Merge branch 'beta' into activation-order

package-lock.json

@@ -10,6 +10,7 @@
       "hasInstallScript": true,
       "dependencies": {
         "@material/material-color-utilities": "^0.2.7",
+        "compare-versions": "^6.1.1",
         "crypto-js": "^4.2.0",
         "i18next": "^24.2.2",
         "i18next-browser-languagedetector": "^8.0.4",
@@ -3605,6 +3606,12 @@
         "node": ">=18"
       }
     },
+    "node_modules/compare-versions": {
+      "version": "6.1.1",
+      "resolved": "https://registry.npmjs.org/compare-versions/-/compare-versions-6.1.1.tgz",
+      "integrity": "sha512-4hm4VPpIecmlg59CHXnRDnqGplJFrbLG4aFEl5vl6cK1u76ws3LLvX7ikFnTDl5vo39sjWD6AaDPYodJp/NNHg==",
+      "license": "MIT"
+    },
     "node_modules/concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",

package.json

@@ -55,6 +55,7 @@
   },
   "dependencies": {
     "@material/material-color-utilities": "^0.2.7",
+    "compare-versions": "^6.1.1",
     "crypto-js": "^4.2.0",
     "i18next": "^24.2.2",
     "i18next-browser-languagedetector": "^8.0.4",

src/@types/SessionSaveMigrator.ts

@@ -0,0 +1,6 @@
+import type { SessionSaveData } from "#app/system/game-data";
+
+export interface SessionSaveMigrator {
+  version: string;
+  migrate: (data: SessionSaveData) => void;
+}

src/@types/SettingsSaveMigrator.ts

@@ -0,0 +1,5 @@
+export interface SettingsSaveMigrator {
+  version: string;
+  // biome-ignore lint/complexity/noBannedTypes: TODO - refactor settings
+  migrate: (data: Object) => void;
+}

src/@types/SystemSaveMigrator.ts

@@ -0,0 +1,6 @@
+import type { SystemSaveData } from "#app/system/game-data";
+
+export interface SystemSaveMigrator {
+  version: string;
+  migrate: (data: SystemSaveData) => void;
+}

src/battle-scene.ts

@@ -1539,8 +1539,6 @@ export default class BattleScene extends SceneBase {
       this.currentBattle.mysteryEncounterType = mysteryEncounterType;
     }
 
-    //this.pushPhase(new TrainerMessageTestPhase(this, TrainerType.RIVAL, TrainerType.RIVAL_2, TrainerType.RIVAL_3, TrainerType.RIVAL_4, TrainerType.RIVAL_5, TrainerType.RIVAL_6));
-
     if (!waveIndex && lastBattle) {
       const isWaveIndexMultipleOfTen = !(lastBattle.waveIndex % 10);
       const isEndlessOrDaily = this.gameMode.hasShortBiomes || this.gameMode.isDaily;

src/data/ability.ts

@@ -1000,7 +1000,7 @@ export class PostDefendContactApplyStatusEffectAbAttr extends PostDefendAbAttr {
 
   override canApplyPostDefend(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult | null, args: any[]): boolean {
     const effect = this.effects.length === 1 ? this.effects[0] : this.effects[pokemon.randSeedInt(this.effects.length)];
-    return move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon) && !attacker.status
+    return move.doesFlagEffectApply({flag: MoveFlags.MAKES_CONTACT, user: attacker, target: pokemon}) && !attacker.status
       && (this.chance === -1 || pokemon.randSeedInt(100) < this.chance) && !move.hitsSubstitute(attacker, pokemon)
       && attacker.canSetStatus(effect, true, false, pokemon);
   }
@@ -1040,7 +1040,7 @@ export class PostDefendContactApplyTagChanceAbAttr extends PostDefendAbAttr {
   }
 
   override canApplyPostDefend(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult | null, args: any[]): boolean {
-    return move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon) && pokemon.randSeedInt(100) < this.chance
+    return move.doesFlagEffectApply({flag: MoveFlags.MAKES_CONTACT, user: attacker, target: pokemon}) && pokemon.randSeedInt(100) < this.chance
       && !move.hitsSubstitute(attacker, pokemon) && attacker.canAddTag(this.tagType);
   }
 
@@ -1087,7 +1087,7 @@ export class PostDefendContactDamageAbAttr extends PostDefendAbAttr {
   }
 
   override canApplyPostDefend(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult | null, args: any[]): boolean {
-    return !simulated && move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon)
+    return !simulated && move.doesFlagEffectApply({flag: MoveFlags.MAKES_CONTACT, user: attacker, target: pokemon})
       && !attacker.hasAbilityWithAttr(BlockNonDirectDamageAbAttr) && !move.hitsSubstitute(attacker, pokemon);
   }
 
@@ -1120,8 +1120,7 @@ export class PostDefendPerishSongAbAttr extends PostDefendAbAttr {
   }
 
   override canApplyPostDefend(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult | null, args: any[]): boolean {
-    return (move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon) && !move.hitsSubstitute(attacker, pokemon))
+    return move.doesFlagEffectApply({flag: MoveFlags.MAKES_CONTACT, user: attacker, target: pokemon}) && !attacker.getTag(BattlerTagType.PERISH_SONG);
-      && !attacker.getTag(BattlerTagType.PERISH_SONG);
   }
 
   override applyPostDefend(pokemon: Pokemon, _passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, _hitResult: HitResult, _args: any[]): void {
@@ -1165,7 +1164,7 @@ export class PostDefendAbilitySwapAbAttr extends PostDefendAbAttr {
   }
 
   override canApplyPostDefend(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult | null, args: any[]): boolean {
-    return move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon)
+    return move.doesFlagEffectApply({flag: MoveFlags.MAKES_CONTACT, user: attacker, target: pokemon})
       && attacker.getAbility().isSwappable && !move.hitsSubstitute(attacker, pokemon);
   }
 
@@ -1191,7 +1190,7 @@ export class PostDefendAbilityGiveAbAttr extends PostDefendAbAttr {
   }
 
   override canApplyPostDefend(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult | null, args: any[]): boolean {
-    return move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon) && attacker.getAbility().isSuppressable
+    return move.doesFlagEffectApply({flag: MoveFlags.MAKES_CONTACT, user: attacker, target: pokemon}) && attacker.getAbility().isSuppressable
       && !attacker.getAbility().hasAttr(PostDefendAbilityGiveAbAttr) && !move.hitsSubstitute(attacker, pokemon);
   }
 
@@ -1222,7 +1221,7 @@ export class PostDefendMoveDisableAbAttr extends PostDefendAbAttr {
 
   override canApplyPostDefend(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, hitResult: HitResult | null, args: any[]): boolean {
     return attacker.getTag(BattlerTagType.DISABLED) === null && !move.hitsSubstitute(attacker, pokemon)
-      && move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon) && (this.chance === -1 || pokemon.randSeedInt(100) < this.chance);
+      && move.doesFlagEffectApply({flag: MoveFlags.MAKES_CONTACT, user: attacker, target: pokemon}) && (this.chance === -1 || pokemon.randSeedInt(100) < this.chance);
   }
 
   override applyPostDefend(pokemon: Pokemon, _passive: boolean, simulated: boolean, attacker: Pokemon, move: Move, _hitResult: HitResult, _args: any[]): void {
@@ -1927,7 +1926,7 @@ export class PostAttackApplyStatusEffectAbAttr extends PostAttackAbAttr {
       super.canApplyPostAttack(pokemon, passive, simulated, attacker, move, hitResult, args)
       && !(pokemon !== attacker && move.hitsSubstitute(attacker, pokemon))
       && (simulated || !attacker.hasAbilityWithAttr(IgnoreMoveEffectsAbAttr) && pokemon !== attacker
-      && (!this.contactRequired || move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon)) && pokemon.randSeedInt(100) < this.chance && !pokemon.status)
+      && (!this.contactRequired || move.doesFlagEffectApply({flag: MoveFlags.MAKES_CONTACT, user: attacker, target: pokemon})) && pokemon.randSeedInt(100) < this.chance && !pokemon.status)
     ) {
       const effect = this.effects.length === 1 ? this.effects[0] : this.effects[pokemon.randSeedInt(this.effects.length)];
       return simulated || attacker.canSetStatus(effect, true, false, pokemon);
@@ -1966,7 +1965,7 @@ export class PostAttackApplyBattlerTagAbAttr extends PostAttackAbAttr {
     /**Battler tags inflicted by abilities post attacking are also considered additional effects.*/
     return super.canApplyPostAttack(pokemon, passive, simulated, attacker, move, hitResult, args) &&
       !attacker.hasAbilityWithAttr(IgnoreMoveEffectsAbAttr) && pokemon !== attacker &&
-      (!this.contactRequired || move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon)) &&
+      (!this.contactRequired || move.doesFlagEffectApply({flag: MoveFlags.MAKES_CONTACT, user: attacker, target: pokemon})) &&
       pokemon.randSeedInt(100) < this.chance(attacker, pokemon, move) && !pokemon.status;
   }
 
@@ -2298,6 +2297,11 @@ export class PostSummonAbAttr extends AbAttr {
   applyPostSummon(pokemon: Pokemon, passive: boolean, simulated: boolean, args: any[]): void {}
 }
 
+/**
+ * Base class for ability attributes which remove an effect on summon
+ */
+export class PostSummonRemoveEffectAbAttr extends PostSummonAbAttr {}
+
 /**
  * Removes specified arena tags when a Pokemon is summoned.
  */
@@ -2408,6 +2412,31 @@ export class PostSummonAddBattlerTagAbAttr extends PostSummonAbAttr {
   }
 }
 
+/**
+ * Removes Specific battler tags when a Pokemon is summoned
+ *
+ * This should realistically only ever activate on gain rather than on summon
+ */
+export class PostSummonRemoveBattlerTagAbAttr extends PostSummonRemoveEffectAbAttr {
+  private immuneTags: BattlerTagType[];
+
+  /**
+   * @param immuneTags - The {@linkcode BattlerTagType | battler tags} the Pokémon is immune to.
+   */
+  constructor(...immuneTags: BattlerTagType[]) {
+    super();
+    this.immuneTags = immuneTags;
+  }
+
+  public override canApplyPostSummon(pokemon: Pokemon, passive: boolean, simulated: boolean, args: any[]): boolean {
+    return this.immuneTags.some(tagType => !!pokemon.getTag(tagType));
+  }
+
+  public override applyPostSummon(pokemon: Pokemon, passive: boolean, simulated: boolean, args: any[]): void {
+    this.immuneTags.forEach(tagType => pokemon.removeTag(tagType));
+  }
+}
+
 export class PostSummonStatStageChangeAbAttr extends PostSummonAbAttr {
   private stats: BattleStat[];
   private stages: number;
@@ -2595,6 +2624,43 @@ export class PostSummonTerrainChangeAbAttr extends PostSummonAbAttr {
   }
 }
 
+/**
+ * Heals a status effect if the Pokemon is afflicted with it upon switch in (or gain)
+ */
+export class PostSummonHealStatusAbAttr extends PostSummonRemoveEffectAbAttr {
+  private immuneEffects: StatusEffect[];
+  private statusHealed: StatusEffect;
+
+  /**
+   * @param immuneEffects - The {@linkcode StatusEffect}s the Pokémon is immune to.
+   */
+  constructor(...immuneEffects: StatusEffect[]) {
+    super();
+    this.immuneEffects = immuneEffects;
+  }
+
+  public override canApplyPostSummon(pokemon: Pokemon, passive: boolean, simulated: boolean, args: any[]): boolean {
+    const status = pokemon.status?.effect;
+    return !Utils.isNullOrUndefined(status) && (this.immuneEffects.length < 1 || this.immuneEffects.includes(status))
+  }
+
+  public override applyPostSummon(pokemon: Pokemon, passive: boolean, simulated: boolean, args: any[]): void {
+    const status = pokemon.status?.effect;
+    if (!Utils.isNullOrUndefined(status)) {
+      this.statusHealed = status;
+      pokemon.resetStatus(false);
+      pokemon.updateInfo();
+    }
+  }
+
+  public override getTriggerMessage(_pokemon: Pokemon, _abilityName: string, ..._args: any[]): string | null {
+    if (this.statusHealed) {
+      return getStatusEffectHealText(this.statusHealed, getPokemonNameWithAffix(_pokemon));
+    }
+    return null;
+  }
+}
+
 export class PostSummonFormChangeAbAttr extends PostSummonAbAttr {
   private formFunc: (p: Pokemon) => number;
 
@@ -3501,8 +3567,18 @@ export class BonusCritAbAttr extends AbAttr {
   constructor() {
     super(false);
   }
-  override apply(pokemon: Pokemon, passive: boolean, simulated: boolean, cancelled: Utils.BooleanHolder, args: any[]): void {
+
-    (args[0] as Utils.BooleanHolder).value = true;
+  /**
+   * Apply the bonus crit ability by increasing the value in the provided number holder by 1
+   * 
+   * @param pokemon The pokemon with the BonusCrit ability (unused)
+   * @param passive Unused
+   * @param simulated Unused
+   * @param cancelled Unused
+   * @param args Args[0] is a number holder containing the crit stage.
+   */
+  override apply(pokemon: Pokemon, passive: boolean, simulated: boolean, cancelled: Utils.BooleanHolder, args: [Utils.NumberHolder, ...any]): void {
+    (args[0] as Utils.NumberHolder).value += 1;
   }
 }
 
@@ -4753,7 +4829,7 @@ export class PostFaintContactDamageAbAttr extends PostFaintAbAttr {
   }
 
   override canApplyPostFaint(pokemon: Pokemon, passive: boolean, simulated: boolean, attacker?: Pokemon, move?: Move, hitResult?: HitResult, ...args: any[]): boolean {
-    const diedToDirectDamage = move !== undefined && attacker !== undefined && move.checkFlag(MoveFlags.MAKES_CONTACT, attacker, pokemon);
+    const diedToDirectDamage = move !== undefined && attacker !== undefined && move.doesFlagEffectApply({flag: MoveFlags.MAKES_CONTACT, user: attacker, target: pokemon});
     const cancelled = new Utils.BooleanHolder(false);
     globalScene.getField(true).map(p => applyAbAttrs(FieldPreventExplosiveMovesAbAttr, p, cancelled, simulated));
     if (!diedToDirectDamage || cancelled.value || attacker!.hasAbilityWithAttr(BlockNonDirectDamageAbAttr)) {
@@ -6299,6 +6375,7 @@ export function initAbilities() {
       .ignorable(),
     new Ability(Abilities.LIMBER, 3)
       .attr(StatusEffectImmunityAbAttr, StatusEffect.PARALYSIS)
+      .attr(PostSummonHealStatusAbAttr, StatusEffect.PARALYSIS)
       .ignorable(),
     new Ability(Abilities.SAND_VEIL, 3)
       .attr(StatMultiplierAbAttr, Stat.EVA, 1.2)
@@ -6316,6 +6393,7 @@ export function initAbilities() {
       .ignorable(),
     new Ability(Abilities.OBLIVIOUS, 3)
       .attr(BattlerTagImmunityAbAttr, [ BattlerTagType.INFATUATED, BattlerTagType.TAUNT ])
+      .attr(PostSummonRemoveBattlerTagAbAttr, BattlerTagType.INFATUATED, BattlerTagType.TAUNT)
       .attr(IntimidateImmunityAbAttr)
       .ignorable(),
     new Ability(Abilities.CLOUD_NINE, 3)
@@ -6328,6 +6406,7 @@ export function initAbilities() {
       .attr(StatMultiplierAbAttr, Stat.ACC, 1.3),
     new Ability(Abilities.INSOMNIA, 3)
       .attr(StatusEffectImmunityAbAttr, StatusEffect.SLEEP)
+      .attr(PostSummonHealStatusAbAttr, StatusEffect.SLEEP)
       .attr(BattlerTagImmunityAbAttr, BattlerTagType.DROWSY)
       .ignorable(),
     new Ability(Abilities.COLOR_CHANGE, 3)
@@ -6335,6 +6414,7 @@ export function initAbilities() {
       .condition(getSheerForceHitDisableAbCondition()),
     new Ability(Abilities.IMMUNITY, 3)
       .attr(StatusEffectImmunityAbAttr, StatusEffect.POISON, StatusEffect.TOXIC)
+      .attr(PostSummonHealStatusAbAttr, StatusEffect.POISON, StatusEffect.TOXIC)
       .ignorable(),
     new Ability(Abilities.FLASH_FIRE, 3)
       .attr(TypeImmunityAddBattlerTagAbAttr, PokemonType.FIRE, BattlerTagType.FIRE_BOOST, 1)
@@ -6344,6 +6424,7 @@ export function initAbilities() {
       .ignorable(),
     new Ability(Abilities.OWN_TEMPO, 3)
       .attr(BattlerTagImmunityAbAttr, BattlerTagType.CONFUSED)
+      .attr(PostSummonRemoveBattlerTagAbAttr, BattlerTagType.CONFUSED)
       .attr(IntimidateImmunityAbAttr)
       .ignorable(),
     new Ability(Abilities.SUCTION_CUPS, 3)
@@ -6409,9 +6490,11 @@ export function initAbilities() {
       .ignorable(),
     new Ability(Abilities.MAGMA_ARMOR, 3)
       .attr(StatusEffectImmunityAbAttr, StatusEffect.FREEZE)
+      .attr(PostSummonHealStatusAbAttr, StatusEffect.FREEZE)
       .ignorable(),
     new Ability(Abilities.WATER_VEIL, 3)
       .attr(StatusEffectImmunityAbAttr, StatusEffect.BURN)
+      .attr(PostSummonHealStatusAbAttr, StatusEffect.BURN)
       .ignorable(),
     new Ability(Abilities.MAGNET_PULL, 3)
       .attr(ArenaTrapAbAttr, (user, target) => {
@@ -6505,6 +6588,7 @@ export function initAbilities() {
       .attr(DoubleBattleChanceAbAttr),
     new Ability(Abilities.VITAL_SPIRIT, 3)
       .attr(StatusEffectImmunityAbAttr, StatusEffect.SLEEP)
+      .attr(PostSummonHealStatusAbAttr, StatusEffect.SLEEP)
       .attr(BattlerTagImmunityAbAttr, BattlerTagType.DROWSY)
       .ignorable(),
     new Ability(Abilities.WHITE_SMOKE, 3)
@@ -6843,6 +6927,7 @@ export function initAbilities() {
       .attr(MoveTypeChangeAbAttr, PokemonType.ICE, 1.2, (user, target, move) => move.type === PokemonType.NORMAL && !move.hasAttr(VariableMoveTypeAttr)),
     new Ability(Abilities.SWEET_VEIL, 6)
       .attr(UserFieldStatusEffectImmunityAbAttr, StatusEffect.SLEEP)
+      .attr(PostSummonUserFieldRemoveStatusEffectAbAttr, StatusEffect.SLEEP)
       .attr(UserFieldBattlerTagImmunityAbAttr, BattlerTagType.DROWSY)
       .ignorable()
       .partial(), // Mold Breaker ally should not be affected by Sweet Veil
@@ -6927,6 +7012,7 @@ export function initAbilities() {
       .attr(ReceivedTypeDamageMultiplierAbAttr, PokemonType.FIRE, 0.5)
       .attr(MoveTypePowerBoostAbAttr, PokemonType.WATER, 2)
       .attr(StatusEffectImmunityAbAttr, StatusEffect.BURN)
+      .attr(PostSummonHealStatusAbAttr, StatusEffect.BURN)
       .ignorable(),
     new Ability(Abilities.STEELWORKER, 7)
       .attr(MoveTypePowerBoostAbAttr, PokemonType.STEEL),
@@ -7205,6 +7291,7 @@ export function initAbilities() {
     new Ability(Abilities.THERMAL_EXCHANGE, 9)
       .attr(PostDefendStatStageChangeAbAttr, (target, user, move) => user.getMoveType(move) === PokemonType.FIRE && move.category !== MoveCategory.STATUS, Stat.ATK, 1)
       .attr(StatusEffectImmunityAbAttr, StatusEffect.BURN)
+      .attr(PostSummonHealStatusAbAttr, StatusEffect.BURN)
       .ignorable(),
     new Ability(Abilities.ANGER_SHELL, 9)
       .attr(PostDefendHpGatedStatStageChangeAbAttr, (target, user, move) => move.category !== MoveCategory.STATUS, 0.5, [ Stat.ATK, Stat.SPATK, Stat.SPD ], 1)

src/data/battle-anims.ts

@@ -1428,7 +1428,8 @@ export class MoveAnim extends BattleAnim {
   public move: Moves;
 
   constructor(move: Moves, user: Pokemon, target: BattlerIndex, playOnEmptyField = false) {
-    super(user, globalScene.getField()[target], playOnEmptyField);
+    // Set target to the user pokemon if no target is found to avoid crashes
+    super(user, globalScene.getField()[target] ?? user, playOnEmptyField);
 
     this.move = move;
   }

src/data/moves/move.ts

@@ -346,7 +346,7 @@ export default class Move implements Localizable {
    * @param target The {@linkcode Pokemon} targeted by this move
    * @returns `true` if the move can bypass the target's Substitute; `false` otherwise.
    */
-  hitsSubstitute(user: Pokemon, target: Pokemon | null): boolean {
+  hitsSubstitute(user: Pokemon, target?: Pokemon): boolean {
     if ([ MoveTarget.USER, MoveTarget.USER_SIDE, MoveTarget.ENEMY_SIDE, MoveTarget.BOTH_SIDES ].includes(this.moveTarget)
         || !target?.getTag(BattlerTagType.SUBSTITUTE)) {
       return false;
@@ -618,12 +618,30 @@ export default class Move implements Localizable {
 
