diff --git a/src/field/pokemon-held-item-manager.ts b/src/field/pokemon-held-item-manager.ts
index bd6133551bf..c30b660c855 100644
--- a/src/field/pokemon-held-item-manager.ts
+++ b/src/field/pokemon-held-item-manager.ts
@@ -1,22 +1,7 @@
 import { allHeldItems } from "#app/items/all-held-items";
 import { isItemInRequested, type HeldItemCategoryId, type HeldItemId } from "#app/enums/held-item-id";
 import type { FormChangeItem } from "#enums/form-change-item";
-import type { BASE_STAT_TOTAL_DATA } from "#app/items/held-items/base-stat-total";
-import type { BASE_STAT_FLAT_DATA } from "#app/items/held-items/base-stat-flat";
-
-type HELD_ITEM_DATA = BASE_STAT_TOTAL_DATA | BASE_STAT_FLAT_DATA;
-
-interface HeldItemProperties {
-  stack: number;
-  disabled?: boolean;
-  unstealable?: boolean; //TODO: ensure this is taken into account by stealing effects
-  cooldown?: number;
-  data?: HELD_ITEM_DATA;
-}
-
-export type HeldItemPropertyMap = {
-  [key in HeldItemId]?: HeldItemProperties;
-};
+import { isHeldItemSpecs, type HeldItemDataMap, type HeldItemSpecs } from "#app/items/held-item-data-types";
 
 interface FormChangeItemProperties {
   active: boolean;
@@ -27,7 +12,7 @@ export type FormChangeItemPropertyMap = {
 };
 
 export class PokemonItemManager {
-  public heldItems: HeldItemPropertyMap;
+  public heldItems: HeldItemDataMap;
   public formChangeItems: FormChangeItemPropertyMap;
 
   constructor() {
@@ -61,14 +46,6 @@ export class PokemonItemManager {
     return itemType in this.heldItems;
   }
 
-  /*
-  getItem(itemType: HeldItemId): HeldItemProperties {
-    if (itemType in this.heldItems) {
-      return this.heldItems[itemType];
-    }
-  }
-*/
-
   getStack(itemType: HeldItemId): number {
     const item = this.heldItems[itemType];
     return item ? item.stack : 0;
@@ -79,7 +56,7 @@ export class PokemonItemManager {
     return item ? item.stack >= allHeldItems[itemType].getMaxStackCount() : false;
   }
 
-  overrideItems(newItems: HeldItemPropertyMap) {
+  overrideItems(newItems: HeldItemDataMap) {
     this.heldItems = newItems;
     // The following is to allow randomly generated item configs to have stack 0
     for (const [item, properties] of Object.entries(this.heldItems)) {
@@ -89,7 +66,11 @@ export class PokemonItemManager {
     }
   }
 
-  add(itemType: HeldItemId, addStack = 1, data?: HELD_ITEM_DATA): boolean {
+  add(itemType: HeldItemId | HeldItemSpecs, addStack = 1): boolean {
+    if (isHeldItemSpecs(itemType)) {
+      return this.addItemWithSpecs(itemType);
+    }
+
     const maxStack = allHeldItems[itemType].getMaxStackCount();
     const item = this.heldItems[itemType];
 
@@ -100,12 +81,25 @@ export class PokemonItemManager {
         return true;
       }
     } else {
-      this.heldItems[itemType] = { stack: Math.min(addStack, maxStack), disabled: false, data: data };
+      this.heldItems[itemType] = { stack: Math.min(addStack, maxStack) };
       return true;
     }
     return false;
   }
 
+  addItemWithSpecs(itemSpecs: HeldItemSpecs): boolean {
+    const id = itemSpecs.id;
+    const maxStack = allHeldItems[id].getMaxStackCount();
+    const item = this.heldItems[id];
+
+    const tempStack = item?.stack ?? 0;
+
+    this.heldItems[id] = itemSpecs;
+    this.heldItems[id].stack = Math.min(itemSpecs.stack + tempStack, maxStack);
+
+    return true;
+  }
+
   remove(itemType: HeldItemId, removeStack = 1, all = false) {
     const item = this.heldItems[itemType];
 
