From 22865c010a5edcd084863d2c777e272bd456c458 Mon Sep 17 00:00:00 2001
From: Moka <54149968+MokaStitcher@users.noreply.github.com>
Date: Sat, 26 Oct 2024 23:16:37 +0200
Subject: [PATCH] fix oversight with save migration (#4731)

---
 src/system/pokemon-data.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/system/pokemon-data.ts b/src/system/pokemon-data.ts
index c8756e4dd7f..485c1d90c1d 100644
--- a/src/system/pokemon-data.ts
+++ b/src/system/pokemon-data.ts
@@ -118,8 +118,8 @@ export default class PokemonData {
 
     // Deprecated, but needed for session data migration
     this.natureOverride = source.natureOverride;
-    this.mysteryEncounterPokemonData = new CustomPokemonData(source.mysteryEncounterPokemonData);
-    this.fusionMysteryEncounterPokemonData = new CustomPokemonData(source.fusionMysteryEncounterPokemonData);
+    this.mysteryEncounterPokemonData = source.mysteryEncounterPokemonData ? new CustomPokemonData(source.mysteryEncounterPokemonData) : null;
+    this.fusionMysteryEncounterPokemonData = source.fusionMysteryEncounterPokemonData ? new CustomPokemonData(source.fusionMysteryEncounterPokemonData) : null;
 
     if (!forHistory) {
       this.boss = (source instanceof EnemyPokemon && !!source.bossSegments) || (!this.player && !!source.boss);