move: handle some aspects of custom fail text a bit better

src/data/ability.ts

@@ -2356,7 +2356,7 @@ export class IncreasePpAbAttr extends AbAttr { }
 
 export class ForceSwitchOutImmunityAbAttr extends AbAttr {
   apply(pokemon: Pokemon, passive: boolean, cancelled: Utils.BooleanHolder, args: any[]): boolean {
-    pokemon.scene.queueMessage(getPokemonMessage(pokemon, ` can't be switched out!`))
+    cancelled.value = true;
     return true;
   }
 }

src/data/move.ts

@@ -327,10 +327,12 @@ export default class Move implements Localizable {
   }
 
   getFailedText(user: Pokemon, target: Pokemon, move: Move, cancelled: Utils.BooleanHolder): string | null {
-    let failedText = null;
-    for (let attr of this.attrs)
-      failedText = attr.getFailedText(user, target, move, cancelled);
-    return failedText;
+    for (let attr of this.attrs) {
+      let failedText = attr.getFailedText(user, target, move, cancelled);
+      if (failedText !== null)
+        return failedText;
+    }
+    return null;
   }
 
   getUserBenefitScore(user: Pokemon, target: Pokemon, move: Move): integer {
@@ -3035,8 +3037,9 @@ export class ForceSwitchOutAttr extends MoveEffectAttr {
   }
 
   getFailedText(user: Pokemon, target: Pokemon, move: Move, cancelled: Utils.BooleanHolder): string | null {
-    applyAbAttrs(ForceSwitchOutImmunityAbAttr, target, cancelled);
-    return null;
+    const blockedByAbility = new Utils.BooleanHolder(false);
+    applyAbAttrs(ForceSwitchOutImmunityAbAttr, target, blockedByAbility);
+    return blockedByAbility.value ? getPokemonMessage(target, ` can't be switched out!`) : null;
   }
 
   getSwitchOutCondition(): MoveConditionFunc {

src/phases.ts

@@ -2278,7 +2278,7 @@ export class MovePhase extends BattlePhase {
 
       // Assume conditions affecting targets only apply to moves with a single target
       let success = this.move.getMove().applyConditions(this.pokemon, targets[0], this.move.getMove());
-      let cancelled = new Utils.BooleanHolder(true);
+      let cancelled = new Utils.BooleanHolder(false);
       let failedText = this.move.getMove().getFailedText(this.pokemon, targets[0], this.move.getMove(), cancelled);
       if (success && this.scene.arena.isMoveWeatherCancelled(this.move.getMove()))
         success = false;