   /**
    * Checks if the move flag applies to the pokemon(s) using/receiving the move
+   *
+   * This method will take the `user`'s ability into account when reporting flags, e.g.
+   * calling this method for {@linkcode MoveFlags.MAKES_CONTACT | MAKES_CONTACT}
+   * will return `false` if the user has a {@linkcode Abilities.LONG_REACH} that is not being suppressed.
+   *
+   * **Note:** This method only checks if the move should have effectively have the flag applied to its use.
+   * It does *not* check whether the flag will trigger related effects.
+   * For example using this method to check {@linkcode MoveFlags.WIND_MOVE}
+   * will not consider {@linkcode Abilities.WIND_RIDER | Wind Rider }.
+   *
+   * To simply check whether the move has a flag, use {@linkcode hasFlag}.
    * @param flag {@linkcode MoveFlags} MoveFlag to check on user and/or target
    * @param user {@linkcode Pokemon} the Pokemon using the move
    * @param target {@linkcode Pokemon} the Pokemon receiving the move
+   * @param isFollowUp (defaults to `false`) `true` if the move was used as a follow up
    * @returns boolean
+   * @see {@linkcode hasFlag}
    */
-  checkFlag(flag: MoveFlags, user: Pokemon, target: Pokemon | null): boolean {
+  doesFlagEffectApply({ flag, user, target, isFollowUp = false }: {
+    flag: MoveFlags;
+    user: Pokemon;
+    target?: Pokemon;
+    isFollowUp?: boolean;
+  }): boolean {
     // special cases below, eg: if the move flag is MAKES_CONTACT, and the user pokemon has an ability that ignores contact (like "Long Reach"), then overrides and move does not make contact
     switch (flag) {
       case MoveFlags.MAKES_CONTACT:
@@ -633,16 +651,18 @@ export default class Move implements Localizable {
         break;
       case MoveFlags.IGNORE_ABILITIES:
         if (user.hasAbilityWithAttr(MoveAbilityBypassAbAttr)) {
-          const abilityEffectsIgnored = new Utils.BooleanHolder(false);
+          const abilityEffectsIgnored = new Utils.BooleanHolder(false); 
           applyAbAttrs(MoveAbilityBypassAbAttr, user, abilityEffectsIgnored, false, this);
           if (abilityEffectsIgnored.value) {
             return true;
           }
+          // Sunsteel strike, Moongeist beam, and photon geyser will not ignore abilities if invoked
+          // by another move, such as via metronome.
         }
-        break;
+        return this.hasFlag(MoveFlags.IGNORE_ABILITIES) && !isFollowUp;
       case MoveFlags.IGNORE_PROTECT:
         if (user.hasAbilityWithAttr(IgnoreProtectOnContactAbAttr)
-          && this.checkFlag(MoveFlags.MAKES_CONTACT, user, null)) {
+          && this.doesFlagEffectApply({ flag: MoveFlags.MAKES_CONTACT, user })) {
           return true;
         }
         break;
@@ -1214,7 +1234,7 @@ export class MoveEffectAttr extends MoveAttr {
   canApply(user: Pokemon, target: Pokemon, move: Move, args?: any[]) {
     return !! (this.selfTarget ? user.hp && !user.getTag(BattlerTagType.FRENZY) : target.hp)
            && (this.selfTarget || !target.getTag(BattlerTagType.PROTECTED) ||
-                move.checkFlag(MoveFlags.IGNORE_PROTECT, user, target));
+                move.doesFlagEffectApply({ flag: MoveFlags.IGNORE_PROTECT, user, target }));
   }
 
   /** Applies move effects so long as they are able based on {@linkcode canApply} */
@@ -2423,12 +2443,8 @@ export class StatusEffectAttr extends MoveEffectAttr {
     const statusCheck = moveChance < 0 || moveChance === 100 || user.randSeedInt(100) < moveChance;
     if (statusCheck) {
       const pokemon = this.selfTarget ? user : target;
-      if (pokemon.status) {
+      if (pokemon.status && !this.overrideStatus) {
-        if (this.overrideStatus) {
+        return false;
-          pokemon.resetStatus();
-        } else {
-          return false;
-        }
       }
 
       if (user !== target && target.isSafeguarded(user)) {
@@ -2437,8 +2453,8 @@ export class StatusEffectAttr extends MoveEffectAttr {
         }
         return false;
       }
-      if ((!pokemon.status || (pokemon.status.effect === this.effect && moveChance < 0))
+      if (((!pokemon.status || this.overrideStatus) || (pokemon.status.effect === this.effect && moveChance < 0))
-        && pokemon.trySetStatus(this.effect, true, user, this.turnsRemaining)) {
+        && pokemon.trySetStatus(this.effect, true, user, this.turnsRemaining, null, this.overrideStatus)) {
         applyPostAttackAbAttrs(ConfusionOnStatusEffectAbAttr, user, target, move, null, false, this.effect);
         return true;
       }
@@ -5908,7 +5924,7 @@ export class AddArenaTagAttr extends MoveEffectAttr {
     }
 
     if ((move.chance < 0 || move.chance === 100 || user.randSeedInt(100) < move.chance) && user.getLastXMoves(1)[0]?.result === MoveResult.SUCCESS) {
-      const side = (this.selfSideTarget ? user : target).isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
+      const side = ((this.selfSideTarget ? user : target).isPlayer() !== (move.hasAttr(AddArenaTrapTagAttr) && target === user)) ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
       globalScene.arena.addTag(this.tagType, this.turnCount, move.id, user.id, side);
       return true;
     }
@@ -5957,7 +5973,7 @@ export class RemoveArenaTagsAttr extends MoveEffectAttr {
 export class AddArenaTrapTagAttr extends AddArenaTagAttr {
   getCondition(): MoveConditionFunc {
     return (user, target, move) => {
-      const side = (this.selfSideTarget ? user : target).isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
+      const side = (this.selfSideTarget !== user.isPlayer()) ? ArenaTagSide.ENEMY : ArenaTagSide.PLAYER;
       const tag = globalScene.arena.getTagOnSide(this.tagType, side) as ArenaTrapTag;
       if (!tag) {
         return true;

src/field/pokemon.ts

@@ -264,6 +264,7 @@ import { StatusEffect } from "#enums/status-effect";
 import { doShinySparkleAnim } from "#app/field/anims";
 import { MoveFlags } from "#enums/MoveFlags";
 import { timedEventManager } from "#app/global-event-manager";
+import { ResetStatusPhase } from "#app/phases/reset-status-phase";
 
 export enum LearnMoveSituation {
   MISC,
@@ -1340,8 +1341,9 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   /**
-   * Retrieves the critical-hit stage considering the move used and the Pokemon
+   * Calculate the critical-hit stage of a move used against this pokemon by
-   * who used it.
+   * the given source
+   * 
    * @param source the {@linkcode Pokemon} who using the move
    * @param move the {@linkcode Move} being used
    * @returns the final critical-hit stage value
@@ -1360,14 +1362,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       source.isPlayer(),
       critStage,
     );
-    const bonusCrit = new Utils.BooleanHolder(false);
+    applyAbAttrs(BonusCritAbAttr, source, null, false, critStage)
-    //@ts-ignore
-    if (applyAbAttrs(BonusCritAbAttr, source, null, false, bonusCrit)) {
-      // TODO: resolve ts-ignore. This is a promise. Checking a promise is bogus.
-      if (bonusCrit.value) {
-        critStage.value += 1;
-      }
-    }
     const critBoostTag = source.getTag(CritBoostTag);
     if (critBoostTag) {
       if (critBoostTag instanceof DragonCheerTag) {
@@ -4819,7 +4814,6 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     if (newTag.canAdd(this)) {
       this.summonData.tags.push(newTag);
       newTag.onAdd(this);
-
       return true;
     }
 
@@ -5490,8 +5484,9 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     sourcePokemon: Pokemon | null = null,
     turnsRemaining = 0,
     sourceText: string | null = null,
+    overrideStatus?: boolean
   ): boolean {
-    if (!this.canSetStatus(effect, asPhase, false, sourcePokemon)) {
+    if (!this.canSetStatus(effect, asPhase, overrideStatus, sourcePokemon)) {
       return false;
     }
     if (this.isFainted() && effect !== StatusEffect.FAINT) {
@@ -5507,6 +5502,9 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     }
 
     if (asPhase) {
+      if (overrideStatus) {
+        this.resetStatus(false);
+      }
       globalScene.unshiftPhase(
         new ObtainStatusEffectPhase(
           this.getBattlerIndex(),
@@ -5546,20 +5544,6 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     effect = effect!; // If `effect` is undefined then `trySetStatus()` will have already returned early via the `canSetStatus()` call
     this.status = new Status(effect, 0, sleepTurnsRemaining?.value);
 
-    if (effect !== StatusEffect.FAINT) {
-      globalScene.triggerPokemonFormChange(
-        this,
-        SpeciesFormChangeStatusEffectTrigger,
-        true,
-      );
-      applyPostSetStatusAbAttrs(
-        PostSetStatusAbAttr,
-        this,
-        effect,
-        sourcePokemon,
-      );
-    }
-
     return true;
   }
 
@@ -5574,21 +5558,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     if (!revive && lastStatus === StatusEffect.FAINT) {
       return;
     }
-    this.status = null;
+    globalScene.unshiftPhase(new ResetStatusPhase(this, confusion, reloadAssets));
-    if (lastStatus === StatusEffect.SLEEP) {
-      this.setFrameRate(10);
-      if (this.getTag(BattlerTagType.NIGHTMARE)) {
-        this.lapseTag(BattlerTagType.NIGHTMARE);
-      }
-    }
-    if (confusion) {
-      if (this.getTag(BattlerTagType.CONFUSED)) {
-        this.lapseTag(BattlerTagType.CONFUSED);
-      }
-    }
-    if (reloadAssets) {
-      this.loadAssets(false).then(() => this.playAnim());
-    }
   }
 
   /**

src/modifier/modifier.ts

@@ -2734,7 +2734,7 @@ export class PokemonMoveAccuracyBoosterModifier extends PokemonHeldItemModifier
    * @returns always `true`
    */
   override apply(_pokemon: Pokemon, moveAccuracy: NumberHolder): boolean {
-    moveAccuracy.value = Math.min(moveAccuracy.value + this.accuracyAmount * this.getStackCount(), 100);
+    moveAccuracy.value = moveAccuracy.value + this.accuracyAmount * this.getStackCount();
 
     return true;
   }

src/phases/add-enemy-buff-modifier-phase.ts

@@ -9,10 +9,6 @@ import { Phase } from "#app/phase";
 import { globalScene } from "#app/global-scene";
 
 export class AddEnemyBuffModifierPhase extends Phase {
-  constructor() {
-    super();
-  }
-
   start() {
     super.start();
 

src/phases/attempt-run-phase.ts

@@ -1,10 +1,10 @@
 import { applyAbAttrs, applyPreLeaveFieldAbAttrs, PreLeaveFieldAbAttr, RunSuccessAbAttr } from "#app/data/ability";
-import { Stat } from "#app/enums/stat";
+import { Stat } from "#enums/stat";
-import { StatusEffect } from "#app/enums/status-effect";
+import { StatusEffect } from "#enums/status-effect";
 import type { PlayerPokemon, EnemyPokemon } from "#app/field/pokemon";
 import type Pokemon from "#app/field/pokemon";
 import i18next from "i18next";
-import * as Utils from "#app/utils";
+import { NumberHolder } from "#app/utils";
 import { BattleEndPhase } from "./battle-end-phase";
 import { NewBattlePhase } from "./new-battle-phase";
 import { PokemonPhase } from "./pokemon-phase";
@@ -22,7 +22,7 @@ export class AttemptRunPhase extends PokemonPhase {
 
     const playerPokemon = this.getPokemon();
 
-    const escapeChance = new Utils.NumberHolder(0);
+    const escapeChance = new NumberHolder(0);
 
     this.attemptRunAway(playerField, enemyField, escapeChance);
 
@@ -63,7 +63,7 @@ export class AttemptRunPhase extends PokemonPhase {
     this.end();
   }
 
-  attemptRunAway(playerField: PlayerPokemon[], enemyField: EnemyPokemon[], escapeChance: Utils.NumberHolder) {
+  attemptRunAway(playerField: PlayerPokemon[], enemyField: EnemyPokemon[], escapeChance: NumberHolder) {
     /** Sum of the speed of all enemy pokemon on the field */
     const enemySpeed = enemyField.reduce(
       (total: number, enemyPokemon: Pokemon) => total + enemyPokemon.getStat(Stat.SPD),

src/phases/battle-end-phase.ts

@@ -26,13 +26,15 @@ export class BattleEndPhase extends BattlePhase {
       return true;
     });
     // `phaseQueuePrepend` is private, so we have to use this inefficient loop.
-    while (globalScene.tryRemoveUnshiftedPhase(phase => {
+    while (
-      if (phase instanceof BattleEndPhase) {
+      globalScene.tryRemoveUnshiftedPhase(phase => {
-        this.isVictory ||= phase.isVictory;
+        if (phase instanceof BattleEndPhase) {
-        return true;
+          this.isVictory ||= phase.isVictory;
-      }
+          return true;
-      return false;
+        }
-    })) {}
+        return false;
+      })
+    ) {}
 
     globalScene.gameData.gameStats.battles++;
     if (

src/phases/battle-phase.ts

@@ -3,13 +3,13 @@ import { TrainerSlot } from "#enums/trainer-slot";
 import { Phase } from "#app/phase";
 
 export class BattlePhase extends Phase {
-  constructor() {
-    super();
-  }
-
   showEnemyTrainer(trainerSlot: TrainerSlot = TrainerSlot.NONE): void {
-    const sprites = globalScene.currentBattle.trainer?.getSprites()!; // TODO: is this bang correct?
+    if (!globalScene.currentBattle.trainer) {
-    const tintSprites = globalScene.currentBattle.trainer?.getTintSprites()!; // TODO: is this bang correct?
+      console.warn("Enemy trainer is missing!");
+      return;
+    }
+    const sprites = globalScene.currentBattle.trainer.getSprites();
+    const tintSprites = globalScene.currentBattle.trainer.getTintSprites();
     for (let i = 0; i < sprites.length; i++) {
       const visible = !trainerSlot || !i === (trainerSlot === TrainerSlot.TRAINER) || sprites.length < 2;
       [sprites[i], tintSprites[i]].map(sprite => {

src/phases/berry-phase.ts

@@ -4,7 +4,7 @@ import { BerryUsedEvent } from "#app/events/battle-scene";
 import { getPokemonNameWithAffix } from "#app/messages";
 import { BerryModifier } from "#app/modifier/modifier";
 import i18next from "i18next";
-import * as Utils from "#app/utils";
+import { BooleanHolder } from "#app/utils";
 import { FieldPhase } from "./field-phase";
 import { CommonAnimPhase } from "./common-anim-phase";
 import { globalScene } from "#app/global-scene";
@@ -20,7 +20,7 @@ export class BerryPhase extends FieldPhase {
       }, pokemon.isPlayer());
 
       if (hasUsableBerry) {
-        const cancelled = new Utils.BooleanHolder(false);
+        const cancelled = new BooleanHolder(false);
         pokemon.getOpponents().map(opp => applyAbAttrs(PreventBerryUseAbAttr, opp, cancelled));
 
         if (cancelled.value) {
@@ -44,7 +44,7 @@ export class BerryPhase extends FieldPhase {
 
           globalScene.updateModifiers(pokemon.isPlayer());
 
-          applyAbAttrs(HealFromBerryUseAbAttr, pokemon, new Utils.BooleanHolder(false));
+          applyAbAttrs(HealFromBerryUseAbAttr, pokemon, new BooleanHolder(false));
         }
       }
     });

src/phases/common-anim-phase.ts

@@ -6,13 +6,18 @@ import { PokemonPhase } from "./pokemon-phase";
 
 export class CommonAnimPhase extends PokemonPhase {
   private anim: CommonAnim | null;
-  private targetIndex: number | undefined;
+  private targetIndex?: BattlerIndex;
   private playOnEmptyField: boolean;
 