diff --git a/src/items/held-item-data-types.ts b/src/items/held-item-data-types.ts
new file mode 100644
index 00000000000..ff291b04282
--- /dev/null
+++ b/src/items/held-item-data-types.ts
@@ -0,0 +1,69 @@
+import type Pokemon from "#app/field/pokemon";
+import type { HeldItemCategoryId, HeldItemId } from "#enums/held-item-id";
+import type { RewardTier } from "#enums/reward-tier";
+import type { Stat } from "#enums/stat";
+
+export interface BASE_STAT_TOTAL_DATA {
+  statModifier: number;
+}
+
+export interface BASE_STAT_FLAT_DATA {
+  statModifier: number;
+  stats: Stat[];
+}
+
+export type HeldItemExtraData = BASE_STAT_TOTAL_DATA | BASE_STAT_FLAT_DATA;
+
+export type HeldItemData = {
+  stack: number;
+  disabled?: boolean;
+  unstealable?: boolean;
+  cooldown?: number;
+  data?: HeldItemExtraData;
+};
+
+export type HeldItemDataMap = {
+  [key in HeldItemId]?: HeldItemData;
+};
+
+export type HeldItemSpecs = HeldItemData & {
+  id: HeldItemId;
+};
+
+export function isHeldItemSpecs(entry: any): entry is HeldItemSpecs {
+  return typeof entry.id === "number" && "stack" in entry;
+}
+
+export type HeldItemWeights = {
+  [key in HeldItemId]?: number;
+};
+
+export type HeldItemWeightFunc = (party: Pokemon[]) => number;
+
+export type HeldItemCategoryEntry = HeldItemData & {
+  id: HeldItemCategoryId;
+  customWeights?: HeldItemWeights;
+};
+
+export function isHeldItemCategoryEntry(entry: any): entry is HeldItemCategoryEntry {
+  return isHeldItemCategoryEntry(entry.id) && "customWeights" in entry;
+}
+
+type HeldItemPoolEntry = {
+  entry: HeldItemId | HeldItemCategoryEntry | HeldItemSpecs;
+  weight: number | HeldItemWeightFunc;
+};
+
+export type HeldItemPool = HeldItemPoolEntry[];
+
+export type HeldItemTieredPool = {
+  [key in RewardTier]?: HeldItemPool;
+};
+
+type HeldItemConfigurationEntry = {
+  entry: HeldItemId | HeldItemCategoryEntry | HeldItemSpecs | HeldItemPool;
+  count?: number | (() => number);
+  excluded?: HeldItemId[];
+};
+
+export type HeldItemConfiguration = HeldItemConfigurationEntry[];
diff --git a/src/items/held-item-pool.ts b/src/items/held-item-pool.ts
index 196f2121325..ab778d68f74 100644
--- a/src/items/held-item-pool.ts
+++ b/src/items/held-item-pool.ts
@@ -1,110 +1,157 @@
-/*
 import type { PlayerPokemon } from "#app/field/pokemon";
-import { randSeedInt } from "#app/utils/common";
-import { HeldItemCategoryId, HeldItemId, isCategoryId } from "#enums/held-item-id";
+import type Pokemon from "#app/field/pokemon";
+import { coerceArray, getEnumValues, randSeedFloat, randSeedInt } from "#app/utils/common";
+import { BerryType } from "#enums/berry-type";
+import { HeldItemCategoryId, HeldItemId } from "#enums/held-item-id";
+import type { PokemonType } from "#enums/pokemon-type";
 import { RewardTier } from "#enums/reward-tier";
+import { PERMANENT_STATS } from "#enums/stat";
+import {
+  type HeldItemPool,
+  type HeldItemSpecs,
+  type HeldItemTieredPool,
+  type HeldItemWeights,
+  isHeldItemCategoryEntry,
+} from "./held-item-data-types";
+import { attackTypeToHeldItem } from "./held-items/attack-type-booster";
+import { permanentStatToHeldItem } from "./held-items/base-stat-booster";
+import { berryTypeToHeldItem } from "./held-items/berry";
 
-interface HeldItemPoolEntry {
-  weight: number;
-  item: HeldItemId | HeldItemCategoryId;
-}
+export const wildHeldItemPool: HeldItemTieredPool = {};
 
-export type HeldItemPool = {
-  [key in RewardTier]?: HeldItemPoolEntry[];
-};
+export const trainerHeldItemPool: HeldItemTieredPool = {};
 
-const dailyStarterHeldItemPool: HeldItemPool = {
-  [RewardTier.COMMON]: [
-    { item: HeldItemCategoryId.BASE_STAT_BOOST, weight: 1 },
-    { item: HeldItemCategoryId.BERRY, weight: 3 },
-  ],
-  [RewardTier.GREAT]: [{ item: HeldItemCategoryId.TYPE_ATTACK_BOOSTER, weight: 5 }],
-  [RewardTier.ULTRA]: [
-    { item: HeldItemId.REVIVER_SEED, weight: 4 },
-    { item: HeldItemId.SOOTHE_BELL, weight: 1 },
-    { item: HeldItemId.SOUL_DEW, weight: 1 },
-    { item: HeldItemId.GOLDEN_PUNCH, weight: 1 },
-  ],
-  [RewardTier.ROGUE]: [
-    { item: HeldItemId.GRIP_CLAW, weight: 5 },
-    { item: HeldItemId.BATON, weight: 2 },
-    { item: HeldItemId.FOCUS_BAND, weight: 5 },
-    { item: HeldItemId.QUICK_CLAW, weight: 3 },
-    { item: HeldItemId.KINGS_ROCK, weight: 3 },
-  ],
-  [RewardTier.MASTER]: [
-    { item: HeldItemId.LEFTOVERS, weight: 1 },
-    { item: HeldItemId.SHELL_BELL, weight: 1 },
-  ],
-};
+export const dailyStarterHeldItemPool: HeldItemTieredPool = {};
 
