Fix Baton Pass not working

src/battle-scene.ts

@@ -1418,7 +1418,7 @@ export default class BattleScene extends SceneBase {
 
 	playBgm(bgmName?: string, fadeOut?: boolean): void {
 		if (bgmName === undefined)
-			bgmName = this.currentBattle.getBgmOverride(this) || this.arena.bgm;
+			bgmName = this.currentBattle?.getBgmOverride(this) || this.arena?.bgm;
 		if (this.bgm && bgmName === this.bgm.key) {
 			if (!this.bgm.isPlaying) {
 				this.bgm.play({

src/data/move.ts

@@ -2836,10 +2836,8 @@ export class ForceSwitchOutAttr extends MoveEffectAttr {
 	  	if (switchOutTarget.hp) {
 	  	  applyPreSwitchOutAbAttrs(PreSwitchOutAbAttr, switchOutTarget);
 	  	  (switchOutTarget as PlayerPokemon).switchOut(this.batonPass, true).then(() => resolve(true));
-	  	}
-	  	else {
+	  	} else
 	  	  resolve(false);
-	  	}
 	  	return;
 	  }
 	  else if (user.scene.currentBattle.battleType) {

src/field/pokemon.ts

@@ -2316,7 +2316,8 @@ export class PlayerPokemon extends Pokemon {
   switchOut(batonPass: boolean, removeFromField: boolean = false): Promise<void> {
     return new Promise(resolve => {
       this.resetTurnData();
-      this.resetSummonData();
+      if (!batonPass)
+        this.resetSummonData();
       this.hideInfo();
       this.setVisible(false);