-  constructor(battlerIndex?: BattlerIndex, targetIndex?: BattlerIndex, anim?: CommonAnim, playOnEmptyField = false) {
+  constructor(
+    battlerIndex?: BattlerIndex,
+    targetIndex?: BattlerIndex,
+    anim: CommonAnim | null = null,
+    playOnEmptyField = false,
+  ) {
     super(battlerIndex);
 
-    this.anim = anim!; // TODO: is this bang correct?
+    this.anim = anim;
     this.targetIndex = targetIndex;
     this.playOnEmptyField = playOnEmptyField;
   }

src/phases/damage-anim-phase.ts

@@ -10,11 +10,16 @@ export class DamageAnimPhase extends PokemonPhase {
   private damageResult: DamageResult;
   private critical: boolean;
 
-  constructor(battlerIndex: BattlerIndex, amount: number, damageResult?: DamageResult, critical = false) {
+  constructor(
+    battlerIndex: BattlerIndex,
+    amount: number,
+    damageResult: DamageResult = HitResult.EFFECTIVE,
+    critical = false,
+  ) {
     super(battlerIndex);
 
     this.amount = amount;
-    this.damageResult = damageResult || HitResult.EFFECTIVE;
+    this.damageResult = damageResult;
     this.critical = critical;
   }
 

src/phases/egg-hatch-phase.ts

@@ -11,7 +11,7 @@ import PokemonInfoContainer from "#app/ui/pokemon-info-container";
 import { Mode } from "#app/ui/ui";
 import i18next from "i18next";
 import SoundFade from "phaser3-rex-plugins/plugins/soundfade";
-import * as Utils from "#app/utils";
+import { fixedInt, getFrameMs, randInt } from "#app/utils";
 import type { EggLapsePhase } from "./egg-lapse-phase";
 import type { EggHatchData } from "#app/data/egg-hatch-data";
 import { doShinySparkleAnim } from "#app/field/anims";
@@ -306,17 +306,17 @@ export class EggHatchPhase extends Phase {
     this.canSkip = false;
     this.hatched = true;
     if (this.evolutionBgm) {
-      SoundFade.fadeOut(globalScene, this.evolutionBgm, Utils.fixedInt(100));
+      SoundFade.fadeOut(globalScene, this.evolutionBgm, fixedInt(100));
     }
     for (let e = 0; e < 5; e++) {
-      globalScene.time.delayedCall(Utils.fixedInt(375 * e), () =>
+      globalScene.time.delayedCall(fixedInt(375 * e), () =>
         globalScene.playSound("se/egg_hatch", { volume: 1 - e * 0.2 }),
       );
     }
     this.eggLightraysOverlay.setVisible(true);
     this.eggLightraysOverlay.play("egg_lightrays");
     globalScene.tweens.add({
-      duration: Utils.fixedInt(125),
+      duration: fixedInt(125),
       targets: this.eggHatchOverlay,
       alpha: 1,
       ease: "Cubic.easeIn",
@@ -325,7 +325,7 @@ export class EggHatchPhase extends Phase {
         this.canSkip = true;
       },
     });
-    globalScene.time.delayedCall(Utils.fixedInt(1500), () => {
+    globalScene.time.delayedCall(fixedInt(1500), () => {
       this.canSkip = false;
       if (!this.skipped) {
         this.doReveal();
@@ -363,46 +363,43 @@ export class EggHatchPhase extends Phase {
     this.pokemonSprite.setPipelineData("shiny", this.pokemon.shiny);
     this.pokemonSprite.setPipelineData("variant", this.pokemon.variant);
     this.pokemonSprite.setVisible(true);
-    globalScene.time.delayedCall(Utils.fixedInt(250), () => {
+    globalScene.time.delayedCall(fixedInt(250), () => {
       this.eggsToHatchCount--;
       this.eggHatchHandler.eventTarget.dispatchEvent(new EggCountChangedEvent(this.eggsToHatchCount));
       this.pokemon.cry();
       if (isShiny) {
-        globalScene.time.delayedCall(Utils.fixedInt(500), () => {
+        globalScene.time.delayedCall(fixedInt(500), () => {
           doShinySparkleAnim(this.pokemonShinySparkle, this.pokemon.variant);
         });
       }
-      globalScene.time.delayedCall(
+      globalScene.time.delayedCall(fixedInt(!this.skipped ? (!isShiny ? 1250 : 1750) : !isShiny ? 250 : 750), () => {
-        Utils.fixedInt(!this.skipped ? (!isShiny ? 1250 : 1750) : !isShiny ? 250 : 750),
+        this.infoContainer.show(this.pokemon, false, this.skipped ? 2 : 1);
-        () => {
-          this.infoContainer.show(this.pokemon, false, this.skipped ? 2 : 1);
 
-          globalScene.playSoundWithoutBgm("evolution_fanfare");
+        globalScene.playSoundWithoutBgm("evolution_fanfare");
 
-          globalScene.ui.showText(
+        globalScene.ui.showText(
-            i18next.t("egg:hatchFromTheEgg", {
+          i18next.t("egg:hatchFromTheEgg", {
-              pokemonName: this.pokemon.species.getExpandedSpeciesName(),
+            pokemonName: this.pokemon.species.getExpandedSpeciesName(),
-            }),
+          }),
-            null,
+          null,
-            () => {
+          () => {
-              globalScene.gameData.updateSpeciesDexIvs(this.pokemon.species.speciesId, this.pokemon.ivs);
+            globalScene.gameData.updateSpeciesDexIvs(this.pokemon.species.speciesId, this.pokemon.ivs);
-              globalScene.gameData.setPokemonCaught(this.pokemon, true, true).then(() => {
+            globalScene.gameData.setPokemonCaught(this.pokemon, true, true).then(() => {
-                globalScene.gameData.setEggMoveUnlocked(this.pokemon.species, this.eggMoveIndex).then(value => {
+              globalScene.gameData.setEggMoveUnlocked(this.pokemon.species, this.eggMoveIndex).then(value => {
-                  this.eggHatchData.setEggMoveUnlocked(value);
+                this.eggHatchData.setEggMoveUnlocked(value);
-                  globalScene.ui.showText("", 0);
+                globalScene.ui.showText("", 0);
-                  this.end();
+                this.end();
-                });
               });
-            },
+            });
-            null,
+          },
-            true,
+          null,
-            3000,
+          true,
-          );
+          3000,
-        },
+        );
-      );
+      });
     });
     globalScene.tweens.add({
-      duration: Utils.fixedInt(this.skipped ? 500 : 3000),
+      duration: fixedInt(this.skipped ? 500 : 3000),
       targets: this.eggHatchOverlay,
       alpha: 0,
       ease: "Cubic.easeOut",
@@ -427,9 +424,9 @@ export class EggHatchPhase extends Phase {
   doSpray(intensity: number, offsetY?: number) {
     globalScene.tweens.addCounter({
       repeat: intensity,
-      duration: Utils.getFrameMs(1),
+      duration: getFrameMs(1),
       onRepeat: () => {
-        this.doSprayParticle(Utils.randInt(8), offsetY || 0);
+        this.doSprayParticle(randInt(8), offsetY || 0);
       },
     });
   }
@@ -448,12 +445,12 @@ export class EggHatchPhase extends Phase {
 
     let f = 0;
     let yOffset = 0;
-    const speed = 3 - Utils.randInt(8);
+    const speed = 3 - randInt(8);
-    const amp = 24 + Utils.randInt(32);
+    const amp = 24 + randInt(32);
 
     const particleTimer = globalScene.tweens.addCounter({
       repeat: -1,
-      duration: Utils.getFrameMs(1),
+      duration: getFrameMs(1),
       onRepeat: () => {
         updateParticle();
       },

src/phases/encounter-phase.ts

@@ -43,10 +43,10 @@ import { getNatureName } from "#app/data/nature";
 export class EncounterPhase extends BattlePhase {
   private loaded: boolean;
 
-  constructor(loaded?: boolean) {
+  constructor(loaded = false) {
     super();
 
-    this.loaded = !!loaded;
+    this.loaded = loaded;
   }
 
   start() {

src/phases/evolution-phase.ts

@@ -5,7 +5,7 @@ import { globalScene } from "#app/global-scene";
 import type { SpeciesFormEvolution } from "#app/data/balance/pokemon-evolutions";
 import { FusionSpeciesFormEvolution } from "#app/data/balance/pokemon-evolutions";
 import type EvolutionSceneHandler from "#app/ui/evolution-scene-handler";
-import * as Utils from "#app/utils";
+import { fixedInt, getFrameMs, randInt } from "#app/utils";
 import { Mode } from "#app/ui/ui";
 import { cos, sin } from "#app/field/anims";
 import type { PlayerPokemon } from "#app/field/pokemon";
@@ -332,9 +332,9 @@ export class EvolutionPhase extends Phase {
             () => this.end(),
             null,
             true,
-            Utils.fixedInt(4000),
+            fixedInt(4000),
           );
-          globalScene.time.delayedCall(Utils.fixedInt(4250), () => globalScene.playBgm());
+          globalScene.time.delayedCall(fixedInt(4250), () => globalScene.playBgm());
         });
       });
     };
@@ -392,7 +392,7 @@ export class EvolutionPhase extends Phase {
 
     globalScene.tweens.addCounter({
       repeat: 64,
-      duration: Utils.getFrameMs(1),
+      duration: getFrameMs(1),
       onRepeat: () => {
         if (f < 64) {
           if (!(f & 7)) {
@@ -411,7 +411,7 @@ export class EvolutionPhase extends Phase {
 
     globalScene.tweens.addCounter({
       repeat: 96,
-      duration: Utils.getFrameMs(1),
+      duration: getFrameMs(1),
       onRepeat: () => {
         if (f < 96) {
           if (f < 6) {
@@ -461,7 +461,7 @@ export class EvolutionPhase extends Phase {
 
     globalScene.tweens.addCounter({
       repeat: 48,
-      duration: Utils.getFrameMs(1),
+      duration: getFrameMs(1),
       onRepeat: () => {
         if (!f) {
           for (let i = 0; i < 16; i++) {
@@ -482,14 +482,14 @@ export class EvolutionPhase extends Phase {
 
     globalScene.tweens.addCounter({
       repeat: 48,
-      duration: Utils.getFrameMs(1),
+      duration: getFrameMs(1),
       onRepeat: () => {
         if (!f) {
           for (let i = 0; i < 8; i++) {
             this.doSprayParticle(i);
           }
         } else if (f < 50) {
-          this.doSprayParticle(Utils.randInt(8));
+          this.doSprayParticle(randInt(8));
         }
         f++;
       },
@@ -506,7 +506,7 @@ export class EvolutionPhase extends Phase {
 
     const particleTimer = globalScene.tweens.addCounter({
       repeat: -1,
-      duration: Utils.getFrameMs(1),
+      duration: getFrameMs(1),
       onRepeat: () => {
         updateParticle();
       },
@@ -543,7 +543,7 @@ export class EvolutionPhase extends Phase {
 
     const particleTimer = globalScene.tweens.addCounter({
       repeat: -1,
-      duration: Utils.getFrameMs(1),
+      duration: getFrameMs(1),
       onRepeat: () => {
         updateParticle();
       },
@@ -575,7 +575,7 @@ export class EvolutionPhase extends Phase {
 
     const particleTimer = globalScene.tweens.addCounter({
       repeat: -1,
-      duration: Utils.getFrameMs(1),
+      duration: getFrameMs(1),
       onRepeat: () => {
         updateParticle();
       },
@@ -605,12 +605,12 @@ export class EvolutionPhase extends Phase {
 
     let f = 0;
     let yOffset = 0;
-    const speed = 3 - Utils.randInt(8);
+    const speed = 3 - randInt(8);
-    const amp = 48 + Utils.randInt(64);
+    const amp = 48 + randInt(64);
 
     const particleTimer = globalScene.tweens.addCounter({
       repeat: -1,
-      duration: Utils.getFrameMs(1),
+      duration: getFrameMs(1),
       onRepeat: () => {
         updateParticle();
       },

src/phases/exp-phase.ts

@@ -2,7 +2,7 @@ import { globalScene } from "#app/global-scene";
 import { getPokemonNameWithAffix } from "#app/messages";
 import { ExpBoosterModifier } from "#app/modifier/modifier";
 import i18next from "i18next";
-import * as Utils from "#app/utils";
+import { NumberHolder } from "#app/utils";
 import { PlayerPartyMemberPokemonPhase } from "./player-party-member-pokemon-phase";
 import { LevelUpPhase } from "./level-up-phase";
 
@@ -19,7 +19,7 @@ export class ExpPhase extends PlayerPartyMemberPokemonPhase {
     super.start();
 
     const pokemon = this.getPokemon();
-    const exp = new Utils.NumberHolder(this.expValue);
+    const exp = new NumberHolder(this.expValue);
     globalScene.applyModifiers(ExpBoosterModifier, true, exp);
     exp.value = Math.floor(exp.value);
     globalScene.ui.showText(

src/phases/form-change-phase.ts

@@ -1,5 +1,5 @@
 import { globalScene } from "#app/global-scene";
-import * as Utils from "../utils";
+import { fixedInt } from "#app/utils";
 import { achvs } from "../system/achv";
 import type { SpeciesFormChange } from "../data/pokemon-forms";
 import { getSpeciesFormChangeMessage } from "../data/pokemon-forms";
@@ -9,7 +9,7 @@ import type PartyUiHandler from "../ui/party-ui-handler";
 import { getPokemonNameWithAffix } from "../messages";
 import { EndEvolutionPhase } from "./end-evolution-phase";
 import { EvolutionPhase } from "./evolution-phase";
-import { BattlerTagType } from "#app/enums/battler-tag-type";
+import { BattlerTagType } from "#enums/battler-tag-type";
 import { SpeciesFormKey } from "#enums/species-form-key";
 
 export class FormChangePhase extends EvolutionPhase {
@@ -151,9 +151,9 @@ export class FormChangePhase extends EvolutionPhase {
                                             () => this.end(),
                                             null,
                                             true,
-                                            Utils.fixedInt(delay),
+                                            fixedInt(delay),
                                           );
-                                          globalScene.time.delayedCall(Utils.fixedInt(delay + 250), () =>
+                                          globalScene.time.delayedCall(fixedInt(delay + 250), () =>
                                             globalScene.playBgm(),
                                           );
                                         });

src/phases/game-over-phase.ts

@@ -20,7 +20,7 @@ import { UnlockPhase } from "#app/phases/unlock-phase";
 import { achvs, ChallengeAchv } from "#app/system/achv";
 import { Unlockables } from "#app/system/unlockables";
 import { Mode } from "#app/ui/ui";
-import * as Utils from "#app/utils";
+import { isLocal, isLocalServerConnected } from "#app/utils";
 import { PlayerGender } from "#enums/player-gender";
 import { TrainerType } from "#enums/trainer-type";
 import i18next from "i18next";
@@ -219,7 +219,7 @@ export class GameOverPhase extends BattlePhase {
     /* Added a local check to see if the game is running offline
       If Online, execute apiFetch as intended
       If Offline, execute offlineNewClear() only for victory, a localStorage implementation of newClear daily run checks */
-    if (!Utils.isLocal || Utils.isLocalServerConnected) {
+    if (!isLocal || isLocalServerConnected) {
       pokerogueApi.savedata.session
         .newclear({
           slot: globalScene.sessionSlotId,

src/phases/login-phase.ts

@@ -5,26 +5,26 @@ import { Phase } from "#app/phase";
 import { handleTutorial, Tutorial } from "#app/tutorial";
 import { Mode } from "#app/ui/ui";
 import i18next, { t } from "i18next";
-import * as Utils from "#app/utils";
+import { getCookie, sessionIdKey, executeIf, removeCookie } from "#app/utils";
 import { SelectGenderPhase } from "./select-gender-phase";
 import { UnavailablePhase } from "./unavailable-phase";
 
 export class LoginPhase extends Phase {
   private showText: boolean;
 
-  constructor(showText?: boolean) {
+  constructor(showText = true) {
     super();
 
-    this.showText = showText === undefined || !!showText;
+    this.showText = showText;
   }
 
   start(): void {
     super.start();
 
-    const hasSession = !!Utils.getCookie(Utils.sessionIdKey);
+    const hasSession = !!getCookie(sessionIdKey);
 
     globalScene.ui.setMode(Mode.LOADING, { buttonActions: [] });
-    Utils.executeIf(bypassLogin || hasSession, updateUserInfo).then(response => {
+    executeIf(bypassLogin || hasSession, updateUserInfo).then(response => {
       const success = response ? response[0] : false;
       const statusCode = response ? response[1] : null;
       if (!success) {
@@ -38,7 +38,7 @@ export class LoginPhase extends Phase {
           const loadData = () => {
             updateUserInfo().then(success => {
               if (!success[0]) {
-                Utils.removeCookie(Utils.sessionIdKey);
+                removeCookie(sessionIdKey);
                 globalScene.reset(true, true);
                 return;
               }
@@ -60,7 +60,7 @@ export class LoginPhase extends Phase {
                       globalScene.ui.playSelect();
                       updateUserInfo().then(success => {
                         if (!success[0]) {
-                          Utils.removeCookie(Utils.sessionIdKey);
+                          removeCookie(sessionIdKey);
                           globalScene.reset(true, true);
                           return;
                         }
@@ -89,7 +89,7 @@ export class LoginPhase extends Phase {
             ],
           });
         } else if (statusCode === 401) {
-          Utils.removeCookie(Utils.sessionIdKey);
+          removeCookie(sessionIdKey);
           globalScene.reset(true, true);
         } else {
           globalScene.unshiftPhase(new UnavailablePhase());

src/phases/message-phase.ts

@@ -3,9 +3,9 @@ import { Phase } from "#app/phase";
 
 export class MessagePhase extends Phase {
   private text: string;
-  private callbackDelay: number | null;
+  private callbackDelay?: number | null;
-  private prompt: boolean | null;
+  private prompt?: boolean | null;
-  private promptDelay: number | null;
+  private promptDelay?: number | null;
   private speaker?: string;
 
   constructor(
@@ -18,9 +18,9 @@ export class MessagePhase extends Phase {
     super();
 
     this.text = text;
-    this.callbackDelay = callbackDelay!; // TODO: is this bang correct?
+    this.callbackDelay = callbackDelay;
-    this.prompt = prompt!; // TODO: is this bang correct?
+    this.prompt = prompt;
-    this.promptDelay = promptDelay!; // TODO: is this bang correct?
+    this.promptDelay = promptDelay;
     this.speaker = speaker;
   }
 

src/phases/money-reward-phase.ts

@@ -2,7 +2,7 @@ import { globalScene } from "#app/global-scene";
 import { ArenaTagType } from "#app/enums/arena-tag-type";
 import { MoneyMultiplierModifier } from "#app/modifier/modifier";
 import i18next from "i18next";
-import * as Utils from "#app/utils";
+import { NumberHolder } from "#app/utils";
 import { BattlePhase } from "./battle-phase";
 