-export function getDailyRunStarterHeldItems(party: PlayerPokemon[]): PokemonHeldItemModifier[] {
-  const ret: HeldItemId[] = [];
+export function getDailyRunStarterHeldItems(party: PlayerPokemon[]) {
   for (const p of party) {
     for (let m = 0; m < 3; m++) {
       const tierValue = randSeedInt(64);
 
-      let tier: RewardTier;
-      if (tierValue > 25) {
-        tier = RewardTier.COMMON;
-      } else if (tierValue > 12) {
-        tier = RewardTier.GREAT;
-      } else if (tierValue > 4) {
-        tier = RewardTier.ULTRA;
-      } else if (tierValue) {
-        tier = RewardTier.ROGUE;
-      } else {
-        tier = RewardTier.MASTER;
-      }
+      const tier = getDailyRewardTier(tierValue);
 
-      const item = getNewHeldItemFromPool(party, dailyStarterHeldItemPool, tier);
-      ret.push(item);
+      const item = getNewHeldItemFromPool(dailyStarterHeldItemPool[tier] as HeldItemPool, p);
+      p.heldItemManager.add(item);
     }
   }
-
-  return ret;
 }
 
-function getNewModifierTypeOption(
-  party: Pokemon[],
-  poolType: ModifierPoolType,
-  baseTier?: ModifierTier,
-  upgradeCount?: number,
-  retryCount = 0,
-  allowLuckUpgrades = true,
-): ModifierTypeOption | null {
-  const player = !poolType;
-  const pool = getModifierPoolForType(poolType);
-  const thresholds = getPoolThresholds(poolType);
+function getDailyRewardTier(tierValue: number): RewardTier {
+  if (tierValue > 25) {
+    return RewardTier.COMMON;
+  }
+  if (tierValue > 12) {
+    return RewardTier.GREAT;
+  }
+  if (tierValue > 4) {
+    return RewardTier.ULTRA;
+  }
+  if (tierValue > 0) {
+    return RewardTier.ROGUE;
+  }
+  return RewardTier.MASTER;
+}
 
-  const tier = determineTier(party, player, baseTier, upgradeCount, retryCount, allowLuckUpgrades);
+function pickWeightedIndex(weights: number[]): number {
+  const totalWeight = weights.reduce((sum, w) => sum + w, 0);
 
-  const tierThresholds = Object.keys(thresholds[tier]);
-  const totalWeight = Number.parseInt(tierThresholds[tierThresholds.length - 1]);
-  const value = randSeedInt(totalWeight);
-  let index: number | undefined;
-  for (const t of tierThresholds) {
-    const threshold = Number.parseInt(t);
-    if (value < threshold) {
-      index = thresholds[tier][threshold];
-      break;
-    }
+  if (totalWeight <= 0) {
+    throw new Error("Total weight must be greater than 0.");
   }
 
-  if (index === undefined) {
+  let r = randSeedFloat() * totalWeight;
+
+  for (let i = 0; i < weights.length; i++) {
+    if (r < weights[i]) {
+      return i;
+    }
+    r -= weights[i];
+  }
+
+  return -1; // TODO: Change to something more appropriate
+}
+
+export function getNewVitaminHeldItem(customWeights: HeldItemWeights = {}): HeldItemId {
+  const items = PERMANENT_STATS.map(s => permanentStatToHeldItem[s]);
+  const weights = items.map(t => customWeights[t] ?? t);
+  return items[pickWeightedIndex(weights)];
+}
+
+export function getNewBerryHeldItem(customWeights: HeldItemWeights = {}): HeldItemId {
+  const berryTypes = getEnumValues(BerryType);
+  const items = berryTypes.map(b => berryTypeToHeldItem[b]);
+
+  const weights = items.map(t =>
+    (customWeights[t] ?? (t === HeldItemId.SITRUS_BERRY || t === HeldItemId.LUM_BERRY || t === HeldItemId.LEPPA_BERRY))
+      ? 2
+      : 1,
+  );
+
+  return items[pickWeightedIndex(weights)];
+}
+
+export function getNewAttackTypeBoosterHeldItem(
+  pokemon: Pokemon | Pokemon[],
+  customWeights: HeldItemWeights = {},
+): HeldItemId | null {
+  const party = coerceArray(pokemon);
+
+  // TODO: make this consider moves or abilities that change types
+  const attackMoveTypes = party.flatMap(p =>
+    p
+      .getMoveset()
+      .filter(m => m.getMove().is("AttackMove"))
+      .map(m => m.getMove().type),
+  );
+  if (!attackMoveTypes.length) {
     return null;
   }
 
