride !== undefined && applyModifiersToOverride) {
-        haThreshold.value = thresholdOverride;
-      }
+    const haThreshold = new NumberHolder(thresholdOverride ?? BASE_HIDDEN_ABILITY_CHANCE);
+    if (applyModifiersToOverride) {
       if (!this.hasTrainer()) {
         globalScene.applyModifiers(HiddenAbilityRateBoosterModifier, true, haThreshold);
       }
-    } else {
-      haThreshold.value = thresholdOverride;
     }
 
     if (randSeedInt(65536) < haThreshold.value) {
@@ -3184,7 +3127,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       while (rand > stabMovePool[index][1]) {
         rand -= stabMovePool[index++][1];
       }
-      this.moveset.push(new PokemonMove(stabMovePool[index][0], 0, 0));
+      this.moveset.push(new PokemonMove(stabMovePool[index][0]));
     }
 
     while (baseWeights.length > this.moveset.length && this.moveset.length < 4) {
@@ -3237,7 +3180,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       while (rand > movePool[index][1]) {
         rand -= movePool[index++][1];
       }
-      this.moveset.push(new PokemonMove(movePool[index][0], 0, 0));
+      this.moveset.push(new PokemonMove(movePool[index][0]));
     }
 
     // Trigger FormChange, except for enemy Pokemon during Mystery Encounters, to avoid crashes
@@ -3432,7 +3375,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
         }
       }
       if (!ignoreOppAbility) {
-        applyAbAttrs(IgnoreOpponentStatStagesAbAttr, opponent, null, simulated, stat, ignoreStatStage);
+        applyAbAttrs("IgnoreOpponentStatStagesAbAttr", opponent, null, simulated, stat, ignoreStatStage);
       }
       if (move) {
         applyMoveAttrs("IgnoreOpponentStatStagesAttr", this, opponent, move, ignoreStatStage);
@@ -3471,8 +3414,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     const ignoreAccStatStage = new BooleanHolder(false);
     const ignoreEvaStatStage = new BooleanHolder(false);
 
-    applyAbAttrs(IgnoreOpponentStatStagesAbAttr, target, null, false, Stat.ACC, ignoreAccStatStage);
-    applyAbAttrs(IgnoreOpponentStatStagesAbAttr, this, null, false, Stat.EVA, ignoreEvaStatStage);
+    applyAbAttrs("IgnoreOpponentStatStagesAbAttr", target, null, false, Stat.ACC, ignoreAccStatStage);
+    applyAbAttrs("IgnoreOpponentStatStagesAbAttr", this, null, false, Stat.EVA, ignoreEvaStatStage);
     applyMoveAttrs("IgnoreOpponentStatStagesAttr", this, target, sourceMove, ignoreEvaStatStage);
 
     globalScene.applyModifiers(TempStatStageBoosterModifier, this.isPlayer(), Stat.ACC, userAccStage);
@@ -3492,16 +3435,33 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
           : 3 / (3 + Math.min(targetEvaStage.value - userAccStage.value, 6));
     }
 
-    applyStatMultiplierAbAttrs(StatMultiplierAbAttr, this, Stat.ACC, accuracyMultiplier, false, sourceMove);
+    applyStatMultiplierAbAttrs("StatMultiplierAbAttr", this, Stat.ACC, accuracyMultiplier, false, sourceMove);
 
     const evasionMultiplier = new NumberHolder(1);
-    applyStatMultiplierAbAttrs(StatMultiplierAbAttr, target, Stat.EVA, evasionMultiplier);
+    applyStatMultiplierAbAttrs("StatMultiplierAbAttr", target, Stat.EVA, evasionMultiplier);
 
     const ally = this.getAlly();
     if (!isNullOrUndefined(ally)) {
-      const ignore = this.hasAbilityWithAttr(MoveAbilityBypassAbAttr) || sourceMove.hasFlag(MoveFlags.IGNORE_ABILITIES);
-      applyAllyStatMultiplierAbAttrs(AllyStatMultiplierAbAttr, ally, Stat.ACC, accuracyMultiplier, false, this, ignore);
-      applyAllyStatMultiplierAbAttrs(AllyStatMultiplierAbAttr, ally, Stat.EVA, evasionMultiplier, false, this, ignore);
+      const ignore =
+        this.hasAbilityWithAttr("MoveAbilityBypassAbAttr") || sourceMove.hasFlag(MoveFlags.IGNORE_ABILITIES);
+      applyAllyStatMultiplierAbAttrs(
+        "AllyStatMultiplierAbAttr",
+        ally,
+        Stat.ACC,
+        accuracyMultiplier,
+        false,
+        this,
+        ignore,
+      );
+      applyAllyStatMultiplierAbAttrs(
+        "AllyStatMultiplierAbAttr",
+        ally,
+        Stat.EVA,
+        evasionMultiplier,
+        false,
+        this,
+        ignore,
+      );
     }
 
     return accuracyMultiplier.value / evasionMultiplier.value;
@@ -3616,7 +3576,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     applyMoveAttrs("CombinedPledgeStabBoostAttr", source, this, move, stabMultiplier);
 
     if (!ignoreSourceAbility) {
-      applyAbAttrs(StabBoostAbAttr, source, null, simulated, stabMultiplier);
+      applyAbAttrs("StabBoostAbAttr", source, null, simulated, stabMultiplier);
     }
 
     if (source.isTerastallized && sourceTeraType === moveType && moveType !== PokemonType.STELLAR) {
@@ -3765,7 +3725,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     );
     if (!ignoreSourceAbility) {
       applyPreAttackAbAttrs(
-        AddSecondStrikeAbAttr,
+        "AddSecondStrikeAbAttr",
         source,
         this,
         move,
@@ -3783,7 +3743,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
     /** The damage multiplier when the given move critically hits */
     const criticalMultiplier = new NumberHolder(isCritical ? 1.5 : 1);
-    applyAbAttrs(MultCritAbAttr, source, null, simulated, criticalMultiplier);
+    applyAbAttrs("MultCritAbAttr", source, null, simulated, criticalMultiplier);
 
     /**
      * A multiplier for random damage spread in the range [0.85, 1]
@@ -3804,7 +3764,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     ) {
       const burnDamageReductionCancelled = new BooleanHolder(false);
       if (!ignoreSourceAbility) {
-        applyAbAttrs(BypassBurnDamageReductionAbAttr, source, burnDamageReductionCancelled, simulated);
+        applyAbAttrs("BypassBurnDamageReductionAbAttr", source, burnDamageReductionCancelled, simulated);
       }
       if (!burnDamageReductionCancelled.value) {
         burnMultiplier = 0.5;
@@ -3868,7 +3828,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
     /** Doubles damage if the attacker has Tinted Lens and is using a resisted move */
     if (!ignoreSourceAbility) {
-      applyPreAttackAbAttrs(DamageBoostAbAttr, source, this, move, simulated, damage);
+      applyPreAttackAbAttrs("DamageBoostAbAttr", source, this, move, simulated, damage);
     }
 
     /** Apply the enemy's Damage and Resistance tokens */
@@ -3881,12 +3841,12 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
     /** Apply this Pokemon's post-calc defensive modifiers (e.g. Fur Coat) */
     if (!ignoreAbility) {
-      applyPreDefendAbAttrs(ReceivedMoveDamageMultiplierAbAttr, this, source, move, cancelled, simulated, damage);
+      applyPreDefendAbAttrs("ReceivedMoveDamageMultiplierAbAttr", this, source, move, cancelled, simulated, damage);
 
       const ally = this.getAlly();
       /** Additionally apply friend guard damage reduction if ally has it. */
       if (globalScene.currentBattle.double && !isNullOrUndefined(ally) && ally.isActive(true)) {
-        applyPreDefendAbAttrs(AlliedFieldDamageReductionAbAttr, ally, source, move, cancelled, simulated, damage);
+        applyPreDefendAbAttrs("AlliedFieldDamageReductionAbAttr", ally, source, move, cancelled, simulated, damage);
       }
     }
 
@@ -3894,7 +3854,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     applyMoveAttrs("ModifiedDamageAttr", source, this, move, damage);
 
     if (this.isFullHp() && !ignoreAbility) {
-      applyPreDefendAbAttrs(PreDefendFullHpEndureAbAttr, this, source, move, cancelled, false, damage);
+      applyPreDefendAbAttrs("PreDefendFullHpEndureAbAttr", this, source, move, cancelled, false, damage);
     }
 
     // debug message for when damage is applied (i.e. not simulated)
@@ -3918,33 +3878,39 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     };
   }
 
-  /** Calculate whether the given move critically hits this pokemon
+  /**
+   * Determine whether the given move will score a critical hit **against** this Pokemon.
    * @param source - The {@linkcode Pokemon} using the move
    * @param move - The {@linkcode Move} being used
-   * @param simulated - If `true`, suppresses changes to game state during calculation (defaults to `true`)
-   * @returns whether the move critically hits the pokemon
+   * @returns Whether the move will critically hit the defender.
    */
-  getCriticalHitResult(source: Pokemon, move: Move, simulated = true): boolean {
-    const defendingSide = this.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
-    const noCritTag = globalScene.arena.getTagOnSide(NoCritTag, defendingSide);
-    if (noCritTag || Overrides.NEVER_CRIT_OVERRIDE || move.hasAttr("FixedDamageAttr")) {
+  getCriticalHitResult(source: Pokemon, move: Move): boolean {
+    if (move.hasAttr("FixedDamageAttr")) {
+      // fixed damage moves (Dragon Rage, etc.) will nevet crit
       return false;
     }
-    const isCritical = new BooleanHolder(false);
 
-    if (source.getTag(BattlerTagType.ALWAYS_CRIT)) {
-      isCritical.value = true;
-    }
-    applyMoveAttrs("CritOnlyAttr", source, this, move, isCritical);
-    applyAbAttrs(ConditionalCritAbAttr, source, null, simulated, isCritical, this, move);
-    if (!isCritical.value) {
-      const critChance = [24, 8, 2, 1][Math.max(0, Math.min(this.getCritStage(source, move), 3))];
-      isCritical.value = critChance === 1 || !globalScene.randBattleSeedInt(critChance);
-    }
+    const alwaysCrit = new BooleanHolder(false);
+    applyMoveAttrs("CritOnlyAttr", source, this, move, alwaysCrit);
+    applyAbAttrs("ConditionalCritAbAttr", source, null, false, alwaysCrit, this, move);
+    const alwaysCritTag = !!source.getTag(BattlerTagType.ALWAYS_CRIT);
+    const critChance = [24, 8, 2, 1][Phaser.Math.Clamp(this.getCritStage(source, move), 0, 3)];
 
-    applyAbAttrs(BlockCritAbAttr, this, null, simulated, isCritical);
+    let isCritical = alwaysCrit.value || alwaysCritTag || critChance === 1;
 