 export class MoneyRewardPhase extends BattlePhase {
@@ -15,7 +15,7 @@ export class MoneyRewardPhase extends BattlePhase {
   }
 
   start() {
-    const moneyAmount = new Utils.NumberHolder(globalScene.getWaveMoneyAmount(this.moneyMultiplier));
+    const moneyAmount = new NumberHolder(globalScene.getWaveMoneyAmount(this.moneyMultiplier));
 
     globalScene.applyModifiers(MoneyMultiplierModifier, true, moneyAmount);
 

src/phases/move-anim-test-phase.ts

@@ -1,50 +0,0 @@
-import { globalScene } from "#app/global-scene";
-import { initMoveAnim, loadMoveAnimAssets, MoveAnim } from "#app/data/battle-anims";
-import { allMoves, SelfStatusMove } from "#app/data/moves/move";
-import { Moves } from "#app/enums/moves";
-import * as Utils from "#app/utils";
-import { BattlePhase } from "./battle-phase";
-
-export class MoveAnimTestPhase extends BattlePhase {
-  private moveQueue: Moves[];
-
-  constructor(moveQueue?: Moves[]) {
-    super();
-
-    this.moveQueue = moveQueue || Utils.getEnumValues(Moves).slice(1);
-  }
-
-  start() {
-    const moveQueue = this.moveQueue.slice(0);
-    this.playMoveAnim(moveQueue, true);
-  }
-
-  playMoveAnim(moveQueue: Moves[], player: boolean) {
-    const moveId = player ? moveQueue[0] : moveQueue.shift();
-    if (moveId === undefined) {
-      this.playMoveAnim(this.moveQueue.slice(0), true);
-      return;
-    }
-    if (player) {
-      console.log(Moves[moveId]);
-    }
-
-    initMoveAnim(moveId).then(() => {
-      loadMoveAnimAssets([moveId], true).then(() => {
-        const user = player ? globalScene.getPlayerPokemon()! : globalScene.getEnemyPokemon()!;
-        const target =
-          player !== allMoves[moveId] instanceof SelfStatusMove
-            ? globalScene.getEnemyPokemon()!
-            : globalScene.getPlayerPokemon()!;
-        new MoveAnim(moveId, user, target.getBattlerIndex()).play(allMoves[moveId].hitsSubstitute(user, target), () => {
-          // TODO: are the bangs correct here?
-          if (player) {
-            this.playMoveAnim(moveQueue, false);
-          } else {
-            this.playMoveAnim(moveQueue, true);
-          }
-        });
-      });
-    });
-  }
-}

src/phases/move-effect-phase.ts

@@ -26,6 +26,7 @@ import {
 } from "#app/data/battler-tags";
 import type { MoveAttr } from "#app/data/moves/move";
 import {
+  AddArenaTrapTagAttr,
   applyFilteredMoveAttrs,
   applyMoveAttrs,
   AttackMove,
@@ -209,12 +210,12 @@ export class MoveEffectPhase extends PokemonPhase {
       targets.some(t => t.hasAbilityWithAttr(ReflectStatusMoveAbAttr) || !!t.getTag(BattlerTagType.MAGIC_COAT));
 
     /**
-     * If no targets are left for the move to hit (FAIL), or the invoked move is non-reflectable, single-target
+     * If no targets are left for the move to hit and it is not a hazard move (FAIL), or the invoked move is non-reflectable, single-target
      * (and not random target) and failed the hit check against its target (MISS), log the move
      * as FAILed or MISSed (depending on the conditions above) and end this phase.
      */
     if (
-      !hasActiveTargets ||
+      (!hasActiveTargets && !move.hasAttr(AddArenaTrapTagAttr)) ||
       (!mayBounce &&
         !move.hasAttr(VariableTargetAttr) &&
         !move.isMultiTarget() &&
@@ -239,18 +240,28 @@ export class MoveEffectPhase extends PokemonPhase {
       return this.end();
     }
 
-    const playOnEmptyField = globalScene.currentBattle?.mysteryEncounter?.hasBattleAnimationsWithoutTargets ?? false;
+    const playOnEmptyField =
-    // Move animation only needs one target
+      (globalScene.currentBattle?.mysteryEncounter?.hasBattleAnimationsWithoutTargets ?? false) ||
-    new MoveAnim(move.id as Moves, user, this.getFirstTarget()!.getBattlerIndex(), playOnEmptyField).play(
+      (!hasActiveTargets && move.hasAttr(AddArenaTrapTagAttr));
-      move.hitsSubstitute(user, this.getFirstTarget()!),
+    // Move animation only needs one target. The attacker is used as a fallback.
-      () => {
+    new MoveAnim(
-        /** Has the move successfully hit a target (for damage) yet? */
+      move.id as Moves,
-        let hasHit = false;
+      user,
+      this.getFirstTarget()?.getBattlerIndex() ?? BattlerIndex.ATTACKER,
+      playOnEmptyField,
+    ).play(move.hitsSubstitute(user, this.getFirstTarget()!), () => {
+      /** Has the move successfully hit a target (for damage) yet? */
+      let hasHit = false;
 
-        // Prevent ENEMY_SIDE targeted moves from occurring twice in double battles
+      // Prevent ENEMY_SIDE targeted moves from occurring twice in double battles
-        // and check which target will magic bounce.
+      // and check which target will magic bounce.
-        const trueTargets: Pokemon[] =
+      // In the event that the move is a hazard move, there may be no target and the move should still succeed.
-          move.moveTarget !== MoveTarget.ENEMY_SIDE
+      // In this case, the user is used as the "target" to prevent a crash.
+      // This should not affect normal execution of the move otherwise.
+      const trueTargets: Pokemon[] =
+        !hasActiveTargets && move.hasAttr(AddArenaTrapTagAttr)
+          ? [user]
+          : move.moveTarget !== MoveTarget.ENEMY_SIDE
             ? targets
             : (() => {
                 const magicCoatTargets = targets.filter(
@@ -264,62 +275,63 @@ export class MoveEffectPhase extends PokemonPhase {
                 return [magicCoatTargets[0]];
               })();
 
-        const queuedPhases: Phase[] = [];
+      const queuedPhases: Phase[] = [];
-        for (const target of trueTargets) {
+      for (const target of trueTargets) {
-          /** The {@linkcode ArenaTagSide} to which the target belongs */
+        /** The {@linkcode ArenaTagSide} to which the target belongs */
-          const targetSide = target.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
+        const targetSide = target.isPlayer() ? ArenaTagSide.PLAYER : ArenaTagSide.ENEMY;
-          /** Has the invoked move been cancelled by conditional protection (e.g Quick Guard)? */
+        /** Has the invoked move been cancelled by conditional protection (e.g Quick Guard)? */
-          const hasConditionalProtectApplied = new BooleanHolder(false);
+        const hasConditionalProtectApplied = new BooleanHolder(false);
-          /** Does the applied conditional protection bypass Protect-ignoring effects? */
+        /** Does the applied conditional protection bypass Protect-ignoring effects? */
-          const bypassIgnoreProtect = new BooleanHolder(false);
+        const bypassIgnoreProtect = new BooleanHolder(false);
-          /** If the move is not targeting a Pokemon on the user's side, try to apply conditional protection effects */
+        /** If the move is not targeting a Pokemon on the user's side, try to apply conditional protection effects */
-          if (!this.move.getMove().isAllyTarget()) {
+        if (!this.move.getMove().isAllyTarget()) {
-            globalScene.arena.applyTagsForSide(
+          globalScene.arena.applyTagsForSide(
-              ConditionalProtectTag,
+            ConditionalProtectTag,
-              targetSide,
+            targetSide,
-              false,
+            false,
-              hasConditionalProtectApplied,
+            hasConditionalProtectApplied,
-              user,
+            user,
-              target,
+            target,
-              move.id,
+            move.id,
-              bypassIgnoreProtect,
+            bypassIgnoreProtect,
-            );
+          );
-          }
+        }
 
           /** Is the target protected by Protect, etc. or a relevant conditional protection effect? */
           const isProtected =
             ![MoveTarget.ENEMY_SIDE, MoveTarget.BOTH_SIDES].includes(this.move.getMove().moveTarget) &&
-            (bypassIgnoreProtect.value || !this.move.getMove().checkFlag(MoveFlags.IGNORE_PROTECT, user, target)) &&
+            (bypassIgnoreProtect.value ||
+              !this.move.getMove().doesFlagEffectApply({ flag: MoveFlags.IGNORE_PROTECT, user, target })) &&
             (hasConditionalProtectApplied.value ||
               (!target.findTags(t => t instanceof DamageProtectedTag).length &&
                 target.findTags(t => t instanceof ProtectedTag).find(t => target.lapseTag(t.tagType))) ||
               (this.move.getMove().category !== MoveCategory.STATUS &&
                 target.findTags(t => t instanceof DamageProtectedTag).find(t => target.lapseTag(t.tagType))));
 
-          /** Is the target hidden by the effects of its Commander ability? */
+        /** Is the target hidden by the effects of its Commander ability? */
-          const isCommanding =
+        const isCommanding =
-            globalScene.currentBattle.double &&
+          globalScene.currentBattle.double &&
-            target.getAlly()?.getTag(BattlerTagType.COMMANDED)?.getSourcePokemon() === target;
+          target.getAlly()?.getTag(BattlerTagType.COMMANDED)?.getSourcePokemon() === target;
 
-          /** Is the target reflecting status moves from the magic coat move? */
+        /** Is the target reflecting status moves from the magic coat move? */
-          const isReflecting = !!target.getTag(BattlerTagType.MAGIC_COAT);
+        const isReflecting = !!target.getTag(BattlerTagType.MAGIC_COAT);
 
           /** Is the target's magic bounce ability not ignored and able to reflect this move? */
           const canMagicBounce =
             !isReflecting &&
-            !move.checkFlag(MoveFlags.IGNORE_ABILITIES, user, target) &&
+            !move.doesFlagEffectApply({ flag: MoveFlags.IGNORE_ABILITIES, user, target }) &&
             target.hasAbilityWithAttr(ReflectStatusMoveAbAttr);
 
-          const semiInvulnerableTag = target.getTag(SemiInvulnerableTag);
+        const semiInvulnerableTag = target.getTag(SemiInvulnerableTag);
 
-          /** Is the target reflecting the effect, not protected, and not in an semi-invulnerable state?*/
+        /** Is the target reflecting the effect, not protected, and not in an semi-invulnerable state?*/
-          const willBounce =
+        const willBounce =
-            !isProtected &&
+          !isProtected &&
-            !this.reflected &&
+          !this.reflected &&
-            !isCommanding &&
+          !isCommanding &&
-            move.hasFlag(MoveFlags.REFLECTABLE) &&
+          move.hasFlag(MoveFlags.REFLECTABLE) &&
-            (isReflecting || canMagicBounce) &&
+          (isReflecting || canMagicBounce) &&
-            !semiInvulnerableTag;
+          !semiInvulnerableTag;
 
           // If the move will bounce, then queue the bounce and move on to the next target
           if (!target.switchOutStatus && willBounce) {
@@ -337,171 +349,171 @@ export class MoveEffectPhase extends PokemonPhase {
               queuedPhases.push(new HideAbilityPhase());
             }
 
-            queuedPhases.push(
+          queuedPhases.push(new MovePhase(target, newTargets, new PokemonMove(move.id, 0, 0, true), true, true, true));
-              new MovePhase(target, newTargets, new PokemonMove(move.id, 0, 0, true), true, true, true),
+          continue;
+        }
+
+        /** Is the pokemon immune due to an ablility, and also not in a semi invulnerable state?  */
+        const isImmune =
+          target.hasAbilityWithAttr(TypeImmunityAbAttr) &&
+          target.getAbility()?.getAttrs(TypeImmunityAbAttr)?.[0]?.getImmuneType() === user.getMoveType(move) &&
+          !semiInvulnerableTag;
+
+        /**
+         * If the move missed a target, stop all future hits against that target
+         * and move on to the next target (if there is one).
+         */
+        if (
+          target.switchOutStatus ||
+          isCommanding ||
+          (!isImmune &&
+            !isProtected &&
+            !targetHitChecks[target.getBattlerIndex()] &&
+            !move.hasAttr(AddArenaTrapTagAttr))
+        ) {
+          this.stopMultiHit(target);
+          if (!target.switchOutStatus) {
+            globalScene.queueMessage(
+              i18next.t("battle:attackMissed", {
+                pokemonNameWithAffix: getPokemonNameWithAffix(target),
+              }),
             );
-            continue;
           }
-
+          if (moveHistoryEntry.result === MoveResult.PENDING) {
-          /** Is the pokemon immune due to an ablility, and also not in a semi invulnerable state?  */
+            moveHistoryEntry.result = MoveResult.MISS;
-          const isImmune =
-            target.hasAbilityWithAttr(TypeImmunityAbAttr) &&
-            target.getAbility()?.getAttrs(TypeImmunityAbAttr)?.[0]?.getImmuneType() === user.getMoveType(move) &&
-            !semiInvulnerableTag;
-
-          /**
-           * If the move missed a target, stop all future hits against that target
-           * and move on to the next target (if there is one).
-           */
-          if (
-            target.switchOutStatus ||
-            isCommanding ||
-            (!isImmune && !isProtected && !targetHitChecks[target.getBattlerIndex()])
-          ) {
-            this.stopMultiHit(target);
-            if (!target.switchOutStatus) {
-              globalScene.queueMessage(
-                i18next.t("battle:attackMissed", {
-                  pokemonNameWithAffix: getPokemonNameWithAffix(target),
-                }),
-              );
-            }
-            if (moveHistoryEntry.result === MoveResult.PENDING) {
-              moveHistoryEntry.result = MoveResult.MISS;
-            }
-            user.pushMoveHistory(moveHistoryEntry);
-            applyMoveAttrs(MissEffectAttr, user, null, move);
-            continue;
-          }
-
-          /** Does this phase represent the invoked move's first strike? */
-          const firstHit = user.turnData.hitsLeft === user.turnData.hitCount;
-
-          // Only log the move's result on the first strike
-          if (firstHit) {
-            user.pushMoveHistory(moveHistoryEntry);
-          }
-
-          /**
-           * Since all fail/miss checks have applied, the move is considered successfully applied.
-           * It's worth noting that if the move has no effect or is protected against, this assignment
-           * is overwritten and the move is logged as a FAIL.
-           */
-          moveHistoryEntry.result = MoveResult.SUCCESS;
-
-          /**
-           * Stores the result of applying the invoked move to the target.
-           * If the target is protected, the result is always `NO_EFFECT`.
-           * Otherwise, the hit result is based on type effectiveness, immunities,
-           * and other factors that may negate the attack or status application.
-           *
-           * Internally, the call to {@linkcode Pokemon.apply} is where damage is calculated
-           * (for attack moves) and the target's HP is updated. However, this isn't
-           * made visible to the user until the resulting {@linkcode DamagePhase}
-           * is invoked.
-           */
-          const hitResult = !isProtected ? target.apply(user, move) : HitResult.NO_EFFECT;
-
-          /** Does {@linkcode hitResult} indicate that damage was dealt to the target? */
-          const dealsDamage = [
-            HitResult.EFFECTIVE,
-            HitResult.SUPER_EFFECTIVE,
-            HitResult.NOT_VERY_EFFECTIVE,
-            HitResult.ONE_HIT_KO,
-          ].includes(hitResult);
-
-          /** Is this target the first one hit by the move on its current strike? */
-          const firstTarget = dealsDamage && !hasHit;
-          if (firstTarget) {
-            hasHit = true;
-          }
-
-          /**
-           * If the move has no effect on the target (i.e. the target is protected or immune),
-           * change the logged move result to FAIL.
-           */
-          if (hitResult === HitResult.NO_EFFECT) {
-            moveHistoryEntry.result = MoveResult.FAIL;
-          }
-
-          /** Does this phase represent the invoked move's last strike? */
-          const lastHit = user.turnData.hitsLeft === 1 || !this.getFirstTarget()?.isActive();
-
-          /**
-           * If the user can change forms by using the invoked move,
-           * it only changes forms after the move's last hit
-           * (see Relic Song's interaction with Parental Bond when used by Meloetta).
-           */
-          if (lastHit) {
-            globalScene.triggerPokemonFormChange(user, SpeciesFormChangePostMoveTrigger);
-            /**
-             * Multi-Lens, Multi Hit move and Parental Bond check for PostDamageAbAttr
-             * other damage source are calculated in damageAndUpdate in pokemon.ts
-             */
-            if (user.turnData.hitCount > 1) {
-              applyPostDamageAbAttrs(PostDamageAbAttr, target, 0, target.hasPassive(), false, [], user);
-            }
-          }
-
-          applyFilteredMoveAttrs(
-            (attr: MoveAttr) =>
-              attr instanceof MoveEffectAttr &&
-              attr.trigger === MoveEffectTrigger.PRE_APPLY &&
-              (!attr.firstHitOnly || firstHit) &&
-              (!attr.lastHitOnly || lastHit) &&
-              hitResult !== HitResult.NO_EFFECT,
-            user,
-            target,
-            move,
-          );
-
-          if (hitResult !== HitResult.FAIL) {
-            this.applySelfTargetEffects(user, target, firstHit, lastHit);
-
-            if (hitResult !== HitResult.NO_EFFECT) {
-              this.applyPostApplyEffects(user, target, firstHit, lastHit);
-              this.applyHeldItemFlinchCheck(user, target, dealsDamage);
-              this.applySuccessfulAttackEffects(user, target, firstHit, lastHit, !!isProtected, hitResult, firstTarget);
-            } else {
-              applyMoveAttrs(NoEffectAttr, user, null, move);
-            }
           }
+          user.pushMoveHistory(moveHistoryEntry);
+          applyMoveAttrs(MissEffectAttr, user, null, move);
+          continue;
         }
 
-        // Apply queued phases
+        /** Does this phase represent the invoked move's first strike? */
-        if (queuedPhases.length) {
+        const firstHit = user.turnData.hitsLeft === user.turnData.hitCount;
-          globalScene.appendToPhase(queuedPhases, MoveEndPhase);
+
-        }
+        // Only log the move's result on the first strike
-        // Apply the move's POST_TARGET effects on the move's last hit, after all targeted effects have resolved
+        if (firstHit) {
-        if (user.turnData.hitsLeft === 1 || !this.getFirstTarget()?.isActive()) {
+          user.pushMoveHistory(moveHistoryEntry);
-          applyFilteredMoveAttrs(
-            (attr: MoveAttr) => attr instanceof MoveEffectAttr && attr.trigger === MoveEffectTrigger.POST_TARGET,
-            user,
-            null,
-            move,
-          );
         }
 
         /**
-         * Remove the target's substitute (if it exists and has expired)
+         * Since all fail/miss checks have applied, the move is considered successfully applied.
-         * after all targeted effects have applied.
+         * It's worth noting that if the move has no effect or is protected against, this assignment
-         * This prevents blocked effects from applying until after this hit resolves.
+         * is overwritten and the move is logged as a FAIL.
          */
-        targets.forEach(target => {
+        moveHistoryEntry.result = MoveResult.SUCCESS;
-          const substitute = target.getTag(SubstituteTag);
-          if (substitute && substitute.hp <= 0) {
-            target.lapseTag(BattlerTagType.SUBSTITUTE);
-          }
-        });
 