-  if (player) {
-    console.log(index, ignoredPoolIndexes[tier].filter(i => i <= index).length, ignoredPoolIndexes[tier]);
-  }
+  const attackMoveTypeWeights = attackMoveTypes.reduce((map, type) => {
+    const current = map.get(type) ?? 0;
+    if (current < 3) {
+      map.set(type, current + 1);
+    }
+    return map;
+  }, new Map<PokemonType, number>());
 
-  const item = pool[tier][index].item;
-  if (isCategoryId(item)) {
-    return getNewHeldItemCategoryOption(item);
-  }
-  return item;
+  const types = Array.from(attackMoveTypeWeights.keys());
 
-  //  console.log(modifierType, !player ? "(enemy)" : "");
+  const weights = types.map(type => customWeights[attackTypeToHeldItem[type]] ?? attackMoveTypeWeights.get(type)!);
+
+  const type = types[pickWeightedIndex(weights)];
+  return attackTypeToHeldItem[type];
+}
+
+export function getNewHeldItemFromCategory(
+  id: HeldItemCategoryId,
+  pokemon: Pokemon | Pokemon[],
+  customWeights: HeldItemWeights = {},
+): HeldItemId | null {
+  if (id === HeldItemCategoryId.BERRY) {
+    return getNewBerryHeldItem(customWeights);
+  }
+  if (id === HeldItemCategoryId.VITAMIN) {
+    return getNewVitaminHeldItem(customWeights);
+  }
+  if (id === HeldItemCategoryId.TYPE_ATTACK_BOOSTER) {
+    return getNewAttackTypeBoosterHeldItem(pokemon, customWeights);
+  }
+  return null;
+}
+
+function getNewHeldItemFromPool(pool: HeldItemPool, pokemon: Pokemon): HeldItemId | HeldItemSpecs {
+  const weights = pool.map(p => (typeof p.weight === "function" ? p.weight(coerceArray(pokemon)) : p.weight));
+
+  const entry = pool[pickWeightedIndex(weights)].entry;
+
+  if (typeof entry === "number") {
+    return entry as HeldItemId;
+  }
+
+  if (isHeldItemCategoryEntry(entry)) {
+    return getNewHeldItemFromCategory(entry.id, pokemon, entry?.customWeights) as HeldItemId;
+  }
+
+  return entry as HeldItemSpecs;
 }
-*/
diff --git a/src/items/held-items/base-stat-flat.ts b/src/items/held-items/base-stat-flat.ts
index 5144b392ad0..f191d8a06b9 100644
--- a/src/items/held-items/base-stat-flat.ts
+++ b/src/items/held-items/base-stat-flat.ts
@@ -1,7 +1,7 @@
 import type Pokemon from "#app/field/pokemon";
 import type { HeldItemId } from "#enums/held-item-id";
 import { HeldItem, ITEM_EFFECT } from "../held-item";
-import { getStatKey, type Stat } from "#enums/stat";
+import { getStatKey } from "#enums/stat";
 import i18next from "i18next";
 
 export interface BASE_STAT_FLAT_PARAMS {
@@ -11,11 +11,6 @@ export interface BASE_STAT_FLAT_PARAMS {
   baseStats: number[];
 }
 
-export interface BASE_STAT_FLAT_DATA {
-  statModifier: number;
-  stats: Stat[];
-}
-
 /**
  * Currently used by Old Gateau item
  */
diff --git a/src/items/held-items/base-stat-total.ts b/src/items/held-items/base-stat-total.ts
index 59bc10e3cc3..f5c57c6a685 100644
--- a/src/items/held-items/base-stat-total.ts
+++ b/src/items/held-items/base-stat-total.ts
@@ -1,6 +1,7 @@
 import type Pokemon from "#app/field/pokemon";
 import i18next from "i18next";
 import { HeldItem, ITEM_EFFECT } from "../held-item";
+import type { BASE_STAT_TOTAL_DATA } from "../held-item-data";
 
 export interface BASE_STAT_TOTAL_PARAMS {
   /** The pokemon with the item */
@@ -9,10 +10,6 @@ export interface BASE_STAT_TOTAL_PARAMS {
   baseStats: number[];
 }
 
