diff --git a/src/data/moves/move.ts b/src/data/moves/move.ts
index 35007dc8964..779b63971e9 100644
--- a/src/data/moves/move.ts
+++ b/src/data/moves/move.ts
@@ -73,7 +73,6 @@ import {
   PokemonHeldItemModifier,
   PokemonMoveAccuracyBoosterModifier,
   PokemonMultiHitModifier,
-  PreserveBerryModifier,
 } from "../../modifier/held-item-modifier";
 import type { BattlerIndex } from "../../battle";
 import { BattleType } from "#enums/battle-type";
@@ -123,6 +122,7 @@ import { MoveEffectTrigger } from "#enums/MoveEffectTrigger";
 import { MultiHitType } from "#enums/MultiHitType";
 import { invalidAssistMoves, invalidCopycatMoves, invalidMetronomeMoves, invalidMirrorMoveMoves, invalidSleepTalkMoves } from "./invalid-moves";
 import { SelectBiomePhase } from "#app/phases/select-biome-phase";
+import { PreserveBerryModifier } from "#app/modifier/modifier";
 
 type MoveConditionFunc = (user: Pokemon, target: Pokemon, move: Move) => boolean;
 type UserMoveConditionFunc = (user: Pokemon, move: Move) => boolean;
diff --git a/src/data/mystery-encounters/encounters/delibirdy-encounter.ts b/src/data/mystery-encounters/encounters/delibirdy-encounter.ts
index 9c5ffb3faae..5882df947c2 100644
--- a/src/data/mystery-encounters/encounters/delibirdy-encounter.ts
+++ b/src/data/mystery-encounters/encounters/delibirdy-encounter.ts
@@ -23,9 +23,13 @@ import {
   BerryModifier,
   type PokemonHeldItemModifier,
   type PokemonInstantReviveModifier,
-  PreserveBerryModifier,
 } from "#app/modifier/held-item-modifier";
-import { HealingBoosterModifier, LevelIncrementBoosterModifier, MoneyMultiplierModifier } from "#app/modifier/modifier";
+import {
+  HealingBoosterModifier,
+  LevelIncrementBoosterModifier,
+  MoneyMultiplierModifier,
+  PreserveBerryModifier,
+} from "#app/modifier/modifier";
 import type { PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
 import { modifierTypes } from "#app/modifier/modifier-type";
 import { ModifierRewardPhase } from "#app/phases/modifier-reward-phase";
diff --git a/src/modifier/held-item-modifier.ts b/src/modifier/held-item-modifier.ts
index e496dbe7116..1313fea8b12 100644
--- a/src/modifier/held-item-modifier.ts
+++ b/src/modifier/held-item-modifier.ts
@@ -28,6 +28,7 @@ import {
   type Modifier,
   MoneyMultiplierModifier,
   PersistentModifier,
+  PreserveBerryModifier,
   TempExtraModifierModifier,
 } from "./modifier";
 import {
@@ -1252,42 +1253,6 @@ export class BerryModifier extends PokemonHeldItemModifier {
   }
 }
 
-export class PreserveBerryModifier extends PersistentModifier {
-  match(modifier: Modifier) {
-    return modifier instanceof PreserveBerryModifier;
-  }
-
-  clone() {
-    return new PreserveBerryModifier(this.type, this.stackCount);
-  }
-
-  /**
-   * Checks if all prequired conditions are met to apply {@linkcode PreserveBerryModifier}
-   * @param pokemon {@linkcode Pokemon} that holds the berry
-   * @param doPreserve {@linkcode BooleanHolder} that is `true` if the berry should be preserved
-   * @returns `true` if {@linkcode PreserveBerryModifier} should be applied
-   */
-  override shouldApply(pokemon?: Pokemon, doPreserve?: BooleanHolder): boolean {
-    return !!pokemon && !!doPreserve;
-  }
-
-  /**
-   * Applies {@linkcode PreserveBerryModifier}
-   * @param pokemon The {@linkcode Pokemon} that holds the berry
-   * @param doPreserve {@linkcode BooleanHolder} that is `true` if the berry should be preserved
-   * @returns always `true`
-   */
-  override apply(pokemon: Pokemon, doPreserve: BooleanHolder): boolean {
-    doPreserve.value ||= pokemon.randBattleSeedInt(10) < this.getStackCount() * 3;
-
-    return true;
-  }
-
-  getMaxStackCount(): number {
-    return 3;
-  }
-}
-
 export class PokemonInstantReviveModifier extends PokemonHeldItemModifier {
   matchType(modifier: Modifier) {
     return modifier instanceof PokemonInstantReviveModifier;
diff --git a/src/modifier/modifier-type.ts b/src/modifier/modifier-type.ts
index b9809ec8996..7b09b1ca679 100644
--- a/src/modifier/modifier-type.ts
+++ b/src/modifier/modifier-type.ts
@@ -65,6 +65,7 @@ import {
   type Modifier,
   TempExtraModifierModifier,
   CriticalCatchChanceBoosterModifier,
+  PreserveBerryModifier,
 } from "#app/modifier/modifier";
 import {
   AttackTypeBoosterModifier,
@@ -89,7 +90,6 @@ import {
   PokemonMoveAccuracyBoosterModifier,
   PokemonMultiHitModifier,
   PokemonNatureWeightModifier,
-  PreserveBerryModifier,
   ResetNegativeStatStageModifier,
   SpeciesCritBoosterModifier,
   SpeciesStatBoosterModifier,
diff --git a/src/modifier/modifier.ts b/src/modifier/modifier.ts
index 1211ebcd81d..e9dc87c939d 100644
--- a/src/modifier/modifier.ts
+++ b/src/modifier/modifier.ts
@@ -1281,6 +1281,42 @@ export class CriticalCatchChanceBoosterModifier extends PersistentModifier {
   }
 }
 