-    return isCritical.value;
+    // If we aren't already guaranteed to crit, do a random roll & check overrides
+    isCritical ||= Overrides.CRITICAL_HIT_OVERRIDE ?? globalScene.randBattleSeedInt(critChance) === 0;
+
+    // apply crit block effects from lucky chant & co., overriding previous effects
+    const blockCrit = new BooleanHolder(false);
+    applyAbAttrs("BlockCritAbAttr", this, null, false, blockCrit);
+    const blockCritTag = globalScene.arena.getTagOnSide(
+      NoCritTag,
+      this.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY,
+    );
+    isCritical &&= !blockCritTag && !blockCrit.value; // need to roll a crit and not be blocked by either crit prevention effect
+
+    return isCritical;
   }
 
   /**
@@ -4049,7 +4015,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
      * Multi-hits are handled in move-effect-phase.ts for PostDamageAbAttr
      */
     if (!source || source.turnData.hitCount <= 1) {
-      applyPostDamageAbAttrs(PostDamageAbAttr, this, damage, this.hasPassive(), false, [], source);
+      applyPostDamageAbAttrs("PostDamageAbAttr", this, damage, this.hasPassive(), false, [], source);
     }
     return damage;
   }
@@ -4097,11 +4063,11 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     const stubTag = new BattlerTag(tagType, 0, 0);
 
     const cancelled = new BooleanHolder(false);
-    applyPreApplyBattlerTagAbAttrs(BattlerTagImmunityAbAttr, this, stubTag, cancelled, true);
+    applyPreApplyBattlerTagAbAttrs("BattlerTagImmunityAbAttr", this, stubTag, cancelled, true);
 
     const userField = this.getAlliedField();
     userField.forEach(pokemon =>
-      applyPreApplyBattlerTagAbAttrs(UserFieldBattlerTagImmunityAbAttr, pokemon, stubTag, cancelled, true, this),
+      applyPreApplyBattlerTagAbAttrs("UserFieldBattlerTagImmunityAbAttr", pokemon, stubTag, cancelled, true, this),
     );
 
     return !cancelled.value;
@@ -4117,13 +4083,13 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     const newTag = getBattlerTag(tagType, turnCount, sourceMove!, sourceId!); // TODO: are the bangs correct?
 
     const cancelled = new BooleanHolder(false);
-    applyPreApplyBattlerTagAbAttrs(BattlerTagImmunityAbAttr, this, newTag, cancelled);
+    applyPreApplyBattlerTagAbAttrs("BattlerTagImmunityAbAttr", this, newTag, cancelled);
     if (cancelled.value) {
       return false;
     }
 
     for (const pokemon of this.getAlliedField()) {
-      applyPreApplyBattlerTagAbAttrs(UserFieldBattlerTagImmunityAbAttr, pokemon, newTag, cancelled, false, this);
+      applyPreApplyBattlerTagAbAttrs("UserFieldBattlerTagImmunityAbAttr", pokemon, newTag, cancelled, false, this);
       if (cancelled.value) {
         return false;
       }
@@ -4139,7 +4105,10 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   /**@overload */
-  getTag(tagType: BattlerTagType.GRUDGE): GrudgeTag | nil;
+  getTag(tagType: BattlerTagType.GRUDGE): GrudgeTag | undefined;
+
+  /** @overload */
+  getTag(tagType: BattlerTagType.SUBSTITUTE): SubstituteTag | undefined;
 
   /** @overload */
   getTag(tagType: BattlerTagType): BattlerTag | undefined;
@@ -4353,10 +4322,41 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     return moveHistory.slice(0).reverse();
   }
 
+  /**
+   * Return the most recently executed {@linkcode TurnMove} this {@linkcode Pokemon} has used that is:
+   * - Not {@linkcode MoveId.NONE}
+   * - Non-virtual ({@linkcode MoveUseMode | useMode} < {@linkcode MoveUseMode.INDIRECT})
+   * @param ignoreStruggle - Whether to additionally ignore {@linkcode Moves.STRUGGLE}; default `false`
+   * @param ignoreFollowUp - Whether to ignore moves with a use type of {@linkcode MoveUseMode.FOLLOW_UP}
+   * (e.g. ones called by Copycat/Mirror Move); default `true`.
+   * @returns The last move this Pokemon has used satisfying the aforementioned conditions,
+   * or `undefined` if no applicable moves have been used since switching in.
+   */
+  getLastNonVirtualMove(ignoreStruggle = false, ignoreFollowUp = true): TurnMove | undefined {
+    return this.getLastXMoves(-1).find(
+      m =>
+        m.move !== MoveId.NONE &&
+        (!ignoreStruggle || m.move !== MoveId.STRUGGLE) &&
+        (!isVirtual(m.useMode) || (!ignoreFollowUp && m.useMode === MoveUseMode.FOLLOW_UP)),
+    );
+  }
+
+  /**
+   * Return this Pokemon's move queue, consisting of all the moves it is slated to perform.
+   * @returns An array of {@linkcode TurnMove}, as described above
+   */
   getMoveQueue(): TurnMove[] {
     return this.summonData.moveQueue;
   }
 
+  /**
+   * Add a new entry to the end of this Pokemon's move queue.
+   * @param queuedMove - A {@linkcode TurnMove} to push to this Pokemon's queue.
+   */
+  pushMoveQueue(queuedMove: TurnMove): void {
+    this.summonData.moveQueue.push(queuedMove);
+  }
+
   changeForm(formChange: SpeciesFormChange): Promise<void> {
     return new Promise(resolve => {
       this.formIndex = Math.max(
@@ -4412,14 +4412,16 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   // biome-ignore lint: there are a ton of issues..
   faintCry(callback: Function): void {
     if (this.fusionSpecies && this.getSpeciesForm() !== this.getFusionSpeciesForm()) {
-      return this.fusionFaintCry(callback);
+      this.fusionFaintCry(callback);
+      return;
     }
 
     const key = this.species.getCryKey(this.formIndex);
     let rate = 0.85;
     const cry = globalScene.playSound(key, { rate: rate }) as AnySound;
     if (!cry || globalScene.fieldVolume === 0) {
-      return callback();
+      callback();
+      return;
     }
     const sprite = this.getSprite();
     const tintSprite = this.getTintSprite();
@@ -4487,7 +4489,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       rate: rate,
     }) as AnySound;
     if (!cry || !fusionCry || globalScene.fieldVolume === 0) {
-      return callback();
+      callback();
+      return;
     }
     fusionCry.stop();
     duration = Math.min(duration, fusionCry.totalDuration * 1000);
@@ -4643,7 +4646,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
           // Check if the source Pokemon has an ability that cancels the Poison/Toxic immunity
           const cancelImmunity = new BooleanHolder(false);
           if (sourcePokemon) {
-            applyAbAttrs(IgnoreTypeStatusEffectImmunityAbAttr, sourcePokemon, cancelImmunity, false, effect, defType);
+            applyAbAttrs("IgnoreTypeStatusEffectImmunityAbAttr", sourcePokemon, cancelImmunity, false, effect, defType);
             if (cancelImmunity.value) {
               return false;
             }
@@ -4692,14 +4695,14 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     }
 
     const cancelled = new BooleanHolder(false);
-    applyPreSetStatusAbAttrs(StatusEffectImmunityAbAttr, this, effect, cancelled, quiet);
+    applyPreSetStatusAbAttrs("StatusEffectImmunityAbAttr", this, effect, cancelled, quiet);
     if (cancelled.value) {
       return false;
     }
 
     for (const pokemon of this.getAlliedField()) {
       applyPreSetStatusAbAttrs(
-        UserFieldStatusEffectImmunityAbAttr,
+        "UserFieldStatusEffectImmunityAbAttr",
         pokemon,
         effect,
         cancelled,
@@ -4856,7 +4859,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     if (globalScene.arena.getTagOnSide(ArenaTagType.SAFEGUARD, defendingSide)) {
       const bypassed = new BooleanHolder(false);
       if (attacker) {
-        applyAbAttrs(InfiltratorAbAttr, attacker, null, false, bypassed);
+        applyAbAttrs("InfiltratorAbAttr", attacker, null, false, bypassed);
       }
       return !bypassed.value;
     }
@@ -4880,7 +4883,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
     // If this Pokemon has Commander and Dondozo as an active ally, hide this Pokemon's sprite.
     if (
-      this.hasAbilityWithAttr(CommanderAbAttr) &&
+      this.hasAbilityWithAttr("CommanderAbAttr") &&
       globalScene.currentBattle.double &&
       this.getAlly()?.species.speciesId === SpeciesId.DONDOZO
     ) {
@@ -5405,7 +5408,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       this.hideInfo();
     }
     // Trigger abilities that activate upon leaving the field
-    applyPreLeaveFieldAbAttrs(PreLeaveFieldAbAttr, this);
+    applyPreLeaveFieldAbAttrs("PreLeaveFieldAbAttr", this);
     this.setSwitchOutStatus(true);
     globalScene.triggerPokemonFormChange(this, SpeciesFormChangeActiveTrigger, true);
     globalScene.field.remove(this, destroy);
@@ -5465,7 +5468,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       globalScene.removeModifier(heldItem, this.isEnemy());
     }
     if (forBattle) {
-      applyPostItemLostAbAttrs(PostItemLostAbAttr, this, false);
+      applyPostItemLostAbAttrs("PostItemLostAbAttr", this, false);
     }
 
     return true;
@@ -5485,6 +5488,13 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     }
     this.turnData.berriesEaten.push(berryType);
   }
+
+  getPersistentTreasureCount(): number {
+    return (
+      this.getHeldItems().filter(m => m.is("DamageMoneyRewardModifier")).length +
+      globalScene.findModifiers(m => m.is("MoneyMultiplierModifier") || m.is("ExtraModifierModifier")).length
+    );
+  }
 }
 
 export class PlayerPokemon extends Pokemon {
@@ -5823,7 +5833,7 @@ export class PlayerPokemon extends Pokemon {
     if (evoSpecies?.speciesId === SpeciesId.NINCADA && evolution.speciesId === SpeciesId.NINJASK) {
       const newEvolution = pokemonEvolutions[evoSpecies.speciesId][1];
 
-      if (newEvolution.condition?.predicate(this)) {
+      if (validateShedinjaEvo()) {
         const newPokemon = globalScene.addPlayerPokemon(
           this.species,
           this.level,
@@ -5853,7 +5863,6 @@ export class PlayerPokemon extends Pokemon {
         newPokemon.fusionLuck = this.fusionLuck;
         newPokemon.fusionTeraType = this.fusionTeraType;
         newPokemon.usedTMs = this.usedTMs;
-        newPokemon.evoCounter = this.evoCounter;
 
         globalScene.getPlayerParty().push(newPokemon);
         newPokemon.evolve(!isFusion ? newEvolution : new FusionSpeciesFormEvolution(this.id, newEvolution), evoSpecies);
@@ -5942,7 +5951,6 @@ export class PlayerPokemon extends Pokemon {
     this.fusionGender = pokemon.gender;
     this.fusionLuck = pokemon.luck;
     this.fusionCustomPokemonData = pokemon.customPokemonData;
-    this.evoCounter = Math.max(pokemon.evoCounter, this.evoCounter);
     if (pokemon.pauseEvolutions || this.pauseEvolutions) {
       this.pauseEvolutions = true;
     }
@@ -6011,7 +6019,7 @@ export class PlayerPokemon extends Pokemon {
   copyMoveset(): PokemonMove[] {
     const newMoveset: PokemonMove[] = [];
     this.moveset.forEach(move => {
-      newMoveset.push(new PokemonMove(move.moveId, 0, move.ppUp, move.virtual, move.maxPpOverride));
+      newMoveset.push(new PokemonMove(move.moveId, 0, move.ppUp, move.maxPpOverride));
     });
 
     return newMoveset;
@@ -6098,18 +6106,6 @@ export class EnemyPokemon extends Pokemon {
 
       this.luck = (this.shiny ? this.variant + 1 : 0) + (this.fusionShiny ? this.fusionVariant + 1 : 0);
 