-export interface BASE_STAT_TOTAL_DATA {
-  statModifier: number;
-}
-
 /**
  * Currently used by Shuckle Juice item
  */
diff --git a/src/items/init-held-item-pools.ts b/src/items/init-held-item-pools.ts
new file mode 100644
index 00000000000..0e6dc7b99e6
--- /dev/null
+++ b/src/items/init-held-item-pools.ts
@@ -0,0 +1,80 @@
+import { HeldItemCategoryId, HeldItemId } from "#enums/held-item-id";
+import { RewardTier } from "#enums/reward-tier";
+import { dailyStarterHeldItemPool, trainerHeldItemPool, wildHeldItemPool } from "./held-item-pool";
+
+/**
+ * Initialize the wild held item pool
+ */
+function initWildHeldItemPool() {
+  wildHeldItemPool[RewardTier.COMMON] = [{ entry: HeldItemCategoryId.BERRY, weight: 1 }];
+  wildHeldItemPool[RewardTier.GREAT] = [{ entry: HeldItemCategoryId.BASE_STAT_BOOST, weight: 1 }];
+  wildHeldItemPool[RewardTier.ULTRA] = [
+    { entry: HeldItemCategoryId.TYPE_ATTACK_BOOSTER, weight: 5 },
+    { entry: HeldItemId.WHITE_HERB, weight: 0 },
+  ];
+  wildHeldItemPool[RewardTier.ROGUE] = [{ entry: HeldItemId.LUCKY_EGG, weight: 4 }];
+  wildHeldItemPool[RewardTier.MASTER] = [{ entry: HeldItemId.GOLDEN_EGG, weight: 1 }];
+}
+
+/**
+ * Initialize the trainer pokemon held item pool
+ */
+function initTrainerHeldItemPool() {
+  trainerHeldItemPool[RewardTier.COMMON] = [
+    { entry: HeldItemCategoryId.BERRY, weight: 8 },
+    { entry: HeldItemCategoryId.BASE_STAT_BOOST, weight: 3 },
+  ];
+  trainerHeldItemPool[RewardTier.GREAT] = [{ entry: HeldItemCategoryId.BASE_STAT_BOOST, weight: 3 }];
+  trainerHeldItemPool[RewardTier.ULTRA] = [
+    { entry: HeldItemCategoryId.TYPE_ATTACK_BOOSTER, weight: 10 },
+    { entry: HeldItemId.WHITE_HERB, weight: 0 },
+  ];
+  trainerHeldItemPool[RewardTier.ROGUE] = [
+    { entry: HeldItemId.FOCUS_BAND, weight: 2 },
+    { entry: HeldItemId.LUCKY_EGG, weight: 4 },
+    { entry: HeldItemId.QUICK_CLAW, weight: 1 },
+    { entry: HeldItemId.GRIP_CLAW, weight: 1 },
+    { entry: HeldItemId.WIDE_LENS, weight: 1 },
+  ];
+  trainerHeldItemPool[RewardTier.MASTER] = [
+    { entry: HeldItemId.KINGS_ROCK, weight: 1 },
+    { entry: HeldItemId.LEFTOVERS, weight: 1 },
+    { entry: HeldItemId.SHELL_BELL, weight: 1 },
+    { entry: HeldItemId.SCOPE_LENS, weight: 1 },
+  ];
+}
+
+/**
+ * Initialize the daily starter held item pool
+ */
+function initDailyStarterModifierPool() {
+  dailyStarterHeldItemPool[RewardTier.COMMON] = [
+    { entry: HeldItemCategoryId.BASE_STAT_BOOST, weight: 1 },
+    { entry: HeldItemCategoryId.BERRY, weight: 3 },
+  ];
+  dailyStarterHeldItemPool[RewardTier.GREAT] = [{ entry: HeldItemCategoryId.TYPE_ATTACK_BOOSTER, weight: 5 }];
+  dailyStarterHeldItemPool[RewardTier.ULTRA] = [
+    { entry: HeldItemId.REVIVER_SEED, weight: 4 },
+    { entry: HeldItemId.SOOTHE_BELL, weight: 1 },
+    { entry: HeldItemId.SOUL_DEW, weight: 1 },
+    { entry: HeldItemId.GOLDEN_PUNCH, weight: 1 },
+  ];
+  dailyStarterHeldItemPool[RewardTier.ROGUE] = [
+    { entry: HeldItemId.GRIP_CLAW, weight: 5 },
+    { entry: HeldItemId.BATON, weight: 2 },
+    { entry: HeldItemId.FOCUS_BAND, weight: 5 },
+    { entry: HeldItemId.QUICK_CLAW, weight: 3 },
+    { entry: HeldItemId.KINGS_ROCK, weight: 3 },
+  ];
+  dailyStarterHeldItemPool[RewardTier.MASTER] = [
+    { entry: HeldItemId.LEFTOVERS, weight: 1 },
+    { entry: HeldItemId.SHELL_BELL, weight: 1 },
+  ];
+}
+
+export function initHeldItemPools() {
+  // Default held item pools for specific scenarios
+  initWildHeldItemPool();
+  initTrainerHeldItemPool();
+  initDailyStarterModifierPool();
+}
diff --git a/src/modifier/init-modifier-pools.ts b/src/modifier/init-modifier-pools.ts
index 60697333600..3d558097d78 100644
--- a/src/modifier/init-modifier-pools.ts
+++ b/src/modifier/init-modifier-pools.ts
@@ -1,11 +1,5 @@
 import type Pokemon from "#app/field/pokemon";
-import {
-  dailyStarterModifierPool,
-  enemyBuffModifierPool,
-  modifierPool,
-  trainerModifierPool,
-  wildModifierPool,
-} from "#app/modifier/modifier-pools";
+import { enemyBuffModifierPool, modifierPool } from "#app/modifier/modifier-pools";
 import { globalScene } from "#app/global-scene";
 import { DoubleBattleChanceBoosterModifier, SpeciesCritBoosterModifier, TurnStatusEffectModifier } from "./modifier";
 import { WeightedModifierType } from "./modifier-type";
@@ -27,35 +21,6 @@ import { MAX_PER_TYPE_POKEBALLS } from "#app/data/pokeball";
 // biome-ignore lint/correctness/noUnusedImports: This is used in a tsdoc comment
 import type { initModifierTypes } from "./modifier-type";
 
