[Ability] Ignore Held Items for Stat Calculation

src/data/battler-tags.ts

@@ -1752,7 +1752,7 @@ export class HighestStatBoostTag extends AbilityBattlerTag {
     super.onAdd(pokemon);
 
     let highestStat: EffectiveStat;
-    EFFECTIVE_STATS.map(s => pokemon.getEffectiveStat(s)).reduce((highestValue: number, value: number, i: number) => {
+    EFFECTIVE_STATS.map(s => pokemon.getEffectiveStat(s, undefined, undefined, undefined, undefined, undefined, undefined, true)).reduce((highestValue: number, value: number, i: number) => {
       if (value > highestValue) {
         highestStat = EFFECTIVE_STATS[i];
         return value;
@@ -1771,7 +1771,6 @@ export class HighestStatBoostTag extends AbilityBattlerTag {
         this.multiplier = 1.3;
         break;
     }
-
     globalScene.queueMessage(i18next.t("battlerTags:highestStatBoostOnAdd", { pokemonNameWithAffix: getPokemonNameWithAffix(pokemon), statName: i18next.t(getStatKey(highestStat)) }), null, false, null, true);
   }
 

src/field/pokemon.ts

@@ -947,11 +947,14 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
    * @param ignoreOppAbility during an attack, determines whether the opposing Pokemon's abilities should be ignored during the stat calculation.
    * @param isCritical determines whether a critical hit has occurred or not (`false` by default)
    * @param simulated if `true`, nullifies any effects that produce any changes to game state from triggering
+   * @param ignoreHeldItems determines whether this Pokemon's held items should be ignored during the stat calculation, default `false`
    * @returns the final in-battle value of a stat
    */
-  getEffectiveStat(stat: EffectiveStat, opponent?: Pokemon, move?: Move, ignoreAbility: boolean = false, ignoreOppAbility: boolean = false, isCritical: boolean = false, simulated: boolean = true): number {
+  getEffectiveStat(stat: EffectiveStat, opponent?: Pokemon, move?: Move, ignoreAbility: boolean = false, ignoreOppAbility: boolean = false, isCritical: boolean = false, simulated: boolean = true, ignoreHeldItems: boolean = false): number {
     const statValue = new Utils.NumberHolder(this.getStat(stat, false));
-    globalScene.applyModifiers(StatBoosterModifier, this.isPlayer(), this, stat, statValue);
+    if (!ignoreHeldItems) {
+      globalScene.applyModifiers(StatBoosterModifier, this.isPlayer(), this, stat, statValue);
+    }
 
     // The Ruin abilities here are never ignored, but they reveal themselves on summon anyway
     const fieldApplied = new Utils.BooleanHolder(false);
@@ -965,7 +968,7 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       applyStatMultiplierAbAttrs(StatMultiplierAbAttr, this, stat, statValue, simulated);
     }
 
-    let ret = statValue.value * this.getStatStageMultiplier(stat, opponent, move, ignoreOppAbility, isCritical, simulated);
+    let ret = statValue.value * this.getStatStageMultiplier(stat, opponent, move, ignoreOppAbility, isCritical, simulated, ignoreHeldItems);
 
     switch (stat) {
       case Stat.ATK:
@@ -2487,9 +2490,10 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
    * @param ignoreOppAbility determines whether the effects of the opponent's abilities (i.e. Unaware) should be ignored (`false` by default)
    * @param isCritical determines whether a critical hit has occurred or not (`false` by default)
    * @param simulated determines whether effects are applied without altering game state (`true` by default)
+   * @param ignoreHeldItems determines whether this Pokemon's held items should be ignored during the stat calculation, default `false`
    * @return the stat stage multiplier to be used for effective stat calculation
    */
-  getStatStageMultiplier(stat: EffectiveStat, opponent?: Pokemon, move?: Move, ignoreOppAbility: boolean = false, isCritical: boolean = false, simulated: boolean = true): number {
+  getStatStageMultiplier(stat: EffectiveStat, opponent?: Pokemon, move?: Move, ignoreOppAbility: boolean = false, isCritical: boolean = false, simulated: boolean = true, ignoreHeldItems: boolean = false): number {
     const statStage = new Utils.IntegerHolder(this.getStatStage(stat));
     const ignoreStatStage = new Utils.BooleanHolder(false);
 
@@ -2516,7 +2520,9 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
 
     if (!ignoreStatStage.value) {
       const statStageMultiplier = new Utils.NumberHolder(Math.max(2, 2 + statStage.value) / Math.max(2, 2 - statStage.value));
-      globalScene.applyModifiers(TempStatStageBoosterModifier, this.isPlayer(), stat, statStageMultiplier);
+      if (!ignoreHeldItems) {
+        globalScene.applyModifiers(TempStatStageBoosterModifier, this.isPlayer(), stat, statStageMultiplier);
+      }
       return Math.min(statStageMultiplier.value, 4);
     }
     return 1;