-      let prevolution: SpeciesId;
-      let speciesId = species.speciesId;
-      while ((prevolution = pokemonPrevolutions[speciesId])) {
-        const evolution = pokemonEvolutions[prevolution].find(
-          pe => pe.speciesId === speciesId && (!pe.evoFormKey || pe.evoFormKey === this.getFormKey()),
-        );
-        if (evolution?.condition?.enforceFunc) {
-          evolution.condition.enforceFunc(this);
-        }
-        speciesId = prevolution;
-      }
-
       if (this.hasTrainer() && globalScene.currentBattle) {
         const { waveIndex } = globalScene.currentBattle;
         const ivs: number[] = [];
@@ -6191,33 +6187,39 @@ export class EnemyPokemon extends Pokemon {
    * the Pokemon the move will target.
    * @returns this Pokemon's next move in the format {move, moveTargets}
    */
+  // TODO: split this up and move it elsewhere
   getNextMove(): TurnMove {
-    // If this Pokemon has a move already queued, return it.
+    // If this Pokemon has a usable move already queued, return it,
+    // removing all unusable moves before it in the queue.
     const moveQueue = this.getMoveQueue();
-    if (moveQueue.length !== 0) {
-      const queuedMove = moveQueue[0];
-      if (queuedMove) {
-        const moveIndex = this.getMoveset().findIndex(m => m.moveId === queuedMove.move);
-        if (
-          (moveIndex > -1 && this.getMoveset()[moveIndex].isUsable(this, queuedMove.ignorePP)) ||
-          queuedMove.virtual
-        ) {
+    for (const [i, queuedMove] of moveQueue.entries()) {
+      const movesetMove = this.getMoveset().find(m => m.moveId === queuedMove.move);
+      // If the queued move was called indirectly, ignore all PP and usability checks.
+      // Otherwise, ensure that the move being used is actually usable & in our moveset.
+      // TODO: What should happen if a pokemon forgets a charging move mid-use?
+      if (isVirtual(queuedMove.useMode) || movesetMove?.isUsable(this, isIgnorePP(queuedMove.useMode))) {
+        moveQueue.splice(0, i); // TODO: This should not be done here
         return queuedMove;
       }
-        this.getMoveQueue().shift();
-        return this.getNextMove();
-      }
     }
 
+    // We went through the entire queue without a match; clear the entire thing.
+    this.summonData.moveQueue = [];
+
     // Filter out any moves this Pokemon cannot use
     let movePool = this.getMoveset().filter(m => m.isUsable(this));
     // If no moves are left, use Struggle. Otherwise, continue with move selection
     if (movePool.length) {
       // If there's only 1 move in the move pool, use it.
       if (movePool.length === 1) {
-        return { move: movePool[0].moveId, targets: this.getNextTargets(movePool[0].moveId) };
+        return {
+          move: movePool[0].moveId,
+          targets: this.getNextTargets(movePool[0].moveId),
+          useMode: MoveUseMode.NORMAL,
+        };
       }
       // If a move is forced because of Encore, use it.
+      // Said moves are executed normally
       const encoreTag = this.getTag(EncoreTag) as EncoreTag;
       if (encoreTag) {
         const encoreMove = movePool.find(m => m.moveId === encoreTag.moveId);
@@ -6225,6 +6227,7 @@ export class EnemyPokemon extends Pokemon {
           return {
             move: encoreMove.moveId,
             targets: this.getNextTargets(encoreMove.moveId),
+            useMode: MoveUseMode.NORMAL,
           };
         }
       }
@@ -6232,7 +6235,7 @@ export class EnemyPokemon extends Pokemon {
         // No enemy should spawn with this AI type in-game
         case AiType.RANDOM: {
           const moveId = movePool[globalScene.randBattleSeedInt(movePool.length)].moveId;
-          return { move: moveId, targets: this.getNextTargets(moveId) };
+          return { move: moveId, targets: this.getNextTargets(moveId), useMode: MoveUseMode.NORMAL };
         }
         case AiType.SMART_RANDOM:
         case AiType.SMART: {
@@ -6401,14 +6404,20 @@ export class EnemyPokemon extends Pokemon {
             r,
             sortedMovePool.map(m => m.getName()),
           );
-          return { move: sortedMovePool[r]!.moveId, targets: moveTargets[sortedMovePool[r]!.moveId] };
+          return {
+            move: sortedMovePool[r]!.moveId,
+            targets: moveTargets[sortedMovePool[r]!.moveId],
+            useMode: MoveUseMode.NORMAL,
+          };
         }
       }
     }
 
+    // No moves left means struggle
     return {
       move: MoveId.STRUGGLE,
       targets: this.getNextTargets(MoveId.STRUGGLE),
+      useMode: MoveUseMode.IGNORE_PP,
     };
   }
 
@@ -6754,10 +6763,9 @@ interface IllusionData {
 export interface TurnMove {
   move: MoveId;
   targets: BattlerIndex[];
+  useMode: MoveUseMode;
   result?: MoveResult;
-  virtual?: boolean;
   turn?: number;
-  ignorePP?: boolean;
 }
 
 export interface AttackMoveResult {
@@ -6776,6 +6784,12 @@ export interface AttackMoveResult {
 export class PokemonSummonData {
   /** [Atk, Def, SpAtk, SpDef, Spd, Acc, Eva] */
   public statStages: number[] = [0, 0, 0, 0, 0, 0, 0];
+  /**
+   * A queue of moves yet to be executed, used by charging, recharging and frenzy moves.
+   * So long as this array is nonempty, this Pokemon's corresponding `CommandPhase` will be skipped over entirely
+   * in favor of using the queued move.
+   * TODO: Clean up a lot of the code surrounding the move queue.
+   */
   public moveQueue: TurnMove[] = [];
   public tags: BattlerTag[] = [];
   public abilitySuppressed = false;
@@ -6895,7 +6909,6 @@ export class PokemonWaveData {
  * Resets at the start of a new turn, as well as on switch.
  */
 export class PokemonTurnData {
-  public flinched = false;
   public acted = false;
   /** How many times the current move should hit the target(s) */
   public hitCount = 0;
@@ -6917,8 +6930,9 @@ export class PokemonTurnData {
   public failedRunAway = false;
   public joinedRound = false;
   /**
+   * The amount of times this Pokemon has acted again and used a move in the current turn.
    * Used to make sure multi-hits occur properly when the user is
-   * forced to act again in the same turn
+   * forced to act again in the same turn, and **must be incremented** by any effects that grant extra actions.
    */
   public extraTurns = 0;
   /**

src/field/trainer.ts

@@ -1,7 +1,7 @@
 import { globalScene } from "#app/global-scene";
 import { pokemonPrevolutions } from "#app/data/balance/pokemon-evolutions";
 import type PokemonSpecies from "#app/data/pokemon-species";
-import { getPokemonSpecies } from "#app/data/pokemon-species";
+import { getPokemonSpecies } from "#app/utils/pokemon-utils";
 import type { TrainerConfig } from "#app/data/trainers/trainer-config";
 import type { TrainerPartyTemplate } from "#app/data/trainers/TrainerPartyTemplate";
 import { trainerConfigs } from "#app/data/trainers/trainer-config";

src/game-mode.ts

@@ -5,7 +5,7 @@ import type { Challenge } from "./data/challenge";
 import { allChallenges, applyChallenges, copyChallenge } from "./data/challenge";
 import { ChallengeType } from "#enums/challenge-type";
 import type PokemonSpecies from "./data/pokemon-species";
-import { allSpecies } from "./data/pokemon-species";
+import { allSpecies } from "#app/data/data-lists";
 import type { Arena } from "./field/arena";
 import Overrides from "#app/overrides";
 import { isNullOrUndefined, randSeedInt, randSeedItem } from "#app/utils/common";
@@ -90,13 +90,14 @@ export class GameMode implements GameModeConfig {
   }
 
   /**
+   * Helper function to get starting level for game mode.
    * @returns either:
-   * - override from overrides.ts
+   * - starting level override from overrides.ts
    * - 20 for Daily Runs
    * - 5 for all other modes
    */
   getStartingLevel(): number {
-    if (Overrides.STARTING_LEVEL_OVERRIDE) {
+    if (Overrides.STARTING_LEVEL_OVERRIDE > 0) {
       return Overrides.STARTING_LEVEL_OVERRIDE;
     }
     switch (this.modeId) {

src/loading-scene.ts

@@ -21,6 +21,8 @@ import { initVouchers } from "#app/system/voucher";
 import { BiomeId } from "#enums/biome-id";
 import { initMysteryEncounters } from "#app/data/mystery-encounters/mystery-encounters";
 import { timedEventManager } from "./global-event-manager";
+import { initModifierPools } from "./modifier/init-modifier-pools";
+import { initModifierTypes } from "./modifier/modifier-type";
 
 export class LoadingScene extends SceneBase {
   public static readonly KEY = "loading";
@@ -363,6 +365,9 @@ export class LoadingScene extends SceneBase {
 
     this.loadLoadingScreen();
 