-/**
- * Initialize the wild modifier pool
- */
-function initWildModifierPool() {
-  wildModifierPool[ModifierTier.COMMON] = [new WeightedModifierType(modifierTypes.BERRY, 1)].map(m => {
-    m.setTier(ModifierTier.COMMON);
-    return m;
-  });
-  wildModifierPool[ModifierTier.GREAT] = [new WeightedModifierType(modifierTypes.BASE_STAT_BOOSTER, 1)].map(m => {
-    m.setTier(ModifierTier.GREAT);
-    return m;
-  });
-  wildModifierPool[ModifierTier.ULTRA] = [
-    new WeightedModifierType(modifierTypes.ATTACK_TYPE_BOOSTER, 10),
-    new WeightedModifierType(modifierTypes.WHITE_HERB, 0),
-  ].map(m => {
-    m.setTier(ModifierTier.ULTRA);
-    return m;
-  });
-  wildModifierPool[ModifierTier.ROGUE] = [new WeightedModifierType(modifierTypes.LUCKY_EGG, 4)].map(m => {
-    m.setTier(ModifierTier.ROGUE);
-    return m;
-  });
-  wildModifierPool[ModifierTier.MASTER] = [new WeightedModifierType(modifierTypes.GOLDEN_EGG, 1)].map(m => {
-    m.setTier(ModifierTier.MASTER);
-    return m;
-  });
-}
-
 /**
  * Initialize the common modifier pool
  */
@@ -649,46 +614,6 @@ function initMasterModifierPool() {
   });
 }
 
-function initTrainerModifierPool() {
-  trainerModifierPool[ModifierTier.COMMON] = [
-    new WeightedModifierType(modifierTypes.BERRY, 8),
-    new WeightedModifierType(modifierTypes.BASE_STAT_BOOSTER, 3),
-  ].map(m => {
-    m.setTier(ModifierTier.COMMON);
-    return m;
-  });
-  trainerModifierPool[ModifierTier.GREAT] = [new WeightedModifierType(modifierTypes.BASE_STAT_BOOSTER, 3)].map(m => {
-    m.setTier(ModifierTier.GREAT);
-    return m;
-  });
-  trainerModifierPool[ModifierTier.ULTRA] = [
-    new WeightedModifierType(modifierTypes.ATTACK_TYPE_BOOSTER, 10),
-    new WeightedModifierType(modifierTypes.WHITE_HERB, 0),
-  ].map(m => {
-    m.setTier(ModifierTier.ULTRA);
-    return m;
-  });
-  trainerModifierPool[ModifierTier.ROGUE] = [
-    new WeightedModifierType(modifierTypes.FOCUS_BAND, 2),
-    new WeightedModifierType(modifierTypes.LUCKY_EGG, 4),
-    new WeightedModifierType(modifierTypes.QUICK_CLAW, 1),
-    new WeightedModifierType(modifierTypes.GRIP_CLAW, 1),
-    new WeightedModifierType(modifierTypes.WIDE_LENS, 1),
-  ].map(m => {
-    m.setTier(ModifierTier.ROGUE);
-    return m;
-  });
-  trainerModifierPool[ModifierTier.MASTER] = [
-    new WeightedModifierType(modifierTypes.KINGS_ROCK, 1),
-    new WeightedModifierType(modifierTypes.LEFTOVERS, 1),
-    new WeightedModifierType(modifierTypes.SHELL_BELL, 1),
-    new WeightedModifierType(modifierTypes.SCOPE_LENS, 1),
-  ].map(m => {
-    m.setTier(ModifierTier.MASTER);
-    return m;
-  });
-}
-
 /**
  * Initialize the enemy buff modifier pool
  */
@@ -737,51 +662,6 @@ function initEnemyBuffModifierPool() {
   });
 }
 
