Update ability.ts

Set code back to full copy of normal immunity classes.
Extending from the normal classes caused ability triggers to happen twice due to how the system is setup.

src/data/ability.ts

@@ -1731,10 +1731,30 @@ export class ProtectStatAbAttr extends PreStatChangeAbAttr {
 }
 
 /**
- * Extends from {@link ProtectStatAbAttr} to allow abilities to mark that they can protect allies from stat changes.
- * Requires the Affected Pokemon to then check if ally has any ability with this attribute and apply the effect.
+ * Attrbiute class to allow abilities to mark that they can protect allies from stat reductions.
  */
-export class AllyProtectStatAbAttr extends ProtectStatAbAttr { }
+export class AllyProtectStatAbAttr extends PreStatChangeAbAttr {
+  private protectedStat: BattleStat;
+
+  constructor(protectedStat?: BattleStat) {
+    super();
+
+    this.protectedStat = protectedStat;
+  }
+
+  applyPreStatChange(pokemon: Pokemon, passive: boolean, stat: BattleStat, cancelled: Utils.BooleanHolder, args: any[]): boolean {
+    if (this.protectedStat === undefined || stat === this.protectedStat) {
+      cancelled.value = true;
+      return true;
+    }
+    
+    return false;
+  }
+
+  getTriggerMessage(pokemon: Pokemon, abilityName: string, ...args: any[]): string {
+    return getPokemonMessage(pokemon, `'s ${abilityName}\nprevents lowering its ${this.protectedStat !== undefined ? getBattleStatName(this.protectedStat) : 'stats'}!`);
+  }
+}
 
 export class PreSetStatusAbAttr extends AbAttr {
   applyPreSetStatus(pokemon: Pokemon, passive: boolean, effect: StatusEffect, cancelled: Utils.BooleanHolder, args: any[]): boolean | Promise<boolean> {
@@ -1766,10 +1786,30 @@ export class StatusEffectImmunityAbAttr extends PreSetStatusAbAttr {
 }
 
 /**
- * Extends from {@link StatusEffectImmunityAbAttr} to allow abilities to mark that they can protect allies from status effects.
- * Requires the Affected Pokemon to then check if ally has any ability with this attribute and apply the effect.
+ * Attrbiute class to allow abilities to mark that they can protect allies from status effects.
  */
-export class AllyStatusEffectImmunityAbAttr extends StatusEffectImmunityAbAttr { }
+export class AllyStatusEffectImmunityAbAttr extends PreSetStatusAbAttr {
+  private immuneEffects: StatusEffect[];
+
+  constructor(...immuneEffects: StatusEffect[]) {
+    super();
+
+    this.immuneEffects = immuneEffects;
+  }
+
+  applyPreSetStatus(pokemon: Pokemon, passive: boolean, effect: StatusEffect, cancelled: Utils.BooleanHolder, args: any[]): boolean {
+    if (!this.immuneEffects.length || this.immuneEffects.indexOf(effect) > -1) {
+      cancelled.value = true;
+      return true;
+    }
+
+    return false;
+  }
+
+  getTriggerMessage(pokemon: Pokemon, abilityName: string, ...args: any[]): string {
+    return getPokemonMessage(pokemon, `'s ${abilityName}\nprevents ${this.immuneEffects.length ? getStatusEffectDescriptor(args[0] as StatusEffect) : 'status problems'}!`);
+  }
+}
 
 export class PreApplyBattlerTagAbAttr extends AbAttr {
   applyPreApplyBattlerTag(pokemon: Pokemon, passive: boolean, tag: BattlerTag, cancelled: Utils.BooleanHolder, args: any[]): boolean | Promise<boolean> {
@@ -1801,10 +1841,30 @@ export class BattlerTagImmunityAbAttr extends PreApplyBattlerTagAbAttr {
 }
 
 /**
- * Extends from {@link BattlerTagImmunityAbAttr} to allow abilities to mark that they can protect allies from battler tags.
- * Requires the Affected Pokemon to then check if ally has any ability with this attribute and apply the effect.
+ * Attrbiute class to allow abilities to mark that they can protect allies from battler tags
  */
-export class AllyBattlerTagImmunityAbAttr extends BattlerTagImmunityAbAttr { }
+export class AllyBattlerTagImmunityAbAttr extends PreApplyBattlerTagAbAttr {
+  private immuneTagType: BattlerTagType;
+
+  constructor(immuneTagType: BattlerTagType) {
+    super();
+
+    this.immuneTagType = immuneTagType;
+  }
+
+  applyPreApplyBattlerTag(pokemon: Pokemon, passive: boolean, tag: BattlerTag, cancelled: Utils.BooleanHolder, args: any[]): boolean {
+    if (tag.tagType === this.immuneTagType) {
+      cancelled.value = true;
+      return true;
+    }
+
+    return false;
+  }
+
+  getTriggerMessage(pokemon: Pokemon, abilityName: string, ...args: any[]): string {
+    return getPokemonMessage(pokemon, `'s ${abilityName}\nprevents ${(args[0] as BattlerTag).getDescriptor()}!`);
+  }
+}
 
 export class BlockCritAbAttr extends AbAttr {
   apply(pokemon: Pokemon, passive: boolean, cancelled: Utils.BooleanHolder, args: any[]): boolean {