+    initModifierTypes();
+    initModifierPools();
+
     initAchievements();
     initVouchers();
     initStatsKeys();

src/modifier/init-modifier-pools.ts

@@ -0,0 +1,854 @@
+import type Pokemon from "#app/field/pokemon";
+import {
+  dailyStarterModifierPool,
+  enemyBuffModifierPool,
+  modifierPool,
+  trainerModifierPool,
+  wildModifierPool,
+} from "#app/modifier/modifier-pools";
+import { globalScene } from "#app/global-scene";
+import { DoubleBattleChanceBoosterModifier, SpeciesCritBoosterModifier, TurnStatusEffectModifier } from "./modifier";
+import { WeightedModifierType } from "./modifier-type";
+import { ModifierTier } from "../enums/modifier-tier";
+import type { WeightedModifierTypeWeightFunc } from "#app/@types/modifier-types";
+import { modifierTypes } from "#app/data/data-lists";
+import { PokeballType } from "#enums/pokeball";
+import { BerryModifier } from "./modifier";
+import { BerryType } from "#enums/berry-type";
+import { SpeciesId } from "#enums/species-id";
+import { timedEventManager } from "#app/global-event-manager";
+import { pokemonEvolutions } from "#app/data/balance/pokemon-evolutions";
+import { Unlockables } from "#enums/unlockables";
+import { isNullOrUndefined } from "#app/utils/common";
+import { MoveId } from "#enums/move-id";
+import { StatusEffect } from "#enums/status-effect";
+import { AbilityId } from "#enums/ability-id";
+import { MAX_PER_TYPE_POKEBALLS } from "#app/data/pokeball";
+// biome-ignore lint/correctness/noUnusedImports: This is used in a tsdoc comment
+import type { initModifierTypes } from "./modifier-type";
+
+/**
+ * Initialize the wild modifier pool
+ */
+function initWildModifierPool() {
+  wildModifierPool[ModifierTier.COMMON] = [new WeightedModifierType(modifierTypes.BERRY, 1)].map(m => {
+    m.setTier(ModifierTier.COMMON);
+    return m;
+  });
+  wildModifierPool[ModifierTier.GREAT] = [new WeightedModifierType(modifierTypes.BASE_STAT_BOOSTER, 1)].map(m => {
+    m.setTier(ModifierTier.GREAT);
+    return m;
+  });
+  wildModifierPool[ModifierTier.ULTRA] = [
+    new WeightedModifierType(modifierTypes.ATTACK_TYPE_BOOSTER, 10),
+    new WeightedModifierType(modifierTypes.WHITE_HERB, 0),
+  ].map(m => {
+    m.setTier(ModifierTier.ULTRA);
+    return m;
+  });
+  wildModifierPool[ModifierTier.ROGUE] = [new WeightedModifierType(modifierTypes.LUCKY_EGG, 4)].map(m => {
+    m.setTier(ModifierTier.ROGUE);
+    return m;
+  });
+  wildModifierPool[ModifierTier.MASTER] = [new WeightedModifierType(modifierTypes.GOLDEN_EGG, 1)].map(m => {
+    m.setTier(ModifierTier.MASTER);
+    return m;
+  });
+}
+
+/**
+ * Initialize the common modifier pool
+ */
+function initCommonModifierPool() {
+  modifierPool[ModifierTier.COMMON] = [
+    new WeightedModifierType(modifierTypes.POKEBALL, () => (hasMaximumBalls(PokeballType.POKEBALL) ? 0 : 6), 6),
+    new WeightedModifierType(modifierTypes.RARE_CANDY, 2),
+    new WeightedModifierType(
+      modifierTypes.POTION,
+      (party: Pokemon[]) => {
+        const thresholdPartyMemberCount = Math.min(
+          party.filter(p => p.getInverseHp() >= 10 && p.getHpRatio() <= 0.875 && !p.isFainted()).length,
+          3,
+        );
+        return thresholdPartyMemberCount * 3;
+      },
+      9,
+    ),
+    new WeightedModifierType(
+      modifierTypes.SUPER_POTION,
+      (party: Pokemon[]) => {
+        const thresholdPartyMemberCount = Math.min(
+          party.filter(p => p.getInverseHp() >= 25 && p.getHpRatio() <= 0.75 && !p.isFainted()).length,
+          3,
+        );
+        return thresholdPartyMemberCount;
+      },
+      3,
+    ),
+    new WeightedModifierType(
+      modifierTypes.ETHER,
+      (party: Pokemon[]) => {
+        const thresholdPartyMemberCount = Math.min(
+          party.filter(
+            p =>
+              p.hp &&
+              !p.getHeldItems().some(m => m instanceof BerryModifier && m.berryType === BerryType.LEPPA) &&
+              p
+                .getMoveset()
+                .filter(m => m.ppUsed && m.getMovePp() - m.ppUsed <= 5 && m.ppUsed > Math.floor(m.getMovePp() / 2))
+                .length,
+          ).length,
+          3,
+        );
+        return thresholdPartyMemberCount * 3;
+      },
+      9,
+    ),
+    new WeightedModifierType(
+      modifierTypes.MAX_ETHER,
+      (party: Pokemon[]) => {
+        const thresholdPartyMemberCount = Math.min(
+          party.filter(
+            p =>
+              p.hp &&
+              !p.getHeldItems().some(m => m instanceof BerryModifier && m.berryType === BerryType.LEPPA) &&
+              p
+                .getMoveset()
+                .filter(m => m.ppUsed && m.getMovePp() - m.ppUsed <= 5 && m.ppUsed > Math.floor(m.getMovePp() / 2))
+                .length,
+          ).length,
+          3,
+        );
+        return thresholdPartyMemberCount;
+      },
+      3,
+    ),
+    new WeightedModifierType(modifierTypes.LURE, lureWeightFunc(10, 2)),
+    new WeightedModifierType(modifierTypes.TEMP_STAT_STAGE_BOOSTER, 4),
+    new WeightedModifierType(modifierTypes.BERRY, 2),
+    new WeightedModifierType(modifierTypes.TM_COMMON, 2),
+  ].map(m => {
+    m.setTier(ModifierTier.COMMON);
+    return m;
+  });
+}
+
+/**
+ * Initialize the Great modifier pool
+ */
+function initGreatModifierPool() {
+  modifierPool[ModifierTier.GREAT] = [
+    new WeightedModifierType(modifierTypes.GREAT_BALL, () => (hasMaximumBalls(PokeballType.GREAT_BALL) ? 0 : 6), 6),
+    new WeightedModifierType(modifierTypes.PP_UP, 2),
+    new WeightedModifierType(
+      modifierTypes.FULL_HEAL,
+      (party: Pokemon[]) => {
+        const statusEffectPartyMemberCount = Math.min(
+          party.filter(
+            p =>
+              p.hp &&
+              !!p.status &&
+              !p.getHeldItems().some(i => {
+                if (i instanceof TurnStatusEffectModifier) {
+                  return (i as TurnStatusEffectModifier).getStatusEffect() === p.status?.effect;
+                }
+                return false;
+              }),
+          ).length,
+          3,
+        );
+        return statusEffectPartyMemberCount * 6;
+      },
+      18,
+    ),
+    new WeightedModifierType(
+      modifierTypes.REVIVE,
+      (party: Pokemon[]) => {
+        const faintedPartyMemberCount = Math.min(party.filter(p => p.isFainted()).length, 3);
+        return faintedPartyMemberCount * 9;
+      },
+      27,
+    ),
+    new WeightedModifierType(
+      modifierTypes.MAX_REVIVE,
+      (party: Pokemon[]) => {
+        const faintedPartyMemberCount = Math.min(party.filter(p => p.isFainted()).length, 3);
+        return faintedPartyMemberCount * 3;
+      },
+      9,
+    ),
+    new WeightedModifierType(
+      modifierTypes.SACRED_ASH,
+      (party: Pokemon[]) => {
+        return party.filter(p => p.isFainted()).length >= Math.ceil(party.length / 2) ? 1 : 0;
+      },
+      1,
+    ),
+    new WeightedModifierType(
+      modifierTypes.HYPER_POTION,
+      (party: Pokemon[]) => {
+        const thresholdPartyMemberCount = Math.min(
+          party.filter(p => p.getInverseHp() >= 100 && p.getHpRatio() <= 0.625 && !p.isFainted()).length,
+          3,
+        );
+        return thresholdPartyMemberCount * 3;
+      },
+      9,
+    ),
+    new WeightedModifierType(
+      modifierTypes.MAX_POTION,
+      (party: Pokemon[]) => {
+        const thresholdPartyMemberCount = Math.min(
+          party.filter(p => p.getInverseHp() >= 100 && p.getHpRatio() <= 0.5 && !p.isFainted()).length,
+          3,
+        );
+        return thresholdPartyMemberCount;
+      },
+      3,
+    ),
+    new WeightedModifierType(
+      modifierTypes.FULL_RESTORE,
+      (party: Pokemon[]) => {
+        const statusEffectPartyMemberCount = Math.min(
+          party.filter(
+            p =>
+              p.hp &&
+              !!p.status &&
+              !p.getHeldItems().some(i => {
+                if (i instanceof TurnStatusEffectModifier) {
+                  return (i as TurnStatusEffectModifier).getStatusEffect() === p.status?.effect;
+                }
+                return false;
+              }),
+          ).length,
+          3,
+        );
+        const thresholdPartyMemberCount = Math.floor(
+          (Math.min(party.filter(p => p.getInverseHp() >= 100 && p.getHpRatio() <= 0.5 && !p.isFainted()).length, 3) +
+            statusEffectPartyMemberCount) /
+            2,
+        );
+        return thresholdPartyMemberCount;
+      },
+      3,
+    ),
+    new WeightedModifierType(
+      modifierTypes.ELIXIR,
+      (party: Pokemon[]) => {
+        const thresholdPartyMemberCount = Math.min(
+          party.filter(
+            p =>
+              p.hp &&
+              !p.getHeldItems().some(m => m instanceof BerryModifier && m.berryType === BerryType.LEPPA) &&
+              p
+                .getMoveset()
+                .filter(m => m.ppUsed && m.getMovePp() - m.ppUsed <= 5 && m.ppUsed > Math.floor(m.getMovePp() / 2))
+                .length,
+          ).length,
+          3,
+        );
+        return thresholdPartyMemberCount * 3;
+      },
+      9,
+    ),
+    new WeightedModifierType(
+      modifierTypes.MAX_ELIXIR,
+      (party: Pokemon[]) => {
+        const thresholdPartyMemberCount = Math.min(
+          party.filter(
+            p =>
+              p.hp &&
+              !p.getHeldItems().some(m => m instanceof BerryModifier && m.berryType === BerryType.LEPPA) &&
+              p
+                .getMoveset()
+                .filter(m => m.ppUsed && m.getMovePp() - m.ppUsed <= 5 && m.ppUsed > Math.floor(m.getMovePp() / 2))
+                .length,
+          ).length,
+          3,
+        );
+        return thresholdPartyMemberCount;
+      },
+      3,
+    ),
+    new WeightedModifierType(modifierTypes.DIRE_HIT, 4),
+    new WeightedModifierType(modifierTypes.SUPER_LURE, lureWeightFunc(15, 4)),
+    new WeightedModifierType(modifierTypes.NUGGET, skipInLastClassicWaveOrDefault(5)),
+    new WeightedModifierType(modifierTypes.SPECIES_STAT_BOOSTER, 4),
+    new WeightedModifierType(
+      modifierTypes.EVOLUTION_ITEM,
+      () => {
+        return Math.min(Math.ceil(globalScene.currentBattle.waveIndex / 15), 8);
+      },
+      8,
+    ),
+    new WeightedModifierType(
+      modifierTypes.MAP,
+      () => (globalScene.gameMode.isClassic && globalScene.currentBattle.waveIndex < 180 ? 2 : 0),
+      2,
+    ),
+    new WeightedModifierType(modifierTypes.SOOTHE_BELL, 2),
+    new WeightedModifierType(modifierTypes.TM_GREAT, 3),
+    new WeightedModifierType(
+      modifierTypes.MEMORY_MUSHROOM,
+      (party: Pokemon[]) => {
+        if (!party.find(p => p.getLearnableLevelMoves().length)) {
+          return 0;
+        }
+        const highestPartyLevel = party
+          .map(p => p.level)
+          .reduce((highestLevel: number, level: number) => Math.max(highestLevel, level), 1);
+        return Math.min(Math.ceil(highestPartyLevel / 20), 4);
+      },
+      4,
+    ),
+    new WeightedModifierType(modifierTypes.BASE_STAT_BOOSTER, 3),