-/**
- * Initialize the daily starter modifier pool
- */
-function initDailyStarterModifierPool() {
-  dailyStarterModifierPool[ModifierTier.COMMON] = [
-    new WeightedModifierType(modifierTypes.BASE_STAT_BOOSTER, 1),
-    new WeightedModifierType(modifierTypes.BERRY, 3),
-  ].map(m => {
-    m.setTier(ModifierTier.COMMON);
-    return m;
-  });
-  dailyStarterModifierPool[ModifierTier.GREAT] = [new WeightedModifierType(modifierTypes.ATTACK_TYPE_BOOSTER, 5)].map(
-    m => {
-      m.setTier(ModifierTier.GREAT);
-      return m;
-    },
-  );
-  dailyStarterModifierPool[ModifierTier.ULTRA] = [
-    new WeightedModifierType(modifierTypes.REVIVER_SEED, 4),
-    new WeightedModifierType(modifierTypes.SOOTHE_BELL, 1),
-    new WeightedModifierType(modifierTypes.SOUL_DEW, 1),
-    new WeightedModifierType(modifierTypes.GOLDEN_PUNCH, 1),
-  ].map(m => {
-    m.setTier(ModifierTier.ULTRA);
-    return m;
-  });
-  dailyStarterModifierPool[ModifierTier.ROGUE] = [
-    new WeightedModifierType(modifierTypes.GRIP_CLAW, 5),
-    new WeightedModifierType(modifierTypes.BATON, 2),
-    new WeightedModifierType(modifierTypes.FOCUS_BAND, 5),
-    new WeightedModifierType(modifierTypes.QUICK_CLAW, 3),
-    new WeightedModifierType(modifierTypes.KINGS_ROCK, 3),
-  ].map(m => {
-    m.setTier(ModifierTier.ROGUE);
-    return m;
-  });
-  dailyStarterModifierPool[ModifierTier.MASTER] = [
-    new WeightedModifierType(modifierTypes.LEFTOVERS, 1),
-    new WeightedModifierType(modifierTypes.SHELL_BELL, 1),
-  ].map(m => {
-    m.setTier(ModifierTier.MASTER);
-    return m;
-  });
-}
-
 /**
  * Initialize {@linkcode modifierPool} with the initial set of modifier types.
  * {@linkcode initModifierTypes} MUST be called before this function.
@@ -798,7 +678,6 @@ export function initModifierPools() {
   initWildModifierPool();
   initTrainerModifierPool();
   initEnemyBuffModifierPool();
-  initDailyStarterModifierPool();
 }
 
 /**
diff --git a/src/modifier/modifier-pools.ts b/src/modifier/modifier-pools.ts
index 3396dca1f93..db6ebc700e5 100644
--- a/src/modifier/modifier-pools.ts
+++ b/src/modifier/modifier-pools.ts
@@ -7,10 +7,6 @@ import type { ModifierPool } from "#app/@types/modifier-types";
 
 export const modifierPool: ModifierPool = {};
 
-export const wildModifierPool: ModifierPool = {};
-
-export const trainerModifierPool: ModifierPool = {};
-
 export const enemyBuffModifierPool: ModifierPool = {};
 
 export const dailyStarterModifierPool: ModifierPool = {};
diff --git a/src/modifier/modifier-type.ts b/src/modifier/modifier-type.ts
index 5cbcc293e9d..744b46e9fef 100644
--- a/src/modifier/modifier-type.ts
+++ b/src/modifier/modifier-type.ts
@@ -46,7 +46,6 @@ import {
   MoneyRewardModifier,
   MultipleParticipantExpBonusModifier,
   PokemonAllMovePpRestoreModifier,
-  type PokemonHeldItemModifier,
   PokemonHpRestoreModifier,
   PokemonLevelIncrementModifier,
   PokemonNatureChangeModifier,
@@ -98,12 +97,12 @@ import { HeldItemId } from "#enums/held-item-id";
 import { allHeldItems } from "#app/items/all-held-items";
 import { TYPE_BOOST_ITEM_BOOST_PERCENT } from "#app/constants";
 import { attackTypeToHeldItem } from "#app/items/held-items/attack-type-booster";
-import { berryTypeToHeldItem } from "#app/items/held-items/berry";
 import { permanentStatToHeldItem, statBoostItems } from "#app/items/held-items/base-stat-booster";
 import { SPECIES_STAT_BOOSTER_ITEMS, type SpeciesStatBoosterItemId } from "#app/items/held-items/stat-booster";
 import { ModifierPoolType } from "#enums/modifier-pool-type";
-import { getModifierPoolForType, getModifierType } from "#app/utils/modifier-utils";
+import { getModifierPoolForType } from "#app/utils/modifier-utils";
 import type { ModifierTypeFunc, WeightedModifierTypeWeightFunc } from "#app/@types/modifier-types";
+import { getNewAttackTypeBoosterHeldItem, getNewBerryHeldItem, getNewVitaminHeldItem } from "#app/items/held-item-pool";
 