-        const moveType = user.getMoveType(move, true);
+        /**
-        if (move.category !== MoveCategory.STATUS && !user.stellarTypesBoosted.includes(moveType)) {
+         * Stores the result of applying the invoked move to the target.
-          user.stellarTypesBoosted.push(moveType);
+         * If the target is protected, the result is always `NO_EFFECT`.
+         * Otherwise, the hit result is based on type effectiveness, immunities,
+         * and other factors that may negate the attack or status application.
+         *
+         * Internally, the call to {@linkcode Pokemon.apply} is where damage is calculated
+         * (for attack moves) and the target's HP is updated. However, this isn't
+         * made visible to the user until the resulting {@linkcode DamagePhase}
+         * is invoked.
+         */
+        const hitResult = !isProtected ? target.apply(user, move) : HitResult.NO_EFFECT;
+
+        /** Does {@linkcode hitResult} indicate that damage was dealt to the target? */
+        const dealsDamage = [
+          HitResult.EFFECTIVE,
+          HitResult.SUPER_EFFECTIVE,
+          HitResult.NOT_VERY_EFFECTIVE,
+          HitResult.ONE_HIT_KO,
+        ].includes(hitResult);
+
+        /** Is this target the first one hit by the move on its current strike? */
+        const firstTarget = dealsDamage && !hasHit;
+        if (firstTarget) {
+          hasHit = true;
         }
 
-        this.end();
+        /**
-      },
+         * If the move has no effect on the target (i.e. the target is protected or immune),
-    );
+         * change the logged move result to FAIL.
+         */
+        if (hitResult === HitResult.NO_EFFECT) {
+          moveHistoryEntry.result = MoveResult.FAIL;
+        }
+
+        /** Does this phase represent the invoked move's last strike? */
+        const lastHit = user.turnData.hitsLeft === 1 || !this.getFirstTarget()?.isActive();
+
+        /**
+         * If the user can change forms by using the invoked move,
+         * it only changes forms after the move's last hit
+         * (see Relic Song's interaction with Parental Bond when used by Meloetta).
+         */
+        if (lastHit) {
+          globalScene.triggerPokemonFormChange(user, SpeciesFormChangePostMoveTrigger);
+          /**
+           * Multi-Lens, Multi Hit move and Parental Bond check for PostDamageAbAttr
+           * other damage source are calculated in damageAndUpdate in pokemon.ts
+           */
+          if (user.turnData.hitCount > 1) {
+            applyPostDamageAbAttrs(PostDamageAbAttr, target, 0, target.hasPassive(), false, [], user);
+          }
+        }
+
+        applyFilteredMoveAttrs(
+          (attr: MoveAttr) =>
+            attr instanceof MoveEffectAttr &&
+            attr.trigger === MoveEffectTrigger.PRE_APPLY &&
+            (!attr.firstHitOnly || firstHit) &&
+            (!attr.lastHitOnly || lastHit) &&
+            hitResult !== HitResult.NO_EFFECT,
+          user,
+          target,
+          move,
+        );
+
+        if (hitResult !== HitResult.FAIL) {
+          this.applySelfTargetEffects(user, target, firstHit, lastHit);
+
+          if (hitResult !== HitResult.NO_EFFECT) {
+            this.applyPostApplyEffects(user, target, firstHit, lastHit);
+            this.applyHeldItemFlinchCheck(user, target, dealsDamage);
+            this.applySuccessfulAttackEffects(user, target, firstHit, lastHit, !!isProtected, hitResult, firstTarget);
+          } else {
+            applyMoveAttrs(NoEffectAttr, user, null, move);
+          }
+        }
+      }
+
+      // Apply queued phases
+      if (queuedPhases.length) {
+        globalScene.appendToPhase(queuedPhases, MoveEndPhase);
+      }
+      // Apply the move's POST_TARGET effects on the move's last hit, after all targeted effects have resolved
+      if (user.turnData.hitsLeft === 1 || !this.getFirstTarget()?.isActive()) {
+        applyFilteredMoveAttrs(
+          (attr: MoveAttr) => attr instanceof MoveEffectAttr && attr.trigger === MoveEffectTrigger.POST_TARGET,
+          user,
+          null,
+          move,
+        );
+      }
+
+      /**
+       * Remove the target's substitute (if it exists and has expired)
+       * after all targeted effects have applied.
+       * This prevents blocked effects from applying until after this hit resolves.
+       */
+      targets.forEach(target => {
+        const substitute = target.getTag(SubstituteTag);
+        if (substitute && substitute.hp <= 0) {
+          target.lapseTag(BattlerTagType.SUBSTITUTE);
+        }
+      });
+
+      const moveType = user.getMoveType(move, true);
+      if (move.category !== MoveCategory.STATUS && !user.stellarTypesBoosted.includes(moveType)) {
+        user.stellarTypesBoosted.push(moveType);
+      }
+
+      this.end();
+    });
   }
 
   public override end(): void {

src/phases/move-end-phase.ts

@@ -2,11 +2,18 @@ import { globalScene } from "#app/global-scene";
 import { BattlerTagLapseType } from "#app/data/battler-tags";
 import { PokemonPhase } from "./pokemon-phase";
 import type { BattlerIndex } from "#app/battle";
+import { applyPostSummonAbAttrs, PostSummonRemoveEffectAbAttr } from "#app/data/ability";
+import type Pokemon from "#app/field/pokemon";
 
 export class MoveEndPhase extends PokemonPhase {
   private wasFollowUp: boolean;
-  constructor(battlerIndex: BattlerIndex, wasFollowUp: boolean = false) {
+
+  /** Targets from the preceding MovePhase */
+  private targets: Pokemon[];
+  constructor(battlerIndex: BattlerIndex, targets: Pokemon[], wasFollowUp = false) {
     super(battlerIndex);
+
+    this.targets = targets;
     this.wasFollowUp = wasFollowUp;
   }
 
@@ -17,9 +24,15 @@ export class MoveEndPhase extends PokemonPhase {
     if (!this.wasFollowUp && pokemon?.isActive(true)) {
       pokemon.lapseTags(BattlerTagLapseType.AFTER_MOVE);
     }
-
     globalScene.arena.setIgnoreAbilities(false);
 
+    // Remove effects which were set on a Pokemon which removes them on summon (i.e. via Mold Breaker)
+    for (const target of this.targets) {
+      if (target) {
+        applyPostSummonAbAttrs(PostSummonRemoveEffectAbAttr, target);
+      }
+    }
+
     this.end();
   }
 }

src/phases/move-phase.ts

@@ -15,6 +15,7 @@ import type { DelayedAttackTag } from "#app/data/arena-tag";
 import { CommonAnim } from "#app/data/battle-anims";
 import { BattlerTagLapseType, CenterOfAttentionTag } from "#app/data/battler-tags";
 import {
+  AddArenaTrapTagAttr,
   allMoves,
   applyMoveAttrs,
   BypassRedirectAttr,
@@ -168,7 +169,11 @@ export class MovePhase extends BattlePhase {
 
     // Check move to see if arena.ignoreAbilities should be true.
     if (!this.followUp || this.reflected) {
-      if (this.move.getMove().checkFlag(MoveFlags.IGNORE_ABILITIES, this.pokemon, null)) {
+      if (
+        this.move
+          .getMove()
+          .doesFlagEffectApply({ flag: MoveFlags.IGNORE_ABILITIES, user: this.pokemon, isFollowUp: this.followUp })
+      ) {
         globalScene.arena.setIgnoreAbilities(true, this.pokemon.getBattlerIndex());
       }
     }
@@ -201,7 +206,10 @@ export class MovePhase extends BattlePhase {
     const targets = this.getActiveTargetPokemon();
     const moveQueue = this.pokemon.getMoveQueue();
 
-    if (targets.length === 0 || (moveQueue.length && moveQueue[0].move === Moves.NONE)) {
+    if (
+      (targets.length === 0 && !this.move.getMove().hasAttr(AddArenaTrapTagAttr)) ||
+      (moveQueue.length && moveQueue[0].move === Moves.NONE)
+    ) {
       this.showMoveText();
       this.showFailedText();
       this.cancel();
@@ -227,7 +235,7 @@ export class MovePhase extends BattlePhase {
             (!this.pokemon.randSeedInt(4) || Overrides.STATUS_ACTIVATION_OVERRIDE === true) &&
             Overrides.STATUS_ACTIVATION_OVERRIDE !== false;
           break;
-        case StatusEffect.SLEEP:
+        case StatusEffect.SLEEP: {
           applyMoveAttrs(BypassSleepAttr, this.pokemon, null, this.move.getMove());
           const turnsRemaining = new NumberHolder(this.pokemon.status.sleepTurnsRemaining ?? 0);
           applyAbAttrs(
@@ -242,6 +250,7 @@ export class MovePhase extends BattlePhase {
           healed = this.pokemon.status.sleepTurnsRemaining <= 0;
           activated = !healed && !this.pokemon.getTag(BattlerTagType.BYPASS_SLEEP);
           break;
+        }
         case StatusEffect.FREEZE:
           healed =
             !!this.move
@@ -468,7 +477,9 @@ export class MovePhase extends BattlePhase {
    * Queues a {@linkcode MoveEndPhase} and then ends the phase
    */
   public end(): void {
-    globalScene.unshiftPhase(new MoveEndPhase(this.pokemon.getBattlerIndex(), this.followUp));
+    globalScene.unshiftPhase(
+      new MoveEndPhase(this.pokemon.getBattlerIndex(), this.getActiveTargetPokemon(), this.followUp),
+    );
 
     super.end();
   }

src/phases/mystery-encounter-phases.ts

@@ -26,8 +26,7 @@ import { TrainerSlot } from "#enums/trainer-slot";
 import { IvScannerModifier } from "../modifier/modifier";
 import { Phase } from "../phase";
 import { Mode } from "../ui/ui";
-import * as Utils from "../utils";
+import { isNullOrUndefined, randSeedItem } from "#app/utils";
-import { isNullOrUndefined } from "../utils";
 
 /**
  * Will handle (in order):
@@ -387,7 +386,7 @@ export class MysteryEncounterBattlePhase extends Phase {
         const trainer = globalScene.currentBattle.trainer;
         let message: string;
         globalScene.executeWithSeedOffset(
-          () => (message = Utils.randSeedItem(encounterMessages)),
+          () => (message = randSeedItem(encounterMessages)),
           globalScene.currentBattle.mysteryEncounter?.getSeedOffset(),
         );
         message = message!; // tell TS compiler it's defined now

src/phases/new-biome-encounter-phase.ts

@@ -4,10 +4,6 @@ import { getRandomWeatherType } from "#app/data/weather";
 import { NextEncounterPhase } from "./next-encounter-phase";
 
 export class NewBiomeEncounterPhase extends NextEncounterPhase {
-  constructor() {
-    super();
-  }
-
   doEncounter(): void {
     globalScene.playBgm(undefined, true);
 

src/phases/next-encounter-phase.ts

@@ -2,10 +2,6 @@ import { globalScene } from "#app/global-scene";
 import { EncounterPhase } from "./encounter-phase";
 
 export class NextEncounterPhase extends EncounterPhase {
-  constructor() {
-    super();
-  }
-
   start() {
     super.start();
   }

src/phases/obtain-status-effect-phase.ts

@@ -6,6 +6,9 @@ import { StatusEffect } from "#app/enums/status-effect";
 import type Pokemon from "#app/field/pokemon";
 import { getPokemonNameWithAffix } from "#app/messages";
 import { PokemonPhase } from "./pokemon-phase";
+import { SpeciesFormChangeStatusEffectTrigger } from "#app/data/pokemon-forms";
+import { applyPostSetStatusAbAttrs, PostSetStatusAbAttr } from "#app/data/ability";
+import { isNullOrUndefined } from "#app/utils";
 
 export class ObtainStatusEffectPhase extends PokemonPhase {
   private statusEffect?: StatusEffect;
@@ -44,6 +47,12 @@ export class ObtainStatusEffectPhase extends PokemonPhase {
               this.sourceText ?? undefined,
             ),
           );
+          if (!isNullOrUndefined(this.statusEffect) && this.statusEffect !== StatusEffect.FAINT) {
+            globalScene.triggerPokemonFormChange(pokemon, SpeciesFormChangeStatusEffectTrigger, true);
+            // If mold breaker etc was used to set this status, it shouldn't apply to abilities activated afterwards
+            globalScene.arena.setIgnoreAbilities(false);
+            applyPostSetStatusAbAttrs(PostSetStatusAbAttr, pokemon, this.statusEffect, this.sourcePokemon);
+          }
           this.end();
         });
         return;

src/phases/party-heal-phase.ts

@@ -1,5 +1,5 @@
 import { globalScene } from "#app/global-scene";
-import * as Utils from "#app/utils";
+import { fixedInt } from "#app/utils";
 import { BattlePhase } from "./battle-phase";
 
 export class PartyHealPhase extends BattlePhase {
@@ -28,7 +28,7 @@ export class PartyHealPhase extends BattlePhase {
         pokemon.updateInfo(true);
       }
       const healSong = globalScene.playSoundWithoutBgm("heal");
-      globalScene.time.delayedCall(Utils.fixedInt(healSong.totalDuration * 1000), () => {
+      globalScene.time.delayedCall(fixedInt(healSong.totalDuration * 1000), () => {
         healSong.destroy();
         if (this.resumeBgm && bgmPlaying) {
           globalScene.playBgm();

src/phases/pokemon-anim-phase.ts

@@ -8,18 +8,18 @@ import { Species } from "#enums/species";
 
 export class PokemonAnimPhase extends BattlePhase {
   /** The type of animation to play in this phase */
-  private key: PokemonAnimType;
+  protected key: PokemonAnimType;
   /** The Pokemon to which this animation applies */
-  private pokemon: Pokemon;
+  protected pokemon: Pokemon;
   /** Any other field sprites affected by this animation */
-  private fieldAssets: Phaser.GameObjects.Sprite[];
+  protected fieldAssets: Phaser.GameObjects.Sprite[];
 
-  constructor(key: PokemonAnimType, pokemon: Pokemon, fieldAssets?: Phaser.GameObjects.Sprite[]) {
+  constructor(key: PokemonAnimType, pokemon: Pokemon, fieldAssets: Phaser.GameObjects.Sprite[] = []) {
     super();
 
     this.key = key;
     this.pokemon = pokemon;
-    this.fieldAssets = fieldAssets ?? [];
+    this.fieldAssets = fieldAssets;
   }
 
   start(): void {

src/phases/pokemon-heal-phase.ts

@@ -8,7 +8,7 @@ import { getPokemonNameWithAffix } from "#app/messages";
 import { HealingBoosterModifier } from "#app/modifier/modifier";
 import { HealAchv } from "#app/system/achv";
 import i18next from "i18next";
-import * as Utils from "#app/utils";
+import { NumberHolder } from "#app/utils";
 import { CommonAnimPhase } from "./common-anim-phase";
 import { BattlerTagType } from "#app/enums/battler-tag-type";
 import type { HealBlockTag } from "#app/data/battler-tags";
@@ -72,11 +72,11 @@ export class PokemonHealPhase extends CommonAnimPhase {
       return super.end();
     }
     if (healOrDamage) {
-      const hpRestoreMultiplier = new Utils.NumberHolder(1);
+      const hpRestoreMultiplier = new NumberHolder(1);
       if (!this.revive) {
         globalScene.applyModifiers(HealingBoosterModifier, this.player, hpRestoreMultiplier);
       }
-      const healAmount = new Utils.NumberHolder(Math.floor(this.hpHealed * hpRestoreMultiplier.value));
+      const healAmount = new NumberHolder(Math.floor(this.hpHealed * hpRestoreMultiplier.value));
       if (healAmount.value < 0) {
         pokemon.damageAndUpdate(healAmount.value * -1, { result: HitResult.INDIRECT });
         healAmount.value = 0;

src/phases/pokemon-phase.ts

@@ -11,11 +11,14 @@ export abstract class PokemonPhase extends FieldPhase {
   constructor(battlerIndex?: BattlerIndex | number) {
     super();
 
-    if (battlerIndex === undefined) {
+    battlerIndex =
-      battlerIndex = globalScene
+      battlerIndex ??
+      globalScene
         .getField()
-        .find(p => p?.isActive())!
+        .find(p => p?.isActive())! // TODO: is the bang correct here?
-        .getBattlerIndex(); // TODO: is the bang correct here?
+        .getBattlerIndex();
+    if (battlerIndex === undefined) {
+      console.warn("There are no Pokemon on the field!"); // TODO: figure out a suitable fallback behavior
     }
 
     this.battlerIndex = battlerIndex;

src/phases/post-game-over-phase.ts

@@ -4,12 +4,12 @@ import type { EndCardPhase } from "./end-card-phase";
 import { TitlePhase } from "./title-phase";
 
 export class PostGameOverPhase extends Phase {
-  private endCardPhase: EndCardPhase | null;
+  private endCardPhase?: EndCardPhase;
 
   constructor(endCardPhase?: EndCardPhase) {
     super();
 
-    this.endCardPhase = endCardPhase!; // TODO: is this bang correct?
+    this.endCardPhase = endCardPhase;
   }
 
   start() {

src/phases/post-turn-status-effect-phase.ts

@@ -13,7 +13,7 @@ import { getStatusEffectActivationText } from "#app/data/status-effect";
 import { BattleSpec } from "#app/enums/battle-spec";
 import { StatusEffect } from "#app/enums/status-effect";
 import { getPokemonNameWithAffix } from "#app/messages";
-import * as Utils from "#app/utils";
+import { BooleanHolder, NumberHolder } from "#app/utils";
 import { PokemonPhase } from "./pokemon-phase";
 
 export class PostTurnStatusEffectPhase extends PokemonPhase {
@@ -26,7 +26,7 @@ export class PostTurnStatusEffectPhase extends PokemonPhase {
     const pokemon = this.getPokemon();
     if (pokemon?.isActive(true) && pokemon.status && pokemon.status.isPostTurn() && !pokemon.switchOutStatus) {
       pokemon.status.incrementTurn();
-      const cancelled = new Utils.BooleanHolder(false);
+      const cancelled = new BooleanHolder(false);
       applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
       applyAbAttrs(BlockStatusDamageAbAttr, pokemon, cancelled);
 