+    new WeightedModifierType(modifierTypes.TERA_SHARD, (party: Pokemon[]) =>
+      party.filter(
+        p =>
+          !(p.hasSpecies(SpeciesId.TERAPAGOS) || p.hasSpecies(SpeciesId.OGERPON) || p.hasSpecies(SpeciesId.SHEDINJA)),
+      ).length > 0
+        ? 1
+        : 0,
+    ),
+    new WeightedModifierType(
+      modifierTypes.DNA_SPLICERS,
+      (party: Pokemon[]) => {
+        if (party.filter(p => !p.fusionSpecies).length > 1) {
+          if (globalScene.gameMode.isSplicedOnly) {
+            return 4;
+          }
+          if (globalScene.gameMode.isClassic && timedEventManager.areFusionsBoosted()) {
+            return 2;
+          }
+        }
+        return 0;
+      },
+      4,
+    ),
+    new WeightedModifierType(
+      modifierTypes.VOUCHER,
+      (_party: Pokemon[], rerollCount: number) => (!globalScene.gameMode.isDaily ? Math.max(1 - rerollCount, 0) : 0),
+      1,
+    ),
+  ].map(m => {
+    m.setTier(ModifierTier.GREAT);
+    return m;
+  });
+}
+
+/**
+ * Initialize the Ultra modifier pool
+ */
+function initUltraModifierPool() {
+  modifierPool[ModifierTier.ULTRA] = [
+    new WeightedModifierType(modifierTypes.ULTRA_BALL, () => (hasMaximumBalls(PokeballType.ULTRA_BALL) ? 0 : 15), 15),
+    new WeightedModifierType(modifierTypes.MAX_LURE, lureWeightFunc(30, 4)),
+    new WeightedModifierType(modifierTypes.BIG_NUGGET, skipInLastClassicWaveOrDefault(12)),
+    new WeightedModifierType(modifierTypes.PP_MAX, 3),
+    new WeightedModifierType(modifierTypes.MINT, 4),
+    new WeightedModifierType(
+      modifierTypes.RARE_EVOLUTION_ITEM,
+      () => Math.min(Math.ceil(globalScene.currentBattle.waveIndex / 15) * 4, 32),
+      32,
+    ),
+    new WeightedModifierType(
+      modifierTypes.FORM_CHANGE_ITEM,
+      () => Math.min(Math.ceil(globalScene.currentBattle.waveIndex / 50), 4) * 6,
+      24,
+    ),
+    new WeightedModifierType(modifierTypes.AMULET_COIN, skipInLastClassicWaveOrDefault(3)),
+    new WeightedModifierType(modifierTypes.EVIOLITE, (party: Pokemon[]) => {
+      const { gameMode, gameData } = globalScene;
+      if (gameMode.isDaily || (!gameMode.isFreshStartChallenge() && gameData.isUnlocked(Unlockables.EVIOLITE))) {
+        return party.some(p => {
+          // Check if Pokemon's species (or fusion species, if applicable) can evolve or if they're G-Max'd
+          if (
+            !p.isMax() &&
+            (p.getSpeciesForm(true).speciesId in pokemonEvolutions ||
+              (p.isFusion() && p.getFusionSpeciesForm(true).speciesId in pokemonEvolutions))
+          ) {
+            // Check if Pokemon is already holding an Eviolite
+            return !p.getHeldItems().some(i => i.type.id === "EVIOLITE");
+          }
+          return false;
+        })
+          ? 10
+          : 0;
+      }
+      return 0;
+    }),
+    new WeightedModifierType(modifierTypes.RARE_SPECIES_STAT_BOOSTER, 12),
+    new WeightedModifierType(
+      modifierTypes.LEEK,
+      (party: Pokemon[]) => {
+        const checkedSpecies = [SpeciesId.FARFETCHD, SpeciesId.GALAR_FARFETCHD, SpeciesId.SIRFETCHD];
+        // If a party member doesn't already have a Leek and is one of the relevant species, Leek can appear
+        return party.some(
+          p =>
+            !p.getHeldItems().some(i => i instanceof SpeciesCritBoosterModifier) &&
+            (checkedSpecies.includes(p.getSpeciesForm(true).speciesId) ||
+              (p.isFusion() && checkedSpecies.includes(p.getFusionSpeciesForm(true).speciesId))),
+        )
+          ? 12
+          : 0;
+      },
+      12,
+    ),
+    new WeightedModifierType(
+      modifierTypes.TOXIC_ORB,
+      (party: Pokemon[]) => {
+        return party.some(p => {
+          const isHoldingOrb = p.getHeldItems().some(i => i.type.id === "FLAME_ORB" || i.type.id === "TOXIC_ORB");
+
+          if (!isHoldingOrb) {
+            const moveset = p
+              .getMoveset(true)
+              .filter(m => !isNullOrUndefined(m))
+              .map(m => m.moveId);
+            const canSetStatus = p.canSetStatus(StatusEffect.TOXIC, true, true, null, true);
+
+            // Moves that take advantage of obtaining the actual status effect
+            const hasStatusMoves = [MoveId.FACADE, MoveId.PSYCHO_SHIFT].some(m => moveset.includes(m));
+            // Moves that take advantage of being able to give the target a status orb
+            // TODO: Take moves (Trick, Fling, Switcheroo) from comment when they are implemented
+            const hasItemMoves = [
+              /* MoveId.TRICK, MoveId.FLING, MoveId.SWITCHEROO */
+            ].some(m => moveset.includes(m));
+
+            if (canSetStatus) {
+              // Abilities that take advantage of obtaining the actual status effect, separated based on specificity to the orb
+              const hasGeneralAbility = [
+                AbilityId.QUICK_FEET,
+                AbilityId.GUTS,
+                AbilityId.MARVEL_SCALE,
+                AbilityId.MAGIC_GUARD,
+              ].some(a => p.hasAbility(a, false, true));
+              const hasSpecificAbility = [AbilityId.TOXIC_BOOST, AbilityId.POISON_HEAL].some(a =>
+                p.hasAbility(a, false, true),
+              );
+              const hasOppositeAbility = [AbilityId.FLARE_BOOST].some(a => p.hasAbility(a, false, true));
+
+              return hasSpecificAbility || (hasGeneralAbility && !hasOppositeAbility) || hasStatusMoves;
+            }
+            return hasItemMoves;
+          }
+
+          return false;
+        })
+          ? 10
+          : 0;
+      },
+      10,
+    ),
+    new WeightedModifierType(
+      modifierTypes.FLAME_ORB,
+      (party: Pokemon[]) => {
+        return party.some(p => {
+          const isHoldingOrb = p.getHeldItems().some(i => i.type.id === "FLAME_ORB" || i.type.id === "TOXIC_ORB");
+
+          if (!isHoldingOrb) {
+            const moveset = p
+              .getMoveset(true)
+              .filter(m => !isNullOrUndefined(m))
+              .map(m => m.moveId);
+            const canSetStatus = p.canSetStatus(StatusEffect.BURN, true, true, null, true);
+
+            // Moves that take advantage of obtaining the actual status effect
+            const hasStatusMoves = [MoveId.FACADE, MoveId.PSYCHO_SHIFT].some(m => moveset.includes(m));
+            // Moves that take advantage of being able to give the target a status orb
+            // TODO: Take moves (Trick, Fling, Switcheroo) from comment when they are implemented
+            const hasItemMoves = [
+              /* MoveId.TRICK, MoveId.FLING, MoveId.SWITCHEROO */
+            ].some(m => moveset.includes(m));
+
+            if (canSetStatus) {
+              // Abilities that take advantage of obtaining the actual status effect, separated based on specificity to the orb
+              const hasGeneralAbility = [
+                AbilityId.QUICK_FEET,
+                AbilityId.GUTS,
+                AbilityId.MARVEL_SCALE,
+                AbilityId.MAGIC_GUARD,
+              ].some(a => p.hasAbility(a, false, true));
+              const hasSpecificAbility = [AbilityId.FLARE_BOOST].some(a => p.hasAbility(a, false, true));
+              const hasOppositeAbility = [AbilityId.TOXIC_BOOST, AbilityId.POISON_HEAL].some(a =>
+                p.hasAbility(a, false, true),
+              );
+
+              return hasSpecificAbility || (hasGeneralAbility && !hasOppositeAbility) || hasStatusMoves;
+            }
+            return hasItemMoves;
+          }
+
+          return false;
+        })
+          ? 10
+          : 0;
+      },
+      10,
+    ),
+    new WeightedModifierType(
+      modifierTypes.MYSTICAL_ROCK,
+      (party: Pokemon[]) => {
+        return party.some(p => {
+          let isHoldingMax = false;
+          for (const i of p.getHeldItems()) {
+            if (i.type.id === "MYSTICAL_ROCK") {
+              isHoldingMax = i.getStackCount() === i.getMaxStackCount();
+              break;
+            }
+          }
+
+          if (!isHoldingMax) {
+            const moveset = p.getMoveset(true).map(m => m.moveId);
+
+            const hasAbility = [
+              AbilityId.DROUGHT,
+              AbilityId.ORICHALCUM_PULSE,
+              AbilityId.DRIZZLE,
+              AbilityId.SAND_STREAM,
+              AbilityId.SAND_SPIT,
+              AbilityId.SNOW_WARNING,
+              AbilityId.ELECTRIC_SURGE,
+              AbilityId.HADRON_ENGINE,
+              AbilityId.PSYCHIC_SURGE,
+              AbilityId.GRASSY_SURGE,
+              AbilityId.SEED_SOWER,
+              AbilityId.MISTY_SURGE,
+            ].some(a => p.hasAbility(a, false, true));
+
+            const hasMoves = [
+              MoveId.SUNNY_DAY,
+              MoveId.RAIN_DANCE,
+              MoveId.SANDSTORM,
+              MoveId.SNOWSCAPE,
+              MoveId.HAIL,
+              MoveId.CHILLY_RECEPTION,
+              MoveId.ELECTRIC_TERRAIN,
+              MoveId.PSYCHIC_TERRAIN,
+              MoveId.GRASSY_TERRAIN,
+              MoveId.MISTY_TERRAIN,
+            ].some(m => moveset.includes(m));
+
+            return hasAbility || hasMoves;
+          }
+          return false;
+        })
+          ? 10
+          : 0;
+      },
+      10,
+    ),
+    new WeightedModifierType(modifierTypes.REVIVER_SEED, 4),
+    new WeightedModifierType(modifierTypes.CANDY_JAR, skipInLastClassicWaveOrDefault(5)),
+    new WeightedModifierType(modifierTypes.ATTACK_TYPE_BOOSTER, 9),
+    new WeightedModifierType(modifierTypes.TM_ULTRA, 11),
+    new WeightedModifierType(modifierTypes.RARER_CANDY, 4),
+    new WeightedModifierType(modifierTypes.GOLDEN_PUNCH, skipInLastClassicWaveOrDefault(2)),
+    new WeightedModifierType(modifierTypes.IV_SCANNER, skipInLastClassicWaveOrDefault(4)),
+    new WeightedModifierType(modifierTypes.EXP_CHARM, skipInLastClassicWaveOrDefault(8)),
+    new WeightedModifierType(modifierTypes.EXP_SHARE, skipInLastClassicWaveOrDefault(10)),
+    new WeightedModifierType(
+      modifierTypes.TERA_ORB,
+      () =>
+        !globalScene.gameMode.isClassic
+          ? Math.min(Math.max(Math.floor(globalScene.currentBattle.waveIndex / 50) * 2, 1), 4)
+          : 0,
+      4,
+    ),
+    new WeightedModifierType(modifierTypes.QUICK_CLAW, 3),
+    new WeightedModifierType(modifierTypes.WIDE_LENS, 7),
+  ].map(m => {
+    m.setTier(ModifierTier.ULTRA);
+    return m;
+  });
+}
+
+function initRogueModifierPool() {
+  modifierPool[ModifierTier.ROGUE] = [
+    new WeightedModifierType(modifierTypes.ROGUE_BALL, () => (hasMaximumBalls(PokeballType.ROGUE_BALL) ? 0 : 16), 16),
+    new WeightedModifierType(modifierTypes.RELIC_GOLD, skipInLastClassicWaveOrDefault(2)),
+    new WeightedModifierType(modifierTypes.LEFTOVERS, 3),
+    new WeightedModifierType(modifierTypes.SHELL_BELL, 3),
+    new WeightedModifierType(modifierTypes.BERRY_POUCH, 4),
+    new WeightedModifierType(modifierTypes.GRIP_CLAW, 5),
+    new WeightedModifierType(modifierTypes.SCOPE_LENS, 4),
+    new WeightedModifierType(modifierTypes.BATON, 2),