+export class PreserveBerryModifier extends PersistentModifier {
+  match(modifier: Modifier) {
+    return modifier instanceof PreserveBerryModifier;
+  }
+
+  clone() {
+    return new PreserveBerryModifier(this.type, this.stackCount);
+  }
+
+  /**
+   * Checks if all prequired conditions are met to apply {@linkcode PreserveBerryModifier}
+   * @param pokemon {@linkcode Pokemon} that holds the berry
+   * @param doPreserve {@linkcode BooleanHolder} that is `true` if the berry should be preserved
+   * @returns `true` if {@linkcode PreserveBerryModifier} should be applied
+   */
+  override shouldApply(pokemon?: Pokemon, doPreserve?: BooleanHolder): boolean {
+    return !!pokemon && !!doPreserve;
+  }
+
+  /**
+   * Applies {@linkcode PreserveBerryModifier}
+   * @param pokemon The {@linkcode Pokemon} that holds the berry
+   * @param doPreserve {@linkcode BooleanHolder} that is `true` if the berry should be preserved
+   * @returns always `true`
+   */
+  override apply(pokemon: Pokemon, doPreserve: BooleanHolder): boolean {
+    doPreserve.value ||= pokemon.randBattleSeedInt(10) < this.getStackCount() * 3;
+
+    return true;
+  }
+
+  getMaxStackCount(): number {
+    return 3;
+  }
+}
+
 export class LockModifierTiersModifier extends PersistentModifier {
   match(modifier: Modifier): boolean {
     return modifier instanceof LockModifierTiersModifier;
diff --git a/src/phases/turn-start-phase.ts b/src/phases/turn-start-phase.ts
index de510ef07d7..6ebb408fdef 100644
--- a/src/phases/turn-start-phase.ts
+++ b/src/phases/turn-start-phase.ts
@@ -5,7 +5,7 @@ import { Abilities } from "#app/enums/abilities";
 import { Stat } from "#app/enums/stat";
 import type Pokemon from "#app/field/pokemon";
 import { PokemonMove } from "#app/field/pokemon";
-import { BypassSpeedChanceModifier } from "#app/modifier/modifier";
+import { BypassSpeedChanceModifier } from "#app/modifier/held-item-modifier";
 import { Command } from "#app/ui/command-ui-handler";
 import { randSeedShuffle, BooleanHolder } from "#app/utils/common";
 import { AttemptCapturePhase } from "./attempt-capture-phase";
diff --git a/src/system/achv.ts b/src/system/achv.ts
index 90816ff65c3..97f41835be6 100644
--- a/src/system/achv.ts
+++ b/src/system/achv.ts
@@ -1,5 +1,5 @@
 import type { Modifier } from "typescript";
-import { TurnHeldItemTransferModifier } from "../modifier/modifier";
+import { TurnHeldItemTransferModifier } from "../modifier/held-item-modifier";
 import { pokemonEvolutions } from "#app/data/balance/pokemon-evolutions";
 import i18next from "i18next";
 import { NumberHolder } from "#app/utils/common";
diff --git a/src/ui/save-slot-select-ui-handler.ts b/src/ui/save-slot-select-ui-handler.ts
index 7b4d46203c9..122b1b6c2db 100644
--- a/src/ui/save-slot-select-ui-handler.ts
+++ b/src/ui/save-slot-select-ui-handler.ts
@@ -12,6 +12,7 @@ import { TextStyle, addTextObject } from "./text";
 import { UiMode } from "#enums/ui-mode";
 import { addWindow } from "./ui-theme";
 import { RunDisplayMode } from "#app/ui/run-info-ui-handler";
+import { PokemonHeldItemModifier } from "#app/modifier/held-item-modifier";
 