@@ -34,7 +34,7 @@ export class PostTurnStatusEffectPhase extends PokemonPhase {
         globalScene.queueMessage(
           getStatusEffectActivationText(pokemon.status.effect, getPokemonNameWithAffix(pokemon)),
         );
-        const damage = new Utils.NumberHolder(0);
+        const damage = new NumberHolder(0);
         switch (pokemon.status.effect) {
           case StatusEffect.POISON:
             damage.value = Math.max(pokemon.getMaxHp() >> 3, 1);

src/phases/reload-session-phase.ts

@@ -1,15 +1,15 @@
 import { globalScene } from "#app/global-scene";
 import { Phase } from "#app/phase";
 import { Mode } from "#app/ui/ui";
-import * as Utils from "#app/utils";
+import { fixedInt } from "#app/utils";
 
 export class ReloadSessionPhase extends Phase {
-  private systemDataStr: string | null;
+  private systemDataStr?: string;
 
   constructor(systemDataStr?: string) {
     super();
 
-    this.systemDataStr = systemDataStr ?? null;
+    this.systemDataStr = systemDataStr;
   }
 
   start(): void {
@@ -18,7 +18,7 @@ export class ReloadSessionPhase extends Phase {
     let delayElapsed = false;
     let loaded = false;
 
-    globalScene.time.delayedCall(Utils.fixedInt(1500), () => {
+    globalScene.time.delayedCall(fixedInt(1500), () => {
       if (loaded) {
         this.end();
       } else {

src/phases/reset-status-phase.ts

@@ -0,0 +1,44 @@
+import type Pokemon from "#app/field/pokemon";
+import { BattlePhase } from "#app/phases/battle-phase";
+import { BattlerTagType } from "#enums/battler-tag-type";
+import { StatusEffect } from "#enums/status-effect";
+
+/**
+ * Phase which handles resetting a Pokemon's status to none
+ *
+ * This is necessary to perform in a phase primarly to ensure that the status icon disappears at the correct time in the battle
+ */
+export class ResetStatusPhase extends BattlePhase {
+  private readonly pokemon: Pokemon;
+  private readonly affectConfusion: boolean;
+  private readonly reloadAssets: boolean;
+
+  constructor(pokemon: Pokemon, affectConfusion: boolean, reloadAssets: boolean) {
+    super();
+
+    this.pokemon = pokemon;
+    this.affectConfusion = affectConfusion;
+    this.reloadAssets = reloadAssets;
+  }
+
+  public override start() {
+    const lastStatus = this.pokemon.status?.effect;
+    this.pokemon.status = null;
+    if (lastStatus === StatusEffect.SLEEP) {
+      this.pokemon.setFrameRate(10);
+      if (this.pokemon.getTag(BattlerTagType.NIGHTMARE)) {
+        this.pokemon.lapseTag(BattlerTagType.NIGHTMARE);
+      }
+    }
+    if (this.affectConfusion) {
+      if (this.pokemon.getTag(BattlerTagType.CONFUSED)) {
+        this.pokemon.lapseTag(BattlerTagType.CONFUSED);
+      }
+    }
+    if (this.reloadAssets) {
+      this.pokemon.loadAssets(false).then(() => this.pokemon.playAnim());
+    }
+    this.pokemon.updateInfo(true);
+    this.end();
+  }
+}

src/phases/scan-ivs-phase.ts

@@ -8,6 +8,7 @@ import i18next from "i18next";
 import { PokemonPhase } from "./pokemon-phase";
 
 export class ScanIvsPhase extends PokemonPhase {
+  // biome-ignore lint/complexity/noUselessConstructor: This changes `battlerIndex` to be required
   constructor(battlerIndex: BattlerIndex) {
     super(battlerIndex);
   }
@@ -24,7 +25,8 @@ export class ScanIvsPhase extends PokemonPhase {
     const uiTheme = globalScene.uiTheme; // Assuming uiTheme is accessible
     for (let e = 0; e < enemyField.length; e++) {
       enemyIvs = enemyField[e].ivs;
-      const currentIvs = globalScene.gameData.dexData[enemyField[e].species.getRootSpeciesId()].ivs; // we are using getRootSpeciesId() here because we want to check against the baby form, not the mid form if it exists
+      // we are using getRootSpeciesId() here because we want to check against the baby form, not the mid form if it exists
+      const currentIvs = globalScene.gameData.dexData[enemyField[e].species.getRootSpeciesId()].ivs;
       statsContainer = enemyField[e].getBattleInfo().getStatsValueContainer().list as Phaser.GameObjects.Sprite[];
       statsContainerLabels = statsContainer.filter(m => m.name.indexOf("icon_stat_label") >= 0);
       for (let s = 0; s < statsContainerLabels.length; s++) {

src/phases/select-biome-phase.ts

@@ -5,15 +5,11 @@ import { MoneyInterestModifier, MapModifier } from "#app/modifier/modifier";
 import type { OptionSelectItem } from "#app/ui/abstact-option-select-ui-handler";
 import { Mode } from "#app/ui/ui";
 import { BattlePhase } from "./battle-phase";
-import * as Utils from "#app/utils";
+import { randSeedInt } from "#app/utils";
 import { PartyHealPhase } from "./party-heal-phase";
 import { SwitchBiomePhase } from "./switch-biome-phase";
 
 export class SelectBiomePhase extends BattlePhase {
-  constructor() {
-    super();
-  }
-
   start() {
     super.start();
 
@@ -40,7 +36,7 @@ export class SelectBiomePhase extends BattlePhase {
       let biomes: Biome[] = [];
       globalScene.executeWithSeedOffset(() => {
         biomes = (biomeLinks[currentBiome] as (Biome | [Biome, number])[])
-          .filter(b => !Array.isArray(b) || !Utils.randSeedInt(b[1]))
+          .filter(b => !Array.isArray(b) || !randSeedInt(b[1]))
           .map(b => (!Array.isArray(b) ? b : b[0]));
       }, globalScene.currentBattle.waveIndex);
       if (biomes.length > 1 && globalScene.findModifier(m => m instanceof MapModifier)) {
@@ -51,7 +47,7 @@ export class SelectBiomePhase extends BattlePhase {
               ? [biomeLinks[currentBiome] as Biome]
               : (biomeLinks[currentBiome] as (Biome | [Biome, number])[])
           )
-            .filter((b, _i) => !Array.isArray(b) || !Utils.randSeedInt(b[1]))
+            .filter(b => !Array.isArray(b) || !randSeedInt(b[1]))
             .map(b => (Array.isArray(b) ? b[0] : b));
         }, globalScene.currentBattle.waveIndex);
         const biomeSelectItems = biomeChoices.map(b => {
@@ -70,7 +66,7 @@ export class SelectBiomePhase extends BattlePhase {
           delay: 1000,
         });
       } else {
-        setNextBiome(biomes[Utils.randSeedInt(biomes.length)]);
+        setNextBiome(biomes[randSeedInt(biomes.length)]);
       }
     } else if (biomeLinks.hasOwnProperty(currentBiome)) {
       setNextBiome(biomeLinks[currentBiome] as Biome);

src/phases/select-challenge-phase.ts

@@ -3,10 +3,6 @@ import { Phase } from "#app/phase";
 import { Mode } from "#app/ui/ui";
 
 export class SelectChallengePhase extends Phase {
-  constructor() {
-    super();
-  }
-
   start() {
     super.start();
 

src/phases/select-gender-phase.ts

@@ -6,10 +6,6 @@ import { Mode } from "#app/ui/ui";
 import i18next from "i18next";
 
 export class SelectGenderPhase extends Phase {
-  constructor() {
-    super();
-  }
-
   start(): void {
     super.start();
 

src/phases/select-modifier-phase.ts

@@ -26,7 +26,6 @@ import { SHOP_OPTIONS_ROW_LIMIT } from "#app/ui/modifier-select-ui-handler";
 import PartyUiHandler, { PartyUiMode, PartyOption } from "#app/ui/party-ui-handler";
 import { Mode } from "#app/ui/ui";
 import i18next from "i18next";
-import * as Utils from "#app/utils";
 import { BattlePhase } from "./battle-phase";
 import Overrides from "#app/overrides";
 import type { CustomModifierSettings } from "#app/modifier/modifier-type";
@@ -67,7 +66,7 @@ export class SelectModifierPhase extends BattlePhase {
     if (!this.isCopy) {
       regenerateModifierPoolThresholds(party, this.getPoolType(), this.rerollCount);
     }
-    const modifierCount = new Utils.NumberHolder(3);
+    const modifierCount = new NumberHolder(3);
     if (this.isPlayer()) {
       globalScene.applyModifiers(ExtraModifierModifier, true, modifierCount);
       globalScene.applyModifiers(TempExtraModifierModifier, true, modifierCount);

src/phases/select-starter-phase.ts

@@ -15,10 +15,6 @@ import SoundFade from "phaser3-rex-plugins/plugins/soundfade";
 import * as Utils from "../utils";
 
 export class SelectStarterPhase extends Phase {
-  constructor() {
-    super();
-  }
-
   start() {
     super.start();
 

src/phases/select-target-phase.ts

@@ -8,6 +8,7 @@ import i18next from "#app/plugins/i18n";
 import { allMoves } from "#app/data/moves/move";
 
 export class SelectTargetPhase extends PokemonPhase {
+  // biome-ignore lint/complexity/noUselessConstructor: This makes `fieldIndex` required
   constructor(fieldIndex: number) {
     super(fieldIndex);
   }

src/phases/shiny-sparkle-phase.ts

@@ -3,6 +3,7 @@ import type { BattlerIndex } from "#app/battle";
 import { PokemonPhase } from "./pokemon-phase";
 
 export class ShinySparklePhase extends PokemonPhase {
+  // biome-ignore lint/complexity/noUselessConstructor: This makes `battlerIndex` required
   constructor(battlerIndex: BattlerIndex) {
     super(battlerIndex);
   }

src/phases/show-party-exp-bar-phase.ts

@@ -2,7 +2,7 @@ import { globalScene } from "#app/global-scene";
 import { ExpGainsSpeed } from "#app/enums/exp-gains-speed";
 import { ExpNotification } from "#app/enums/exp-notification";
 import { ExpBoosterModifier } from "#app/modifier/modifier";
-import * as Utils from "#app/utils";
+import { NumberHolder } from "#app/utils";
 import { HidePartyExpBarPhase } from "./hide-party-exp-bar-phase";
 import { LevelUpPhase } from "./level-up-phase";
 import { PlayerPartyMemberPokemonPhase } from "./player-party-member-pokemon-phase";
@@ -20,7 +20,7 @@ export class ShowPartyExpBarPhase extends PlayerPartyMemberPokemonPhase {
     super.start();
 
     const pokemon = this.getPokemon();
-    const exp = new Utils.NumberHolder(this.expValue);
+    const exp = new NumberHolder(this.expValue);
     globalScene.applyModifiers(ExpBoosterModifier, true, exp);
     exp.value = Math.floor(exp.value);
 

src/phases/show-trainer-phase.ts

@@ -3,10 +3,6 @@ import { PlayerGender } from "#app/enums/player-gender";
 import { BattlePhase } from "./battle-phase";
 
 export class ShowTrainerPhase extends BattlePhase {
-  constructor() {
-    super();
-  }
-
   start() {
     super.start();
 

src/phases/summon-missing-phase.ts

@@ -4,10 +4,6 @@ import { SummonPhase } from "./summon-phase";
 import { globalScene } from "#app/global-scene";
 
 export class SummonMissingPhase extends SummonPhase {
-  constructor(fieldIndex: number) {
-    super(fieldIndex);
-  }
-
   preSummon(): void {
     globalScene.ui.showText(
       i18next.t("battle:sendOutPokemon", {

src/phases/switch-summon-phase.ts

@@ -23,11 +23,11 @@ export class SwitchSummonPhase extends SummonPhase {
 
   /**
    * Constructor for creating a new SwitchSummonPhase
-   * @param switchType the type of switch behavior
+   * @param switchType - The type of switch behavior
-   * @param fieldIndex integer representing position on the battle field
+   * @param fieldIndex - Position on the battle field
-   * @param slotIndex integer for the index of pokemon (in party of 6) to switch into
+   * @param slotIndex - The index of pokemon (in party of 6) to switch into
-   * @param doReturn boolean whether to render "comeback" dialogue
+   * @param doReturn - Whether to render "comeback" dialogue
-   * @param player boolean if the switch is from the player
+   * @param player - (Optional) `true` if the switch is from the player
    */
   constructor(switchType: SwitchType, fieldIndex: number, slotIndex: number, doReturn: boolean, player?: boolean) {
     super(fieldIndex, player !== undefined ? player : true);

src/phases/test-message-phase.ts

@@ -1,7 +0,0 @@
-import { MessagePhase } from "./message-phase";
-
-export class TestMessagePhase extends MessagePhase {
-  constructor(message: string) {
-    super(message, null, true);
-  }
-}

src/phases/title-phase.ts

@@ -18,7 +18,7 @@ import { vouchers } from "#app/system/voucher";
 import type { OptionSelectConfig, OptionSelectItem } from "#app/ui/abstact-option-select-ui-handler";
 import { SaveSlotUiMode } from "#app/ui/save-slot-select-ui-handler";
 import { Mode } from "#app/ui/ui";
-import * as Utils from "#app/utils";
+import { isLocal, isLocalServerConnected, isNullOrUndefined } from "#app/utils";
 import i18next from "i18next";
 import { CheckSwitchPhase } from "./check-switch-phase";
 import { EncounterPhase } from "./encounter-phase";
@@ -29,16 +29,10 @@ import { globalScene } from "#app/global-scene";
 import Overrides from "#app/overrides";
 
 export class TitlePhase extends Phase {
-  private loaded: boolean;
+  private loaded = false;
   private lastSessionData: SessionSaveData;
   public gameMode: GameModes;
 
-  constructor() {
-    super();
-
-    this.loaded = false;
-  }
-
   start(): void {
     super.start();
 
@@ -282,7 +276,7 @@ export class TitlePhase extends Phase {
       };
 
       // If Online, calls seed fetch from db to generate daily run. If Offline, generates a daily run based on current date.
-      if (!Utils.isLocal || Utils.isLocalServerConnected) {
+      if (!isLocal || isLocalServerConnected) {
         fetchDailyRunSeed()
           .then(seed => {
             if (seed) {
@@ -296,7 +290,7 @@ export class TitlePhase extends Phase {
           });
       } else {
         let seed: string = btoa(new Date().toISOString().substring(0, 10));
-        if (!Utils.isNullOrUndefined(Overrides.DAILY_RUN_SEED_OVERRIDE)) {
+        if (!isNullOrUndefined(Overrides.DAILY_RUN_SEED_OVERRIDE)) {
           seed = Overrides.DAILY_RUN_SEED_OVERRIDE;
         }
         generateDaily(seed);

src/phases/trainer-message-test-phase.ts

@@ -1,47 +0,0 @@
-import { globalScene } from "#app/global-scene";
-import { trainerConfigs } from "#app/data/trainers/trainer-config";
-import type { TrainerType } from "#app/enums/trainer-type";
-import { BattlePhase } from "./battle-phase";
-import { TestMessagePhase } from "./test-message-phase";
-
-export class TrainerMessageTestPhase extends BattlePhase {
-  private trainerTypes: TrainerType[];
-
-  constructor(...trainerTypes: TrainerType[]) {
-    super();
-
-    this.trainerTypes = trainerTypes;
-  }
-
-  start() {
-    super.start();
-
-    const testMessages: string[] = [];
-
-    for (const t of Object.keys(trainerConfigs)) {
-      const type = Number.parseInt(t);
-      if (this.trainerTypes.length && !this.trainerTypes.find(tt => tt === (type as TrainerType))) {
-        continue;
-      }
-      const config = trainerConfigs[type];
-      [
-        config.encounterMessages,
-        config.femaleEncounterMessages,
-        config.victoryMessages,
-        config.femaleVictoryMessages,
-        config.defeatMessages,
-        config.femaleDefeatMessages,
-      ].map(messages => {
-        if (messages?.length) {
-          testMessages.push(...messages);
-        }
-      });
-    }
-
-    for (const message of testMessages) {
-      globalScene.pushPhase(new TestMessagePhase(message));
-    }
-
-    this.end();
-  }
-}

src/phases/trainer-victory-phase.ts

@@ -3,7 +3,7 @@ import { TrainerType } from "#app/enums/trainer-type";
 import { modifierTypes } from "#app/modifier/modifier-type";
 import { vouchers } from "#app/system/voucher";
 import i18next from "i18next";
-import * as Utils from "#app/utils";
+import { randSeedItem } from "#app/utils";
 import { BattlePhase } from "./battle-phase";
 import { ModifierRewardPhase } from "./modifier-reward-phase";
 import { MoneyRewardPhase } from "./money-reward-phase";
@@ -14,10 +14,6 @@ import { achvs } from "#app/system/achv";
 import { timedEventManager } from "#app/global-event-manager";
 
 export class TrainerVictoryPhase extends BattlePhase {
-  constructor() {
-    super();
-  }
-
   start() {
     globalScene.disableMenu = true;
 
@@ -82,7 +78,7 @@ export class TrainerVictoryPhase extends BattlePhase {
         const victoryMessages = globalScene.currentBattle.trainer?.getVictoryMessages()!; // TODO: is this bang correct?
         let message: string;
         globalScene.executeWithSeedOffset(
-          () => (message = Utils.randSeedItem(victoryMessages)),
+          () => (message = randSeedItem(victoryMessages)),
           globalScene.currentBattle.waveIndex,
         );
         message = message!; // tell TS compiler it's defined now

src/phases/turn-end-phase.ts

@@ -18,10 +18,6 @@ import { PokemonHealPhase } from "./pokemon-heal-phase";
 import { globalScene } from "#app/global-scene";
 
 export class TurnEndPhase extends FieldPhase {
-  constructor() {
-    super();
-  }
-
   start() {
     super.start();
 

src/phases/turn-init-phase.ts

@@ -15,10 +15,6 @@ import { TurnStartPhase } from "./turn-start-phase";
 import { globalScene } from "#app/global-scene";
 
 export class TurnInitPhase extends FieldPhase {
-  constructor() {
-    super();
-  }
-
   start() {
     super.start();
 

src/phases/turn-start-phase.ts

@@ -6,7 +6,7 @@ import type Pokemon from "#app/field/pokemon";
 import { PokemonMove } from "#app/field/pokemon";
 import { BypassSpeedChanceModifier } from "#app/modifier/modifier";
 import { Command } from "#app/ui/command-ui-handler";
-import * as Utils from "#app/utils";
+import { randSeedShuffle, BooleanHolder } from "#app/utils";
 import { AttemptCapturePhase } from "./attempt-capture-phase";
 import { AttemptRunPhase } from "./attempt-run-phase";
 import { BerryPhase } from "./berry-phase";
@@ -24,10 +24,6 @@ import { globalScene } from "#app/global-scene";
 import { TeraPhase } from "./tera-phase";
 
 export class TurnStartPhase extends FieldPhase {
-  constructor() {
-    super();
-  }
-
   /**
    * This orders the active Pokemon on the field by speed into an BattlerIndex array and returns that array.
    * It also checks for Trick Room and reverses the array if it is present.
@@ -43,14 +39,14 @@ export class TurnStartPhase extends FieldPhase {
     // was varying based on how long since you last reloaded
     globalScene.executeWithSeedOffset(
       () => {
-        orderedTargets = Utils.randSeedShuffle(orderedTargets);
+        orderedTargets = randSeedShuffle(orderedTargets);
       },
       globalScene.currentBattle.turn,
       globalScene.waveSeed,
     );
 