+    new WeightedModifierType(modifierTypes.SOUL_DEW, 7),
+    new WeightedModifierType(modifierTypes.CATCHING_CHARM, () => (!globalScene.gameMode.isClassic ? 4 : 0), 4),
+    new WeightedModifierType(modifierTypes.ABILITY_CHARM, skipInClassicAfterWave(189, 6)),
+    new WeightedModifierType(modifierTypes.FOCUS_BAND, 5),
+    new WeightedModifierType(modifierTypes.KINGS_ROCK, 3),
+    new WeightedModifierType(modifierTypes.LOCK_CAPSULE, () => (globalScene.gameMode.isClassic ? 0 : 3)),
+    new WeightedModifierType(modifierTypes.SUPER_EXP_CHARM, skipInLastClassicWaveOrDefault(8)),
+    new WeightedModifierType(
+      modifierTypes.RARE_FORM_CHANGE_ITEM,
+      () => Math.min(Math.ceil(globalScene.currentBattle.waveIndex / 50), 4) * 6,
+      24,
+    ),
+    new WeightedModifierType(
+      modifierTypes.MEGA_BRACELET,
+      () => Math.min(Math.ceil(globalScene.currentBattle.waveIndex / 50), 4) * 9,
+      36,
+    ),
+    new WeightedModifierType(
+      modifierTypes.DYNAMAX_BAND,
+      () => Math.min(Math.ceil(globalScene.currentBattle.waveIndex / 50), 4) * 9,
+      36,
+    ),
+    new WeightedModifierType(
+      modifierTypes.VOUCHER_PLUS,
+      (_party: Pokemon[], rerollCount: number) =>
+        !globalScene.gameMode.isDaily ? Math.max(3 - rerollCount * 1, 0) : 0,
+      3,
+    ),
+  ].map(m => {
+    m.setTier(ModifierTier.ROGUE);
+    return m;
+  });
+}
+
+/**
+ * Initialize the Master modifier pool
+ */
+function initMasterModifierPool() {
+  modifierPool[ModifierTier.MASTER] = [
+    new WeightedModifierType(modifierTypes.MASTER_BALL, () => (hasMaximumBalls(PokeballType.MASTER_BALL) ? 0 : 24), 24),
+    new WeightedModifierType(modifierTypes.SHINY_CHARM, 14),
+    new WeightedModifierType(modifierTypes.HEALING_CHARM, 18),
+    new WeightedModifierType(modifierTypes.MULTI_LENS, 18),
+    new WeightedModifierType(
+      modifierTypes.VOUCHER_PREMIUM,
+      (_party: Pokemon[], rerollCount: number) =>
+        !globalScene.gameMode.isDaily && !globalScene.gameMode.isEndless && !globalScene.gameMode.isSplicedOnly
+          ? Math.max(5 - rerollCount * 2, 0)
+          : 0,
+      5,
+    ),
+    new WeightedModifierType(
+      modifierTypes.DNA_SPLICERS,
+      (party: Pokemon[]) =>
+        !(globalScene.gameMode.isClassic && timedEventManager.areFusionsBoosted()) &&
+        !globalScene.gameMode.isSplicedOnly &&
+        party.filter(p => !p.fusionSpecies).length > 1
+          ? 24
+          : 0,
+      24,
+    ),
+    new WeightedModifierType(
+      modifierTypes.MINI_BLACK_HOLE,
+      () =>
+        globalScene.gameMode.isDaily ||
+        (!globalScene.gameMode.isFreshStartChallenge() && globalScene.gameData.isUnlocked(Unlockables.MINI_BLACK_HOLE))
+          ? 1
+          : 0,
+      1,
+    ),
+  ].map(m => {
+    m.setTier(ModifierTier.MASTER);
+    return m;
+  });
+}
+
+function initTrainerModifierPool() {
+  trainerModifierPool[ModifierTier.COMMON] = [
+    new WeightedModifierType(modifierTypes.BERRY, 8),
+    new WeightedModifierType(modifierTypes.BASE_STAT_BOOSTER, 3),
+  ].map(m => {
+    m.setTier(ModifierTier.COMMON);
+    return m;
+  });
+  trainerModifierPool[ModifierTier.GREAT] = [new WeightedModifierType(modifierTypes.BASE_STAT_BOOSTER, 3)].map(m => {
+    m.setTier(ModifierTier.GREAT);
+    return m;
+  });
+  trainerModifierPool[ModifierTier.ULTRA] = [
+    new WeightedModifierType(modifierTypes.ATTACK_TYPE_BOOSTER, 10),
+    new WeightedModifierType(modifierTypes.WHITE_HERB, 0),
+  ].map(m => {
+    m.setTier(ModifierTier.ULTRA);
+    return m;
+  });
+  trainerModifierPool[ModifierTier.ROGUE] = [
+    new WeightedModifierType(modifierTypes.FOCUS_BAND, 2),
+    new WeightedModifierType(modifierTypes.LUCKY_EGG, 4),
+    new WeightedModifierType(modifierTypes.QUICK_CLAW, 1),
+    new WeightedModifierType(modifierTypes.GRIP_CLAW, 1),
+    new WeightedModifierType(modifierTypes.WIDE_LENS, 1),
+  ].map(m => {
+    m.setTier(ModifierTier.ROGUE);
+    return m;
+  });
+  trainerModifierPool[ModifierTier.MASTER] = [
+    new WeightedModifierType(modifierTypes.KINGS_ROCK, 1),
+    new WeightedModifierType(modifierTypes.LEFTOVERS, 1),
+    new WeightedModifierType(modifierTypes.SHELL_BELL, 1),
+    new WeightedModifierType(modifierTypes.SCOPE_LENS, 1),
+  ].map(m => {
+    m.setTier(ModifierTier.MASTER);
+    return m;
+  });
+}
+
+/**
+ * Initialize the enemy buff modifier pool
+ */
+function initEnemyBuffModifierPool() {
+  enemyBuffModifierPool[ModifierTier.COMMON] = [
+    new WeightedModifierType(modifierTypes.ENEMY_DAMAGE_BOOSTER, 9),
+    new WeightedModifierType(modifierTypes.ENEMY_DAMAGE_REDUCTION, 9),
+    new WeightedModifierType(modifierTypes.ENEMY_ATTACK_POISON_CHANCE, 3),
+    new WeightedModifierType(modifierTypes.ENEMY_ATTACK_PARALYZE_CHANCE, 3),
+    new WeightedModifierType(modifierTypes.ENEMY_ATTACK_BURN_CHANCE, 3),
+    new WeightedModifierType(modifierTypes.ENEMY_STATUS_EFFECT_HEAL_CHANCE, 9),
+    new WeightedModifierType(modifierTypes.ENEMY_ENDURE_CHANCE, 4),
+    new WeightedModifierType(modifierTypes.ENEMY_FUSED_CHANCE, 1),
+  ].map(m => {
+    m.setTier(ModifierTier.COMMON);
+    return m;
+  });
+  enemyBuffModifierPool[ModifierTier.GREAT] = [
+    new WeightedModifierType(modifierTypes.ENEMY_DAMAGE_BOOSTER, 5),
+    new WeightedModifierType(modifierTypes.ENEMY_DAMAGE_REDUCTION, 5),
+    new WeightedModifierType(modifierTypes.ENEMY_STATUS_EFFECT_HEAL_CHANCE, 5),
+    new WeightedModifierType(modifierTypes.ENEMY_ENDURE_CHANCE, 5),
+    new WeightedModifierType(modifierTypes.ENEMY_FUSED_CHANCE, 1),
+  ].map(m => {
+    m.setTier(ModifierTier.GREAT);
+    return m;
+  });
+  enemyBuffModifierPool[ModifierTier.ULTRA] = [
+    new WeightedModifierType(modifierTypes.ENEMY_DAMAGE_BOOSTER, 10),
+    new WeightedModifierType(modifierTypes.ENEMY_DAMAGE_REDUCTION, 10),
+    new WeightedModifierType(modifierTypes.ENEMY_HEAL, 10),
+    new WeightedModifierType(modifierTypes.ENEMY_STATUS_EFFECT_HEAL_CHANCE, 10),
+    new WeightedModifierType(modifierTypes.ENEMY_ENDURE_CHANCE, 10),
+    new WeightedModifierType(modifierTypes.ENEMY_FUSED_CHANCE, 5),
+  ].map(m => {
+    m.setTier(ModifierTier.ULTRA);
+    return m;
+  });
+  enemyBuffModifierPool[ModifierTier.ROGUE] = [].map((m: WeightedModifierType) => {
+    m.setTier(ModifierTier.ROGUE);
+    return m;
+  });
+  enemyBuffModifierPool[ModifierTier.MASTER] = [].map((m: WeightedModifierType) => {
+    m.setTier(ModifierTier.MASTER);
+    return m;
+  });
+}
+
+/**
+ * Initialize the daily starter modifier pool
+ */
+function initDailyStarterModifierPool() {
+  dailyStarterModifierPool[ModifierTier.COMMON] = [
+    new WeightedModifierType(modifierTypes.BASE_STAT_BOOSTER, 1),
+    new WeightedModifierType(modifierTypes.BERRY, 3),
+  ].map(m => {
+    m.setTier(ModifierTier.COMMON);
+    return m;
+  });
+  dailyStarterModifierPool[ModifierTier.GREAT] = [new WeightedModifierType(modifierTypes.ATTACK_TYPE_BOOSTER, 5)].map(
+    m => {
+      m.setTier(ModifierTier.GREAT);
+      return m;
+    },
+  );
+  dailyStarterModifierPool[ModifierTier.ULTRA] = [
+    new WeightedModifierType(modifierTypes.REVIVER_SEED, 4),
+    new WeightedModifierType(modifierTypes.SOOTHE_BELL, 1),
+    new WeightedModifierType(modifierTypes.SOUL_DEW, 1),
+    new WeightedModifierType(modifierTypes.GOLDEN_PUNCH, 1),
+  ].map(m => {
+    m.setTier(ModifierTier.ULTRA);
+    return m;
+  });
+  dailyStarterModifierPool[ModifierTier.ROGUE] = [
+    new WeightedModifierType(modifierTypes.GRIP_CLAW, 5),
+    new WeightedModifierType(modifierTypes.BATON, 2),
+    new WeightedModifierType(modifierTypes.FOCUS_BAND, 5),
+    new WeightedModifierType(modifierTypes.QUICK_CLAW, 3),
+    new WeightedModifierType(modifierTypes.KINGS_ROCK, 3),
+  ].map(m => {
+    m.setTier(ModifierTier.ROGUE);
+    return m;
+  });
+  dailyStarterModifierPool[ModifierTier.MASTER] = [
+    new WeightedModifierType(modifierTypes.LEFTOVERS, 1),
+    new WeightedModifierType(modifierTypes.SHELL_BELL, 1),
+  ].map(m => {
+    m.setTier(ModifierTier.MASTER);
+    return m;
+  });
+}
+
+/**
+ * Initialize {@linkcode modifierPool} with the initial set of modifier types.
+ * {@linkcode initModifierTypes} MUST be called before this function.
+ */
+export function initModifierPools() {
+  // The modifier pools the player chooses from during modifier selection
+  initCommonModifierPool();
+  initGreatModifierPool();
+  initUltraModifierPool();
+  initRogueModifierPool();
+  initMasterModifierPool();
+
+  // Modifier pools for specific scenarios
+  initWildModifierPool();
+  initTrainerModifierPool();
+  initEnemyBuffModifierPool();
+  initDailyStarterModifierPool();
+}
+
+/**
+ * High order function that returns a WeightedModifierTypeWeightFunc that will only be applied on
+ * classic and skip an ModifierType if current wave is greater or equal to the one passed down
+ * @param wave - Wave where we should stop showing the modifier
+ * @param defaultWeight - ModifierType default weight
+ * @returns A WeightedModifierTypeWeightFunc
+ */
+function skipInClassicAfterWave(wave: number, defaultWeight: number): WeightedModifierTypeWeightFunc {
+  return () => {
+    const gameMode = globalScene.gameMode;
+    const currentWave = globalScene.currentBattle.waveIndex;
+    return gameMode.isClassic && currentWave >= wave ? 0 : defaultWeight;
+  };
+}
+
+/**
+ * High order function that returns a WeightedModifierTypeWeightFunc that will only be applied on
+ * classic and it will skip a ModifierType if it is the last wave pull.
+ * @param defaultWeight ModifierType default weight
+ * @returns A WeightedModifierTypeWeightFunc
+ */
+function skipInLastClassicWaveOrDefault(defaultWeight: number): WeightedModifierTypeWeightFunc {
+  return skipInClassicAfterWave(199, defaultWeight);
+}
+
+/**
+ * High order function that returns a WeightedModifierTypeWeightFunc to ensure Lures don't spawn on Classic 199
+ * or if the lure still has over 60% of its duration left
+ * @param maxBattles The max battles the lure type in question lasts. 10 for green, 15 for Super, 30 for Max
+ * @param weight The desired weight for the lure when it does spawn
+ * @returns A WeightedModifierTypeWeightFunc
+ */
+function lureWeightFunc(maxBattles: number, weight: number): WeightedModifierTypeWeightFunc {
+  return () => {
+    const lures = globalScene.getModifiers(DoubleBattleChanceBoosterModifier);
+    return !(globalScene.gameMode.isClassic && globalScene.currentBattle.waveIndex === 199) &&
+      (lures.length === 0 ||
+        lures.filter(m => m.getMaxBattles() === maxBattles && m.getBattleCount() >= maxBattles * 0.6).length === 0)
+      ? weight
+      : 0;
+  };
+}
+
+/**
+ * Used to check if the player has max of a given ball type in Classic
+ * @param ballType The {@linkcode PokeballType} being checked
+ * @returns boolean: true if the player has the maximum of a given ball type
+ */
+function hasMaximumBalls(ballType: PokeballType): boolean {
+  return globalScene.gameMode.isClassic && globalScene.pokeballCounts[ballType] >= MAX_PER_TYPE_POKEBALLS;
+}