 const outputModifierData = false;
 const useMaxWeightForOutput = false;
@@ -767,41 +766,14 @@ export class TempStatStageBoosterModifierType extends ModifierType implements Ge
   }
 }
 
-export class BerryReward extends HeldItemReward implements GeneratedPersistentModifierType {
-  private berryType: BerryType;
-
-  constructor(berryType: BerryType) {
-    const itemId = berryTypeToHeldItem[berryType];
-    super(itemId);
-
-    this.berryType = berryType;
-    this.id = "BERRY"; // needed to prevent harvest item deletion; remove after modifier rework
-  }
-
-  getPregenArgs(): any[] {
-    return [this.berryType];
-  }
-}
-
 class BerryRewardGenerator extends ModifierTypeGenerator {
   constructor() {
     super((_party: Pokemon[], pregenArgs?: any[]) => {
       if (pregenArgs && pregenArgs.length === 1 && pregenArgs[0] in BerryType) {
         return new BerryReward(pregenArgs[0] as BerryType);
       }
-      const berryTypes = getEnumValues(BerryType);
-      let randBerryType: BerryType;
-      const rand = randSeedInt(12);
-      if (rand < 2) {
-        randBerryType = BerryType.SITRUS;
-      } else if (rand < 4) {
-        randBerryType = BerryType.LUM;
-      } else if (rand < 6) {
-        randBerryType = BerryType.LEPPA;
-      } else {
-        randBerryType = berryTypes[randSeedInt(berryTypes.length - 3) + 2];
-      }
-      return new BerryReward(randBerryType);
+      const item = getNewBerryHeldItem();
+      return new HeldItemReward(item);
     });
   }
 }
@@ -1166,47 +1138,9 @@ class AttackTypeBoosterRewardGenerator extends ModifierTypeGenerator {
         return new AttackTypeBoosterReward(pregenArgs[0] as PokemonType, TYPE_BOOST_ITEM_BOOST_PERCENT);
       }
 
-      // TODO: make this consider moves or abilities that change types
-      const attackMoveTypes = party.flatMap(p =>
-        p
-          .getMoveset()
-          .map(m => m.getMove())
-          .filter(m => m.is("AttackMove"))
-          .map(m => m.type),
-      );
-      if (!attackMoveTypes.length) {
-        return null;
-      }
+      const item = getNewAttackTypeBoosterHeldItem(party);
 
-      const attackMoveTypeWeights = new Map<PokemonType, number>();
-      let totalWeight = 0;
-      for (const t of attackMoveTypes) {
-        const weight = attackMoveTypeWeights.get(t) ?? 0;
-        if (weight < 3) {
-          attackMoveTypeWeights.set(t, weight + 1);
-          totalWeight++;
-        }
-      }
-
-      if (!totalWeight) {
-        return null;
-      }
-
-      let type: PokemonType;
-
-      const randInt = randSeedInt(totalWeight);
-      let weight = 0;
-
-      for (const t of attackMoveTypeWeights.keys()) {
-        const typeWeight = attackMoveTypeWeights.get(t)!; // guranteed to be defined
-        if (randInt <= weight + typeWeight) {
-          type = t;
-          break;
-        }
-        weight += typeWeight;
-      }
-
-      return new AttackTypeBoosterReward(type!, TYPE_BOOST_ITEM_BOOST_PERCENT);
+      return item ? new HeldItemReward(item) : null;
     });
   }
 }
@@ -1217,8 +1151,7 @@ class BaseStatBoosterRewardGenerator extends ModifierTypeGenerator {
       if (pregenArgs) {
         return new BaseStatBoosterReward(pregenArgs[0]);
       }
-      const randStat: PermanentStat = randSeedInt(Stat.SPD + 1);
-      return new BaseStatBoosterReward(randStat);
+      return new HeldItemReward(getNewVitaminHeldItem());
     });
   }
 }