 const SESSION_SLOTS_COUNT = 5;
 const SLOTS_ON_SCREEN = 3;
@@ -445,7 +446,7 @@ class SessionSlot extends Phaser.GameObjects.Container {
     let visibleModifierIndex = 0;
     for (const m of data.modifiers) {
       const modifier = m.toModifier(Modifier[m.className]);
-      if (modifier instanceof Modifier.PokemonHeldItemModifier) {
+      if (modifier instanceof PokemonHeldItemModifier) {
         continue;
       }
       const icon = modifier?.getIcon(false);
diff --git a/test/abilities/harvest.test.ts b/test/abilities/harvest.test.ts
index eef954c28e8..6fccae01609 100644
--- a/test/abilities/harvest.test.ts
+++ b/test/abilities/harvest.test.ts
@@ -1,7 +1,8 @@
 import { BattlerIndex } from "#app/battle";
 import { PostTurnRestoreBerryAbAttr } from "#app/data/abilities/ability";
 import type Pokemon from "#app/field/pokemon";
-import { BerryModifier, PreserveBerryModifier } from "#app/modifier/held-item-modifier";
+import { BerryModifier } from "#app/modifier/held-item-modifier";
+import { PreserveBerryModifier } from "#app/modifier/modifier";
 import type { ModifierOverride } from "#app/modifier/modifier-type";
 import type { BooleanHolder } from "#app/utils/common";
 import { Abilities } from "#enums/abilities";
diff --git a/test/achievements/achievement.test.ts b/test/achievements/achievement.test.ts
index 0b49c4d23ab..22c4d670e6f 100644
--- a/test/achievements/achievement.test.ts
+++ b/test/achievements/achievement.test.ts
@@ -1,4 +1,4 @@
-import { TurnHeldItemTransferModifier } from "#app/modifier/modifier";
+import { TurnHeldItemTransferModifier } from "#app/modifier/held-item-modifier";
 import {
   Achv,
   AchvTier,
diff --git a/test/final_boss.test.ts b/test/final_boss.test.ts
index 1b0cdce60a0..e19e85149fd 100644
--- a/test/final_boss.test.ts
+++ b/test/final_boss.test.ts
@@ -1,5 +1,5 @@
 import { GameModes } from "#app/game-mode";
-import { TurnHeldItemTransferModifier } from "#app/modifier/modifier";
+import { TurnHeldItemTransferModifier } from "#app/modifier/held-item-modifier";
 import { Abilities } from "#enums/abilities";
 import { Biome } from "#enums/biome";
 import { Moves } from "#enums/moves";
diff --git a/test/items/eviolite.test.ts b/test/items/eviolite.test.ts
index fafc0f4a10c..e9e9574cbf3 100644
--- a/test/items/eviolite.test.ts
+++ b/test/items/eviolite.test.ts
@@ -1,4 +1,4 @@
-import { StatBoosterModifier } from "#app/modifier/modifier";
+import { StatBoosterModifier } from "#app/modifier/held-item-modifier";
 import { NumberHolder, randItem } from "#app/utils/common";
 import { Species } from "#enums/species";
 import { Stat } from "#enums/stat";
diff --git a/test/items/exp_booster.test.ts b/test/items/exp_booster.test.ts
index ec7528c3b23..16ac3c0490f 100644
--- a/test/items/exp_booster.test.ts
+++ b/test/items/exp_booster.test.ts
@@ -1,5 +1,5 @@
 import { Abilities } from "#app/enums/abilities";
-import { PokemonExpBoosterModifier } from "#app/modifier/modifier";
+import { PokemonExpBoosterModifier } from "#app/modifier/held-item-modifier";
 import { NumberHolder } from "#app/utils/common";
 import GameManager from "#test/testUtils/gameManager";
 import Phase from "phaser";
diff --git a/test/mystery-encounter/encounters/delibirdy-encounter.test.ts b/test/mystery-encounter/encounters/delibirdy-encounter.test.ts
index 12eaeac869e..6c61f4b6a39 100644
--- a/test/mystery-encounter/encounters/delibirdy-encounter.test.ts
+++ b/test/mystery-encounter/encounters/delibirdy-encounter.test.ts
@@ -19,13 +19,17 @@ import {
   HitHealModifier,
   PokemonInstantReviveModifier,
   PokemonNatureWeightModifier,
-  PreserveBerryModifier,
 } from "#app/modifier/held-item-modifier";
 import { MysteryEncounterPhase } from "#app/phases/mystery-encounter-phases";
 import { generateModifierType } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
 import { modifierTypes } from "#app/modifier/modifier-type";
 import { BerryType } from "#enums/berry-type";
-import { HealingBoosterModifier, LevelIncrementBoosterModifier, MoneyMultiplierModifier } from "#app/modifier/modifier";
+import {
+  HealingBoosterModifier,
+  LevelIncrementBoosterModifier,
+  MoneyMultiplierModifier,
+  PreserveBerryModifier,
+} from "#app/modifier/modifier";
 
 const namespace = "mysteryEncounters/delibirdy";
 const defaultParty = [Species.LAPRAS, Species.GENGAR, Species.ABRA];