src/modifier/modifier-pools.ts

@@ -0,0 +1,16 @@
+/**
+ * Contains modifier pools for different contexts in the game.
+ * Can be safely imported without worrying about circular dependencies.
+ */
+
+import type { ModifierPool } from "#app/@types/modifier-types";
+
+export const modifierPool: ModifierPool = {};
+
+export const wildModifierPool: ModifierPool = {};
+
+export const trainerModifierPool: ModifierPool = {};
+
+export const enemyBuffModifierPool: ModifierPool = {};
+
+export const dailyStarterModifierPool: ModifierPool = {};

src/modifier/modifier.ts

@@ -1,12 +1,13 @@
 import { FusionSpeciesFormEvolution, pokemonEvolutions } from "#app/data/balance/pokemon-evolutions";
 import { getBerryEffectFunc, getBerryPredicate } from "#app/data/berry";
 import { getLevelTotalExp } from "#app/data/exp";
-import { allMoves } from "#app/data/data-lists";
+import { allMoves, modifierTypes } from "#app/data/data-lists";
 import { MAX_PER_TYPE_POKEBALLS } from "#app/data/pokeball";
 import { SpeciesFormChangeItemTrigger } from "#app/data/pokemon-forms/form-change-triggers";
 import type { FormChangeItem } from "#enums/form-change-item";
 import { getStatusEffectHealText } from "#app/data/status-effect";
-import Pokemon, { type PlayerPokemon } from "#app/field/pokemon";
+import type { PlayerPokemon } from "#app/field/pokemon";
+import type Pokemon from "#app/field/pokemon";
 import { getPokemonNameWithAffix } from "#app/messages";
 import Overrides from "#app/overrides";
 import { LearnMoveType } from "#enums/learn-move-type";
@@ -24,33 +25,26 @@ import { type PermanentStat, type TempBattleStat, BATTLE_STATS, Stat, TEMP_BATTL
 import { StatusEffect } from "#enums/status-effect";
 import type { PokemonType } from "#enums/pokemon-type";
 import i18next from "i18next";
-import {
-  type DoubleBattleChanceBoosterModifierType,
-  type EvolutionItemModifierType,
-  type FormChangeItemModifierType,
-  type ModifierOverride,
-  type ModifierType,
-  type PokemonBaseStatTotalModifierType,
-  type PokemonExpBoosterModifierType,
-  type PokemonFriendshipBoosterModifierType,
-  type PokemonMoveAccuracyBoosterModifierType,
-  type PokemonMultiHitModifierType,
-  type TerastallizeModifierType,
-  type TmModifierType,
-  getModifierType,
-  ModifierTypeGenerator,
-  modifierTypes,
-  PokemonHeldItemModifierType,
+import type {
+  DoubleBattleChanceBoosterModifierType,
+  EvolutionItemModifierType,
+  FormChangeItemModifierType,
+  ModifierOverride,
+  ModifierType,
+  PokemonBaseStatTotalModifierType,
+  PokemonExpBoosterModifierType,
+  PokemonFriendshipBoosterModifierType,
+  PokemonMoveAccuracyBoosterModifierType,
+  PokemonMultiHitModifierType,
+  TerastallizeModifierType,
+  TmModifierType,
 } from "./modifier-type";
+import { getModifierType } from "#app/utils/modifier-utils";
 import { Color, ShadowColor } from "#enums/color";
 import { FRIENDSHIP_GAIN_FROM_RARE_CANDY } from "#app/data/balance/starters";
-import {
-  applyAbAttrs,
-  applyPostItemLostAbAttrs,
-  CommanderAbAttr,
-  PostItemLostAbAttr,
-} from "#app/data/abilities/ability";
+import { applyAbAttrs, applyPostItemLostAbAttrs } from "#app/data/abilities/apply-ab-attrs";
 import { globalScene } from "#app/global-scene";
+import type { ModifierInstanceMap, ModifierString } from "#app/@types/modifier-types";
 
 export type ModifierPredicate = (modifier: Modifier) => boolean;
 
@@ -164,6 +158,23 @@ export abstract class Modifier {
     this.type = type;
   }
 
+  /**
+   * Return whether this modifier is of the given class
+   *
+   * @remarks
+   * Used to avoid requiring the caller to have imported the specific modifier class, avoiding circular dependencies.
+   *
+   * @param modifier - The modifier to check against
+   * @returns Whether the modiifer is an instance of the given type
+   */
+  public is<T extends ModifierString>(modifier: T): this is ModifierInstanceMap[T] {
+    const targetModifier = ModifierClassMap[modifier];
+    if (!targetModifier) {
+      return false;
+    }
+    return this instanceof targetModifier;
+  }
+
   match(_modifier: Modifier): boolean {
     return false;
   }
@@ -188,6 +199,11 @@ export abstract class PersistentModifier extends Modifier {
   public stackCount: number;
   public virtualStackCount: number;
 
+  /** This field does not exist at runtime and must not be used.
+   * Its sole purpose is to ensure that typescript is able to properly narrow when the `is` method is called.
+   */
+  private declare _: never;
+
   constructor(type: ModifierType, stackCount = 1) {
     super(type);
     this.stackCount = stackCount;
@@ -756,6 +772,10 @@ export abstract class PokemonHeldItemModifier extends PersistentModifier {
     return this.getMaxHeldItemCount(pokemon);
   }
 
+  getSpecies(): SpeciesId | null {
+    return null;
+  }
+
   abstract getMaxHeldItemCount(pokemon?: Pokemon): number;
 }
 
@@ -902,27 +922,14 @@ export class EvoTrackerModifier extends PokemonHeldItemModifier {
     return true;
   }
 
-  getIconStackText(virtual?: boolean): Phaser.GameObjects.BitmapText | null {
-    if (this.getMaxStackCount() === 1 || (virtual && !this.virtualStackCount)) {
-      return null;
-    }
+  getIconStackText(_virtual?: boolean): Phaser.GameObjects.BitmapText | null {
+    const pokemon = this.getPokemon();
 