     // Next, a check for Trick Room is applied to determine sort order.
-    const speedReversed = new Utils.BooleanHolder(false);
+    const speedReversed = new BooleanHolder(false);
     globalScene.arena.applyTags(TrickRoomTag, false, speedReversed);
 
     // Adjust the sort function based on whether Trick Room is active.
@@ -80,8 +76,8 @@ export class TurnStartPhase extends FieldPhase {
       .getField(true)
       .filter(p => p.summonData)
       .map(p => {
-        const bypassSpeed = new Utils.BooleanHolder(false);
+        const bypassSpeed = new BooleanHolder(false);
-        const canCheckHeldItems = new Utils.BooleanHolder(true);
+        const canCheckHeldItems = new BooleanHolder(true);
         applyAbAttrs(BypassSpeedChanceAbAttr, p, null, false, bypassSpeed);
         applyAbAttrs(PreventBypassSpeedChanceAbAttr, p, null, false, bypassSpeed, canCheckHeldItems);
         if (canCheckHeldItems.value) {

src/phases/unavailable-phase.ts

@@ -4,10 +4,6 @@ import { Mode } from "#app/ui/ui";
 import { LoginPhase } from "./login-phase";
 
 export class UnavailablePhase extends Phase {
-  constructor() {
-    super();
-  }
-
   start(): void {
     globalScene.ui.setMode(Mode.UNAVAILABLE, () => {
       globalScene.unshiftPhase(new LoginPhase(true));

src/phases/weather-effect-phase.ts

@@ -15,7 +15,7 @@ import { BattlerTagType } from "#app/enums/battler-tag-type";
 import { WeatherType } from "#app/enums/weather-type";
 import type Pokemon from "#app/field/pokemon";
 import { HitResult } from "#app/field/pokemon";
-import * as Utils from "#app/utils";
+import { BooleanHolder, toDmgValue } from "#app/utils";
 import { CommonAnimPhase } from "./common-anim-phase";
 
 export class WeatherEffectPhase extends CommonAnimPhase {
@@ -35,14 +35,13 @@ export class WeatherEffectPhase extends CommonAnimPhase {
     this.weather = globalScene?.arena?.weather;
 
     if (!this.weather) {
-      this.end();
+      return this.end();
-      return;
     }
 
     this.setAnimation(CommonAnim.SUNNY + (this.weather.weatherType - 1));
 
     if (this.weather.isDamaging()) {
-      const cancelled = new Utils.BooleanHolder(false);
+      const cancelled = new BooleanHolder(false);
 
       this.executeForAll((pokemon: Pokemon) =>
         applyPreWeatherEffectAbAttrs(SuppressWeatherEffectAbAttr, pokemon, this.weather, cancelled),
@@ -50,7 +49,7 @@ export class WeatherEffectPhase extends CommonAnimPhase {
 
       if (!cancelled.value) {
         const inflictDamage = (pokemon: Pokemon) => {
-          const cancelled = new Utils.BooleanHolder(false);
+          const cancelled = new BooleanHolder(false);
 
           applyPreWeatherEffectAbAttrs(PreWeatherDamageAbAttr, pokemon, this.weather, cancelled);
           applyAbAttrs(BlockNonDirectDamageAbAttr, pokemon, cancelled);
@@ -63,9 +62,9 @@ export class WeatherEffectPhase extends CommonAnimPhase {
             return;
           }
 
-          const damage = Utils.toDmgValue(pokemon.getMaxHp() / 16);
+          const damage = toDmgValue(pokemon.getMaxHp() / 16);
 
-          globalScene.queueMessage(getWeatherDamageMessage(this.weather?.weatherType!, pokemon)!); // TODO: are those bangs correct?
+          globalScene.queueMessage(getWeatherDamageMessage(this.weather!.weatherType, pokemon) ?? "");
           pokemon.damageAndUpdate(damage, { result: HitResult.INDIRECT, ignoreSegments: true });
         };
 

src/system/version_migration/version_converter.ts

@@ -1,19 +1,104 @@
-import type { SessionSaveData, SystemSaveData } from "../game-data";
+import type { SessionSaveMigrator } from "#app/@types/SessionSaveMigrator";
+import type { SettingsSaveMigrator } from "#app/@types/SettingsSaveMigrator";
+import type { SystemSaveMigrator } from "#app/@types/SystemSaveMigrator";
+import type { SessionSaveData, SystemSaveData } from "#app/system/game-data";
+import { compareVersions } from "compare-versions";
 import { version } from "../../../package.json";
 
+/*
+// template for save migrator creation
+// versions/vA_B_C.ts
+
+// The version for each migrator should match the filename, ie: `vA_B_C.ts` -> `version: "A.B.C"
+// This is the target version (aka the version we're ending up on after the migrators are run)
+
+// The name for each migrator should match its purpose. For example, if you're fixing
+// the ability index of a pokemon, it might be called `migratePokemonAbilityIndex`
+
+const systemMigratorA: SystemSaveMigrator = {
+  version: "A.B.C",
+  migrate: (data: SystemSaveData): void => {
+    // migration code goes here
+  },
+};
+
+export const systemMigrators: Readonly<SystemSaveMigrator[]> = [systemMigratorA] as const;
+
+const sessionMigratorA: SessionSaveMigrator = {
+  version: "A.B.C",
+  migrate: (data: SessionSaveData): void => {
+    // migration code goes here
+  },
+};
+
+export const sessionMigrators: Readonly<SessionSaveMigrator[]> = [sessionMigratorA] as const;
+
+const settingsMigratorA: SettingsSaveMigrator = {
+  version: "A.B.C",
+  // biome-ignore lint/complexity/noBannedTypes: TODO - refactor settings
+  migrate: (data: Object): void => {
+    // migration code goes here
+  },
+};
+
+export const settingsMigrators: Readonly<SettingsSaveMigrator[]> = [settingsMigratorA] as const;
+*/
+
+// --- vA.B.C PATCHES --- //
+// import * as vA_B_C from "./versions/vA_B_C";
+
 // --- v1.0.4 (and below) PATCHES --- //
 import * as v1_0_4 from "./versions/v1_0_4";
 
-// --- v1.1.0 PATCHES --- //
-import * as v1_1_0 from "./versions/v1_1_0";
-
 // --- v1.7.0 PATCHES --- //
 import * as v1_7_0 from "./versions/v1_7_0";
 
 // --- v1.8.3 PATCHES --- //
 import * as v1_8_3 from "./versions/v1_8_3";
 
-const LATEST_VERSION = version.split(".").map(value => Number.parseInt(value));
+/** Current game version */
+const LATEST_VERSION = version;
+
+type SaveMigrator = SystemSaveMigrator | SessionSaveMigrator | SettingsSaveMigrator;
+
+// biome-ignore lint/complexity/noBannedTypes: TODO - refactor settings
+type SaveData = SystemSaveData | SessionSaveData | Object;
+
+// To add a new set of migrators, create a new `.push()` line like so:
+// `systemMigrators.push(...vA_B_C.systemMigrators);`
+
+/** All system save migrators */
+const systemMigrators: SystemSaveMigrator[] = [];
+systemMigrators.push(...v1_0_4.systemMigrators);
+systemMigrators.push(...v1_7_0.systemMigrators);
+systemMigrators.push(...v1_8_3.systemMigrators);
+
+/** All session save migrators */
+const sessionMigrators: SessionSaveMigrator[] = [];
+sessionMigrators.push(...v1_0_4.sessionMigrators);
+sessionMigrators.push(...v1_7_0.sessionMigrators);
+
+/** All settings migrators */
+const settingsMigrators: SettingsSaveMigrator[] = [];
+settingsMigrators.push(...v1_0_4.settingsMigrators);
+
+/** Sorts migrators by their stated version, ensuring they are applied in order from oldest to newest */
+const sortMigrators = (migrators: SaveMigrator[]): void => {
+  migrators.sort((a, b) => compareVersions(a.version, b.version));
+};
+
+sortMigrators(systemMigrators);
+sortMigrators(sessionMigrators);
+sortMigrators(settingsMigrators);
+
+const applyMigrators = (migrators: readonly SaveMigrator[], data: SaveData, saveVersion: string) => {
+  for (const migrator of migrators) {
+    const isMigratorVersionHigher = compareVersions(saveVersion, migrator.version) === -1;
+    if (isMigratorVersionHigher) {
+      migrator.migrate(data as any);
+    }
+  }
+};
 
 /**
  * Converts incoming {@linkcode SystemSaveData} that has a version below the
@@ -26,12 +111,12 @@ const LATEST_VERSION = version.split(".").map(value => Number.parseInt(value));
  * @see {@link SystemVersionConverter}
  */
 export function applySystemVersionMigration(data: SystemSaveData) {
-  const curVersion = data.gameVersion.split(".").map(value => Number.parseInt(value));
+  const prevVersion = data.gameVersion;
+  const isCurrentVersionHigher = compareVersions(prevVersion, LATEST_VERSION) === -1;
 
-  if (!curVersion.every((value, index) => value === LATEST_VERSION[index])) {
+  if (isCurrentVersionHigher) {
-    const converter = new SystemVersionConverter();
+    applyMigrators(systemMigrators, data, prevVersion);
-    converter.applyStaticPreprocessors(data);
+    console.log(`System data successfully migrated to v${LATEST_VERSION}!`);
-    converter.applyMigration(data, curVersion);
   }
 }
 
@@ -46,12 +131,15 @@ export function applySystemVersionMigration(data: SystemSaveData) {
  * @see {@link SessionVersionConverter}
  */
 export function applySessionVersionMigration(data: SessionSaveData) {
-  const curVersion = data.gameVersion.split(".").map(value => Number.parseInt(value));
+  const prevVersion = data.gameVersion;
+  const isCurrentVersionHigher = compareVersions(prevVersion, LATEST_VERSION) === -1;
 
-  if (!curVersion.every((value, index) => value === LATEST_VERSION[index])) {
+  if (isCurrentVersionHigher) {
-    const converter = new SessionVersionConverter();
+    // Always sanitize money as a safeguard
-    converter.applyStaticPreprocessors(data);
+    data.money = Math.floor(data.money);
-    converter.applyMigration(data, curVersion);
+
+    applyMigrators(sessionMigrators, data, prevVersion);
+    console.log(`Session data successfully migrated to v${LATEST_VERSION}!`);
   }
 }
 
@@ -65,156 +153,13 @@ export function applySessionVersionMigration(data: SessionSaveData) {
  * @param data Settings data object
  * @see {@link SettingsVersionConverter}
  */
+// biome-ignore lint/complexity/noBannedTypes: TODO - refactor settings
 export function applySettingsVersionMigration(data: Object) {
-  const gameVersion: string = data.hasOwnProperty("gameVersion") ? data["gameVersion"] : "1.0.0";
+  const prevVersion: string = data.hasOwnProperty("gameVersion") ? data["gameVersion"] : "1.0.0";
-  const curVersion = gameVersion.split(".").map(value => Number.parseInt(value));
+  const isCurrentVersionHigher = compareVersions(prevVersion, LATEST_VERSION) === -1;
 
-  if (!curVersion.every((value, index) => value === LATEST_VERSION[index])) {
+  if (isCurrentVersionHigher) {
-    const converter = new SettingsVersionConverter();
+    applyMigrators(settingsMigrators, data, prevVersion);
-    converter.applyStaticPreprocessors(data);
+    console.log(`Settings successfully migrated to v${LATEST_VERSION}!`);
-    converter.applyMigration(data, curVersion);
-  }
-}
-
-/**
- * Abstract class encapsulating the logic for migrating data from a given version up to
- * the current version listed in `package.json`.
- *
- * Note that, for any version converter, the corresponding `applyMigration`
- * function would only need to be changed once when the first migration for a
- * given version is introduced. Similarly, a version file (within the `versions`
- * folder) would only need to be created for a version once with the appropriate
- * array nomenclature.
- */
-abstract class VersionConverter {
-  /**
-   * Iterates through an array of designated migration functions that are each
-   * called one by one to transform the data.
-   * @param data The data to be operated on
-   * @param migrationArr An array of functions that will transform the incoming data
-   */
-  callMigrators(data: any, migrationArr: readonly any[]) {
-    for (const migrate of migrationArr) {
-      migrate(data);
-    }
-  }
-
-  /**
-   * Applies any version-agnostic data sanitation as defined within the function
-   * body.
-   * @param data The data to be operated on
-   */
-  applyStaticPreprocessors(_data: any): void {}
-
-  /**
-   * Uses the current version the incoming data to determine the starting point
-   * of the migration which will cascade up to the latest version, calling the
-   * necessary migration functions in the process.
-   * @param data The data to be operated on
-   * @param curVersion [0] Current major version
-   *                   [1] Current minor version
-   *                   [2] Current patch version
-   */
-  abstract applyMigration(data: any, curVersion: number[]): void;
-}
-
-/**
- * Class encapsulating the logic for migrating {@linkcode SessionSaveData} from
- * a given version up to the current version listed in `package.json`.
- * @extends VersionConverter
- */
-class SessionVersionConverter extends VersionConverter {
-  override applyStaticPreprocessors(data: SessionSaveData): void {
-    // Always sanitize money as a safeguard
-    data.money = Math.floor(data.money);
-  }
-
-  override applyMigration(data: SessionSaveData, curVersion: number[]): void {
-    const [curMajor, curMinor, curPatch] = curVersion;
-
-    if (curMajor === 1) {
-      if (curMinor === 0) {
-        if (curPatch <= 5) {
-          console.log("Applying v1.0.4 session data migration!");
-          this.callMigrators(data, v1_0_4.sessionMigrators);
-        }
-      }
-      if (curMinor <= 1) {
-        console.log("Applying v1.1.0 session data migration!");
-        this.callMigrators(data, v1_1_0.sessionMigrators);
-      }
-      if (curMinor < 7) {
-        console.log("Applying v1.7.0 session data migration!");
-        this.callMigrators(data, v1_7_0.sessionMigrators);
-      }
-    }
-
-    console.log(`Session data successfully migrated to v${version}!`);
-  }
-}
-
-/**
- * Class encapsulating the logic for migrating {@linkcode SystemSaveData} from
- * a given version up to the current version listed in `package.json`.
- * @extends VersionConverter
- */
-class SystemVersionConverter extends VersionConverter {
-  override applyMigration(data: SystemSaveData, curVersion: number[]): void {
-    const [curMajor, curMinor, curPatch] = curVersion;
-
-    if (curMajor === 1) {
-      if (curMinor === 0) {
-        if (curPatch <= 4) {
-          console.log("Applying v1.0.4 system data migraton!");
-          this.callMigrators(data, v1_0_4.systemMigrators);
-        }
-      }
-      if (curMinor <= 1) {
-        console.log("Applying v1.1.0 system data migraton!");
-        this.callMigrators(data, v1_1_0.systemMigrators);
-      }
-      if (curMinor < 7) {
-        console.log("Applying v1.7.0 system data migration!");
-        this.callMigrators(data, v1_7_0.systemMigrators);
-      }
-      if (curMinor === 8) {
-        if (curPatch <= 2) {
-          console.log("Applying v1.8.3 system data migration!");
-          this.callMigrators(data, v1_8_3.systemMigrators);
-        }
-      }
-    }
-
-    console.log(`System data successfully migrated to v${version}!`);
-  }
-}
-
-/**
- * Class encapsulating the logic for migrating settings data from
- * a given version up to the current version listed in `package.json`.
- * @extends VersionConverter
- */
-class SettingsVersionConverter extends VersionConverter {
-  override applyMigration(data: Object, curVersion: number[]): void {
-    const [curMajor, curMinor, curPatch] = curVersion;
-
-    if (curMajor === 1) {
-      if (curMinor === 0) {
-        if (curPatch <= 4) {
-          console.log("Applying v1.0.4 settings data migraton!");
-          this.callMigrators(data, v1_0_4.settingsMigrators);
-        }
-      }
-      if (curMinor <= 1) {
-        console.log("Applying v1.1.0 settings data migraton!");
-        this.callMigrators(data, v1_1_0.settingsMigrators);
-      }
-      if (curMinor < 7) {
-        console.log("Applying v1.7.0 settings data migration!");
-        this.callMigrators(data, v1_7_0.settingsMigrators);
-      }
-    }
-
-    console.log(`Settings data successfully migrated to v${version}!`);
   }
 }

src/system/version_migration/versions/v1_0_4.ts

@@ -4,15 +4,18 @@ import { AbilityAttr, defaultStarterSpecies, DexAttr } from "#app/system/game-da
 import { allSpecies } from "#app/data/pokemon-species";
 import { CustomPokemonData } from "#app/data/custom-pokemon-data";
 import { isNullOrUndefined } from "#app/utils";
+import type { SystemSaveMigrator } from "#app/@types/SystemSaveMigrator";
+import type { SettingsSaveMigrator } from "#app/@types/SettingsSaveMigrator";
+import type { SessionSaveMigrator } from "#app/@types/SessionSaveMigrator";
 
-export const systemMigrators = [
+/**
-  /**
+ * Migrate ability starter data if empty for caught species.
-   * Migrate ability starter data if empty for caught species.
+ * @param data - {@linkcode SystemSaveData}
-   * @param data {@linkcode SystemSaveData}
+ */
-   */
+const migrateAbilityData: SystemSaveMigrator = {
-  function migrateAbilityData(data: SystemSaveData) {
+  version: "1.0.4",
+  migrate: (data: SystemSaveData): void => {
     if (data.starterData && data.dexData) {
-      // biome-ignore lint/complexity/noForEach: <explanation>
       Object.keys(data.starterData).forEach(sd => {
         if (data.dexData[sd]?.caughtAttr && data.starterData[sd] && !data.starterData[sd].abilityAttr) {
           data.starterData[sd].abilityAttr = 1;
@@ -20,12 +23,15 @@ export const systemMigrators = [
       });
     }
   },
+};
 
-  /**
+/**
-   * Populate legendary Pokémon statistics if they are missing.
+ * Populate legendary Pokémon statistics if they are missing.
-   * @param data {@linkcode SystemSaveData}
+ * @param data - {@linkcode SystemSaveData}
-   */
+ */
-  function fixLegendaryStats(data: SystemSaveData) {
+const fixLegendaryStats: SystemSaveMigrator = {
+  version: "1.0.4",
+  migrate: (data: SystemSaveData): void => {
     if (
       data.gameStats &&
       data.gameStats.legendaryPokemonCaught !== undefined &&
@@ -34,7 +40,6 @@ export const systemMigrators = [
       data.gameStats.subLegendaryPokemonSeen = 0;
       data.gameStats.subLegendaryPokemonCaught = 0;
       data.gameStats.subLegendaryPokemonHatched = 0;
-      // biome-ignore lint/complexity/noForEach: <explanation>
       allSpecies
         .filter(s => s.subLegendary)
         .forEach(s => {
@@ -66,12 +71,15 @@ export const systemMigrators = [
       );
     }
   },
+};
 