-    const pokemon = globalScene.getPokemonById(this.pokemonId);
+    const count = (pokemon?.getPersistentTreasureCount() || 0) + this.getStackCount();
 
-    this.stackCount = pokemon
-      ? pokemon.evoCounter +
-        pokemon.getHeldItems().filter(m => m instanceof DamageMoneyRewardModifier).length +
-        globalScene.findModifiers(
-          m =>
-            m instanceof MoneyMultiplierModifier ||
-            m instanceof ExtraModifierModifier ||
-            m instanceof TempExtraModifierModifier,
-        ).length
-      : this.stackCount;
-
-    const text = globalScene.add.bitmapText(10, 15, "item-count", this.stackCount.toString(), 11);
+    const text = globalScene.add.bitmapText(10, 15, "item-count", count.toString(), 11);
     text.letterSpacing = -0.5;
-    if (this.getStackCount() >= this.required) {
+    if (count >= this.required) {
       text.setTint(0xf89890);
     }
     text.setOrigin(0, 0);
@@ -930,18 +937,13 @@ export class EvoTrackerModifier extends PokemonHeldItemModifier {
     return text;
   }
 
-  getMaxHeldItemCount(pokemon: Pokemon): number {
-    this.stackCount =
-      pokemon.evoCounter +
-      pokemon.getHeldItems().filter(m => m instanceof DamageMoneyRewardModifier).length +
-      globalScene.findModifiers(
-        m =>
-          m instanceof MoneyMultiplierModifier ||
-          m instanceof ExtraModifierModifier ||
-          m instanceof TempExtraModifierModifier,
-      ).length;
+  getMaxHeldItemCount(_pokemon: Pokemon): number {
     return 999;
   }
+
+  override getSpecies(): SpeciesId {
+    return this.species;
+  }
 }
 
 /**
@@ -1593,7 +1595,7 @@ export class BypassSpeedChanceModifier extends PokemonHeldItemModifier {
       doBypassSpeed.value = true;
       const isCommandFight =
         globalScene.currentBattle.turnCommands[pokemon.getBattlerIndex()]?.command === Command.FIGHT;
-      const hasQuickClaw = this.type instanceof PokemonHeldItemModifierType && this.type.id === "QUICK_CLAW";
+      const hasQuickClaw = this.type.is("PokemonHeldItemModifierType") && this.type.id === "QUICK_CLAW";
 
       if (isCommandFight && hasQuickClaw) {
         globalScene.phaseManager.queueMessage(
@@ -1877,7 +1879,7 @@ export class BerryModifier extends PokemonHeldItemModifier {
 
     // munch the berry and trigger unburden-like effects
     getBerryEffectFunc(this.berryType)(pokemon);
-    applyPostItemLostAbAttrs(PostItemLostAbAttr, pokemon, false);
+    applyPostItemLostAbAttrs("PostItemLostAbAttr", pokemon, false);
 
     // Update berry eaten trackers for Belch, Harvest, Cud Chew, etc.
     // Don't recover it if we proc berry pouch (no item duplication)
@@ -1965,7 +1967,7 @@ export class PokemonInstantReviveModifier extends PokemonHeldItemModifier {
     // Reapply Commander on the Pokemon's side of the field, if applicable
     const field = pokemon.isPlayer() ? globalScene.getPlayerField() : globalScene.getEnemyField();
     for (const p of field) {
-      applyAbAttrs(CommanderAbAttr, p, null, false);
+      applyAbAttrs("CommanderAbAttr", p, null, false);
     }
     return true;
   }
@@ -2386,19 +2388,13 @@ export class EvolutionItemModifier extends ConsumablePokemonModifier {
   override apply(playerPokemon: PlayerPokemon): boolean {
     let matchingEvolution = pokemonEvolutions.hasOwnProperty(playerPokemon.species.speciesId)
       ? pokemonEvolutions[playerPokemon.species.speciesId].find(
-          e =>
-            e.item === this.type.evolutionItem &&
-            (e.evoFormKey === null || (e.preFormKey || "") === playerPokemon.getFormKey()) &&
-            (!e.condition || e.condition.predicate(playerPokemon)),
+          e => e.evoItem === this.type.evolutionItem && e.validate(playerPokemon, false, e.item!),
         )
       : null;
 
     if (!matchingEvolution && playerPokemon.isFusion()) {
       matchingEvolution = pokemonEvolutions[playerPokemon.fusionSpecies!.speciesId].find(
-        e =>
-          e.item === this.type.evolutionItem && // TODO: is the bang correct?
-          (e.evoFormKey === null || (e.preFormKey || "") === playerPokemon.getFusionFormKey()) &&
-          (!e.condition || e.condition.predicate(playerPokemon)),
+        e => e.evoItem === this.type.evolutionItem && e.validate(playerPokemon, true, e.item!),
       );
       if (matchingEvolution) {
         matchingEvolution = new FusionSpeciesFormEvolution(playerPokemon.species.speciesId, matchingEvolution);
@@ -2918,11 +2914,10 @@ export class MoneyRewardModifier extends ConsumableModifier {
 
     globalScene.getPlayerParty().map(p => {
       if (p.species?.speciesId === SpeciesId.GIMMIGHOUL || p.fusionSpecies?.speciesId === SpeciesId.GIMMIGHOUL) {
-        p.evoCounter
-          ? (p.evoCounter += Math.min(Math.floor(this.moneyMultiplier), 3))
-          : (p.evoCounter = Math.min(Math.floor(this.moneyMultiplier), 3));
+        const factor = Math.min(Math.floor(this.moneyMultiplier), 3);
         const modifier = getModifierType(modifierTypes.EVOLUTION_TRACKER_GIMMIGHOUL).newModifier(
           p,
+          factor,
         ) as EvoTrackerModifier;
         globalScene.addModifier(modifier);
       }
@@ -3215,7 +3210,7 @@ export abstract class HeldItemTransferModifier extends PokemonHeldItemModifier {
    * @returns the opponents of the source {@linkcode Pokemon}
    */
   getTargets(pokemon?: Pokemon, ..._args: unknown[]): Pokemon[] {
-    return pokemon instanceof Pokemon ? pokemon.getOpponents() : [];
+    return pokemon?.getOpponents?.() ?? [];
   }
 
   /**
@@ -3787,7 +3782,7 @@ export function overrideModifiers(isPlayer = true): void {
     const modifierFunc = modifierTypes[item.name];
     let modifierType: ModifierType | null = modifierFunc();
 
-    if (modifierType instanceof ModifierTypeGenerator) {
+    if (modifierType.is("ModifierTypeGenerator")) {
       const pregenArgs = "type" in item && item.type !== null ? [item.type] : undefined;
       modifierType = modifierType.generateType([], pregenArgs);
     }
@@ -3829,7 +3824,7 @@ export function overrideHeldItems(pokemon: Pokemon, isPlayer = true): void {
     let modifierType: ModifierType | null = modifierFunc();
     const qty = item.count || 1;
 
-    if (modifierType instanceof ModifierTypeGenerator) {
+    if (modifierType.is("ModifierTypeGenerator")) {
       const pregenArgs = "type" in item && item.type !== null ? [item.type] : undefined;
       modifierType = modifierType.generateType([], pregenArgs);
     }
@@ -3847,3 +3842,102 @@ export function overrideHeldItems(pokemon: Pokemon, isPlayer = true): void {
     }
   }
 }
+
+/**
+ * Private map from modifier strings to their constructors.
+ *
+ * @remarks
+ * Used for {@linkcode Modifier.is} to check if a modifier is of a certain type without
+ * requiring modifier types to be imported in every file.
+ */
+const ModifierClassMap = Object.freeze({
+  PersistentModifier,
+  ConsumableModifier,
+  AddPokeballModifier,
+  AddVoucherModifier,
+  LapsingPersistentModifier,
+  DoubleBattleChanceBoosterModifier,
+  TempStatStageBoosterModifier,
+  TempCritBoosterModifier,
+  MapModifier,
+  MegaEvolutionAccessModifier,
+  GigantamaxAccessModifier,
+  TerastallizeAccessModifier,
+  PokemonHeldItemModifier,
+  LapsingPokemonHeldItemModifier,
+  BaseStatModifier,
+  EvoTrackerModifier,
+  PokemonBaseStatTotalModifier,
+  PokemonBaseStatFlatModifier,
+  PokemonIncrementingStatModifier,
+  StatBoosterModifier,
+  SpeciesStatBoosterModifier,
+  CritBoosterModifier,
+  SpeciesCritBoosterModifier,
+  AttackTypeBoosterModifier,
+  SurviveDamageModifier,
+  BypassSpeedChanceModifier,
+  FlinchChanceModifier,
+  TurnHealModifier,
+  TurnStatusEffectModifier,
+  HitHealModifier,
+  LevelIncrementBoosterModifier,
+  BerryModifier,
+  PreserveBerryModifier,
+  PokemonInstantReviveModifier,
+  ResetNegativeStatStageModifier,
+  FieldEffectModifier,
+  ConsumablePokemonModifier,
+  TerrastalizeModifier,
+  PokemonHpRestoreModifier,
+  PokemonStatusHealModifier,
+  ConsumablePokemonMoveModifier,
+  PokemonPpRestoreModifier,
+  PokemonAllMovePpRestoreModifier,
+  PokemonPpUpModifier,
+  PokemonNatureChangeModifier,
+  PokemonLevelIncrementModifier,
+  TmModifier,
+  RememberMoveModifier,
+  EvolutionItemModifier,
+  FusePokemonModifier,
+  MultipleParticipantExpBonusModifier,
+  HealingBoosterModifier,
+  ExpBoosterModifier,
+  PokemonExpBoosterModifier,
+  ExpShareModifier,
+  ExpBalanceModifier,
+  PokemonFriendshipBoosterModifier,
+  PokemonNatureWeightModifier,
+  PokemonMoveAccuracyBoosterModifier,
+  PokemonMultiHitModifier,
+  PokemonFormChangeItemModifier,
+  MoneyRewardModifier,
+  DamageMoneyRewardModifier,
+  MoneyInterestModifier,
+  HiddenAbilityRateBoosterModifier,
+  ShinyRateBoosterModifier,
+  CriticalCatchChanceBoosterModifier,
+  LockModifierTiersModifier,
+  HealShopCostModifier,
+  BoostBugSpawnModifier,
+  SwitchEffectTransferModifier,
+  HeldItemTransferModifier,
+  TurnHeldItemTransferModifier,
+  ContactHeldItemTransferChanceModifier,
+  IvScannerModifier,
+  ExtraModifierModifier,
+  TempExtraModifierModifier,
+  EnemyPersistentModifier,
+  EnemyDamageMultiplierModifier,
+  EnemyDamageBoosterModifier,
+  EnemyDamageReducerModifier,
+  EnemyTurnHealModifier,
+  EnemyAttackStatusEffectChanceModifier,
+  EnemyStatusEffectHealChanceModifier,
+  EnemyEndureChanceModifier,
+  EnemyFusionChanceModifier,
+  MoneyMultiplierModifier,
+});
+
+export type ModifierConstructorMap = typeof ModifierClassMap;