-  /**
+/**
-   * Unlock all starters' first ability and female gender option.
+ * Unlock all starters' first ability and female gender option.
-   * @param data {@linkcode SystemSaveData}
+ * @param data - {@linkcode SystemSaveData}
-   */
+ */
-  function fixStarterData(data: SystemSaveData) {
+const fixStarterData: SystemSaveMigrator = {
+  version: "1.0.4",
+  migrate: (data: SystemSaveData): void => {
     if (!isNullOrUndefined(data.starterData)) {
       for (const starterId of defaultStarterSpecies) {
         if (data.starterData[starterId]?.abilityAttr) {
@@ -83,17 +91,22 @@ export const systemMigrators = [
       }
     }
   },
+};
+
+export const systemMigrators: Readonly<SystemSaveMigrator[]> = [
+  migrateAbilityData,
+  fixLegendaryStats,
+  fixStarterData,
 ] as const;
 
-export const settingsMigrators = [
+/**
-  /**
+ * Migrate from `REROLL_TARGET` property to {@linkcode SettingKeys.Shop_Cursor_Target}
-   * Migrate from "REROLL_TARGET" property to {@linkcode
+ * @param data - The `settings` object
-   * SettingKeys.Shop_Cursor_Target}.
+ */
-   * @param data the `settings` object
+const fixRerollTarget: SettingsSaveMigrator = {
-   */
+  version: "1.0.4",
-
+  // biome-ignore lint/complexity/noBannedTypes: TODO - refactor settings
-  // biome-ignore lint/complexity/noBannedTypes: TODO: fix the type to not be object...
+  migrate: (data: Object): void => {
-  function fixRerollTarget(data: Object) {
     if (data.hasOwnProperty("REROLL_TARGET") && !data.hasOwnProperty(SettingKeys.Shop_Cursor_Target)) {
       data[SettingKeys.Shop_Cursor_Target] = data["REROLL_TARGET"];
       // biome-ignore lint/performance/noDelete: intentional
@@ -101,16 +114,20 @@ export const settingsMigrators = [
       localStorage.setItem("settings", JSON.stringify(data));
     }
   },
-] as const;
+};
 
-export const sessionMigrators = [
+export const settingsMigrators: Readonly<SettingsSaveMigrator[]> = [fixRerollTarget] as const;
-  /**
+
-   *  Converts old lapsing modifiers (battle items, lures, and Dire Hit) and
+/**
-   *  other miscellaneous modifiers (vitamins, White Herb) to any new class
+ *  Converts old lapsing modifiers (battle items, lures, and Dire Hit) and
-   *  names and/or change in reload arguments.
+ *  other miscellaneous modifiers (vitamins, White Herb) to any new class
-   *  @param data {@linkcode SessionSaveData}
+ *  names and/or change in reload arguments.
-   */
+ *  @param data - {@linkcode SessionSaveData}
-  function migrateModifiers(data: SessionSaveData) {
+ */
+const migrateModifiers: SessionSaveMigrator = {
+  version: "1.0.4",
+  // biome-ignore lint/complexity/noExcessiveCognitiveComplexity: necessary?
+  migrate: (data: SessionSaveData): void => {
     for (const m of data.modifiers) {
       if (m.className === "PokemonBaseStatModifier") {
         m.className = "BaseStatModifier";
@@ -163,12 +180,11 @@ export const sessionMigrators = [
       }
     }
   },
-  /**
+};
-   *  Converts old Pokemon natureOverride and mysteryEncounterData
+
-   *  to use the new conjoined {@linkcode Pokemon.customPokemonData} structure instead.
+const migrateCustomPokemonData: SessionSaveMigrator = {
-   *  @param data {@linkcode SessionSaveData}
+  version: "1.0.4",
-   */
+  migrate: (data: SessionSaveData): void => {
-  function migrateCustomPokemonDataAndNatureOverrides(data: SessionSaveData) {
     // Fix Pokemon nature overrides and custom data migration
     for (const pokemon of data.party) {
       if (pokemon["mysteryEncounterPokemonData"]) {
@@ -186,4 +202,6 @@ export const sessionMigrators = [
       }
     }
   },
-] as const;
+};
+
+export const sessionMigrators: Readonly<SessionSaveMigrator[]> = [migrateModifiers, migrateCustomPokemonData] as const;

src/system/version_migration/versions/v1_1_0.ts

@@ -1,5 +0,0 @@
-export const systemMigrators = [] as const;
-
-export const settingsMigrators = [] as const;
-
-export const sessionMigrators = [] as const;

src/system/version_migration/versions/v1_7_0.ts

@@ -1,15 +1,18 @@
+import type { SessionSaveMigrator } from "#app/@types/SessionSaveMigrator";
+import type { SystemSaveMigrator } from "#app/@types/SystemSaveMigrator";
 import { getPokemonSpecies, getPokemonSpeciesForm } from "#app/data/pokemon-species";
 import { globalScene } from "#app/global-scene";
 import { DexAttr, type SessionSaveData, type SystemSaveData } from "#app/system/game-data";
-import * as Utils from "#app/utils";
+import { isNullOrUndefined } from "#app/utils";
 
-export const systemMigrators = [
+/**
-  /**
+ * If a starter is caught, but the only forms registered as caught are not starterSelectable,
-   * If a starter is caught, but the only forms registered as caught are not starterSelectable,
+ * unlock the default form.
-   * unlock the default form.
+ * @param data - {@linkcode SystemSaveData}
-   * @param data {@linkcode SystemSaveData}
+ */
-   */
+const migrateUnselectableForms: SystemSaveMigrator = {
-  function migrateUnselectableForms(data: SystemSaveData) {
+  version: "1.7.0",
+  migrate: (data: SystemSaveData): void => {
     if (data.starterData && data.dexData) {
       Object.keys(data.starterData).forEach(sd => {
         const caughtAttr = data.dexData[sd]?.caughtAttr;
@@ -30,12 +33,13 @@ export const systemMigrators = [
       });
     }
   },
-] as const;
+};
 
-export const settingsMigrators = [] as const;
+export const systemMigrators: Readonly<SystemSaveMigrator[]> = [migrateUnselectableForms] as const;
 
-export const sessionMigrators = [
+const migrateTera: SessionSaveMigrator = {
-  function migrateTera(data: SessionSaveData) {
+  version: "1.7.0",
+  migrate: (data: SessionSaveData): void => {
     for (let i = 0; i < data.modifiers.length; ) {
       if (data.modifiers[i].className === "TerastallizeModifier") {
         data.party.forEach(p => {
@@ -63,15 +67,17 @@ export const sessionMigrators = [
     }
 
     data.party.forEach(p => {
-      if (Utils.isNullOrUndefined(p.teraType)) {
+      if (isNullOrUndefined(p.teraType)) {
         p.teraType = getPokemonSpeciesForm(p.species, p.formIndex).type1;
       }
     });
 
     data.enemyParty.forEach(p => {
-      if (Utils.isNullOrUndefined(p.teraType)) {
+      if (isNullOrUndefined(p.teraType)) {
         p.teraType = getPokemonSpeciesForm(p.species, p.formIndex).type1;
       }
     });
   },
-] as const;
+};
+
+export const sessionMigrators: Readonly<SessionSaveMigrator[]> = [migrateTera] as const;

src/system/version_migration/versions/v1_8_3.ts

@@ -1,14 +1,16 @@
+import type { SystemSaveMigrator } from "#app/@types/SystemSaveMigrator";
 import { getPokemonSpecies } from "#app/data/pokemon-species";
 import { DexAttr, type SystemSaveData } from "#app/system/game-data";
 import { Species } from "#enums/species";
 
-export const systemMigrators = [
+/**
-  /**
+ * If a starter is caught, but the only forms registered as caught are not starterSelectable,
-   * If a starter is caught, but the only forms registered as caught are not starterSelectable,
+ * unlock the default form.
-   * unlock the default form.
+ * @param data - {@linkcode SystemSaveData}
-   * @param data {@linkcode SystemSaveData}
+ */
-   */
+const migratePichuForms: SystemSaveMigrator = {
-  function migratePichuForms(data: SystemSaveData) {
+  version: "1.8.3",
+  migrate: (data: SystemSaveData): void => {
     if (data.starterData && data.dexData) {
       // This is Pichu's Pokédex number
       const sd = 172;
@@ -23,8 +25,6 @@ export const systemMigrators = [
       }
     }
   },
-] as const;
+};
 
-export const settingsMigrators = [] as const;
+export const systemMigrators: Readonly<SystemSaveMigrator[]> = [migratePichuForms] as const;
-
-export const sessionMigrators = [] as const;

test/abilities/immunity.test.ts

@@ -0,0 +1,51 @@
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import { StatusEffect } from "#enums/status-effect";
+import GameManager from "#test/testUtils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Immunity", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should remove poison when gained", async () => {
+    game.override.ability(Abilities.IMMUNITY)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .moveset(Moves.SKILL_SWAP)
+      .enemyMoveset(Moves.SPLASH),
+
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+    const enemy = game.scene.getEnemyPokemon();
+    enemy?.trySetStatus(StatusEffect.POISON);
+    expect(enemy?.status?.effect).toBe(StatusEffect.POISON);
+
+    game.move.select(Moves.SKILL_SWAP);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemy?.status).toBeNull();
+  });
+});

test/abilities/insomnia.test.ts

@@ -0,0 +1,51 @@
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import { StatusEffect } from "#enums/status-effect";
+import GameManager from "#test/testUtils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Insomnia", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should remove sleep when gained", async () => {
+    game.override.ability(Abilities.INSOMNIA)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .moveset(Moves.SKILL_SWAP)
+      .enemyMoveset(Moves.SPLASH),
+
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+    const enemy = game.scene.getEnemyPokemon();
+    enemy?.trySetStatus(StatusEffect.SLEEP);
+    expect(enemy?.status?.effect).toBe(StatusEffect.SLEEP);
+
+    game.move.select(Moves.SKILL_SWAP);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemy?.status).toBeNull();
+  });
+});

test/abilities/limber.test.ts

@@ -0,0 +1,51 @@
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import { StatusEffect } from "#enums/status-effect";
+import GameManager from "#test/testUtils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Limber", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should remove paralysis when gained", async () => {
+    game.override.ability(Abilities.LIMBER)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .moveset(Moves.SKILL_SWAP)
+      .enemyMoveset(Moves.SPLASH),
+
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+    const enemy = game.scene.getEnemyPokemon();
+    enemy?.trySetStatus(StatusEffect.PARALYSIS);
+    expect(enemy?.status?.effect).toBe(StatusEffect.PARALYSIS);
+
+    game.move.select(Moves.SKILL_SWAP);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemy?.status).toBeNull();
+  });
+});

test/abilities/magma_armor.test.ts

@@ -0,0 +1,51 @@
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import { StatusEffect } from "#enums/status-effect";
+import GameManager from "#test/testUtils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Magma Armor", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should remove freeze when gained", async () => {
+    game.override.ability(Abilities.MAGMA_ARMOR)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .moveset(Moves.SKILL_SWAP)
+      .enemyMoveset(Moves.SPLASH),
+
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+    const enemy = game.scene.getEnemyPokemon();
+    enemy?.trySetStatus(StatusEffect.FREEZE);
+    expect(enemy?.status?.effect).toBe(StatusEffect.FREEZE);
+
+    game.move.select(Moves.SKILL_SWAP);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemy?.status).toBeNull();
+  });
+});

test/abilities/oblivious.test.ts

@@ -0,0 +1,69 @@
+import { Abilities } from "#enums/abilities";
+import { BattlerTagType } from "#enums/battler-tag-type";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import GameManager from "#test/testUtils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
+
+describe("Abilities - Oblivious", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should remove taunt when gained", async () => {
+    game.override.ability(Abilities.OBLIVIOUS)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .moveset(Moves.SKILL_SWAP)
+      .enemyMoveset(Moves.SPLASH),
+
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+    const enemy = game.scene.getEnemyPokemon();
+    enemy?.addTag(BattlerTagType.TAUNT);
+    expect(enemy?.getTag(BattlerTagType.TAUNT)).toBeTruthy();
+
+    game.move.select(Moves.SKILL_SWAP);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemy?.getTag(BattlerTagType.TAUNT)).toBeFalsy();
+  });
+
+  it("should remove infatuation when gained", async () => {
+    game.override.ability(Abilities.OBLIVIOUS)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .moveset(Moves.SKILL_SWAP)
+      .enemyMoveset(Moves.SPLASH),
+
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+    const enemy = game.scene.getEnemyPokemon();
+    vi.spyOn(enemy!, "isOppositeGender").mockReturnValue(true);
+    enemy?.addTag(BattlerTagType.INFATUATED, 5, Moves.JUDGMENT, game.scene.getPlayerPokemon()?.id); // sourceID needs to be defined
+    expect(enemy?.getTag(BattlerTagType.INFATUATED)).toBeTruthy();
+
+    game.move.select(Moves.SKILL_SWAP);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemy?.getTag(BattlerTagType.INFATUATED)).toBeFalsy();
+  });
+});

test/abilities/own_tempo.test.ts

@@ -0,0 +1,51 @@
+import { Abilities } from "#enums/abilities";
+import { BattlerTagType } from "#enums/battler-tag-type";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import GameManager from "#test/testUtils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Own Tempo", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should remove confusion when gained", async () => {
+    game.override.ability(Abilities.OWN_TEMPO)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .moveset(Moves.SKILL_SWAP)
+      .enemyMoveset(Moves.SPLASH),
+
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+    const enemy = game.scene.getEnemyPokemon();
+    enemy?.addTag(BattlerTagType.CONFUSED);
+    expect(enemy?.getTag(BattlerTagType.CONFUSED)).toBeTruthy();
+
+    game.move.select(Moves.SKILL_SWAP);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemy?.getTag(BattlerTagType.CONFUSED)).toBeFalsy();
+  });
+});

test/abilities/super_luck.test.ts

@@ -0,0 +1,43 @@
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import GameManager from "#test/testUtils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
+
+describe("Abilities - Super Luck", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([Moves.TACKLE])
+      .ability(Abilities.SUPER_LUCK)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should increase the crit stage of a user by 1", async () => {
+    await game.classicMode.startBattle([Species.MAGIKARP]);
+    const enemy = game.scene.getEnemyPokemon()!;
+    const fn = vi.spyOn(enemy, "getCritStage");
+    game.move.select(Moves.TACKLE);
+    await game.phaseInterceptor.to("BerryPhase");
+    expect(fn).toHaveReturnedWith(1);
+    fn.mockRestore();
+  });
+});

test/abilities/thermal_exchange.test.ts

@@ -0,0 +1,51 @@
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import { StatusEffect } from "#enums/status-effect";
+import GameManager from "#test/testUtils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Thermal Exchange", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should remove burn when gained", async () => {
+    game.override.ability(Abilities.THERMAL_EXCHANGE)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .moveset(Moves.SKILL_SWAP)
+      .enemyMoveset(Moves.SPLASH),
+
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+    const enemy = game.scene.getEnemyPokemon();
+    enemy?.trySetStatus(StatusEffect.BURN);
+    expect(enemy?.status?.effect).toBe(StatusEffect.BURN);
+
+    game.move.select(Moves.SKILL_SWAP);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemy?.status).toBeNull();
+  });
+});

test/abilities/vital_spirit.test.ts

@@ -0,0 +1,51 @@
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import { StatusEffect } from "#enums/status-effect";
+import GameManager from "#test/testUtils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Vital Spirit", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should remove sleep when gained", async () => {
+    game.override.ability(Abilities.INSOMNIA)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .moveset(Moves.SKILL_SWAP)
+      .enemyMoveset(Moves.SPLASH),
+
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+    const enemy = game.scene.getEnemyPokemon();
+    enemy?.trySetStatus(StatusEffect.SLEEP);
+    expect(enemy?.status?.effect).toBe(StatusEffect.SLEEP);
+
+    game.move.select(Moves.SKILL_SWAP);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemy?.status).toBeNull();
+  });
+});

test/abilities/water_bubble.test.ts

@@ -0,0 +1,51 @@
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import { StatusEffect } from "#enums/status-effect";
+import GameManager from "#test/testUtils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Water Bubble", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should remove burn when gained", async () => {
+    game.override.ability(Abilities.THERMAL_EXCHANGE)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .moveset(Moves.SKILL_SWAP)
+      .enemyMoveset(Moves.SPLASH),
+
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+    const enemy = game.scene.getEnemyPokemon();
+    enemy?.trySetStatus(StatusEffect.BURN);
+    expect(enemy?.status?.effect).toBe(StatusEffect.BURN);
+
+    game.move.select(Moves.SKILL_SWAP);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemy?.status).toBeNull();
+  });
+});

test/abilities/water_veil.test.ts

@@ -0,0 +1,51 @@
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import { StatusEffect } from "#enums/status-effect";
+import GameManager from "#test/testUtils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Abilities - Water Veil", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.SPLASH ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should remove burn when gained", async () => {
+    game.override.ability(Abilities.THERMAL_EXCHANGE)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .moveset(Moves.SKILL_SWAP)
+      .enemyMoveset(Moves.SPLASH),
+
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+    const enemy = game.scene.getEnemyPokemon();
+    enemy?.trySetStatus(StatusEffect.BURN);
+    expect(enemy?.status?.effect).toBe(StatusEffect.BURN);
+
+    game.move.select(Moves.SKILL_SWAP);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(enemy?.status).toBeNull();
+  });
+});

test/moves/spikes.test.ts

@@ -4,6 +4,7 @@ import { Species } from "#enums/species";
 import GameManager from "#test/testUtils/gameManager";
 import Phaser from "phaser";
 import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+import { ArenaTagSide, ArenaTrapTag } from "#app/data/arena-tag";
 
 describe("Moves - Spikes", () => {
   let phaserGame: Phaser.Game;
@@ -77,4 +78,17 @@ describe("Moves - Spikes", () => {
     const enemy = game.scene.getEnemyParty()[0];
     expect(enemy.hp).toBeLessThan(enemy.getMaxHp());
   }, 20000);
+
+  it("should work when all targets fainted", async () => {
+    game.override.enemySpecies(Species.DIGLETT);
+    game.override.battleType("double");
+    game.override.startingLevel(50);
+    await game.classicMode.startBattle([Species.RAYQUAZA, Species.ROWLET]);
+
+    game.move.select(Moves.EARTHQUAKE);
+    game.move.select(Moves.SPIKES, 1);
+    await game.phaseInterceptor.to("TurnEndPhase");
+
+    expect(game.scene.arena.getTagOnSide(ArenaTrapTag, ArenaTagSide.ENEMY)).toBeDefined();
+  }, 20000);
 });