diff --git a/src/game-mode.ts b/src/game-mode.ts
index ec7171b0024..97398d2b0a9 100644
--- a/src/game-mode.ts
+++ b/src/game-mode.ts
@@ -7,7 +7,7 @@ import type PokemonSpecies from "./data/pokemon-species";
 import { allSpecies } from "./data/pokemon-species";
 import type { Arena } from "./field/arena";
 import Overrides from "#app/overrides";
-import { randSeedInt, randSeedItem } from "#app/utils/common";
+import { isNullOrUndefined, randSeedInt, randSeedItem } from "#app/utils/common";
 import { Biome } from "#enums/biome";
 import { Species } from "#enums/species";
 import { Challenges } from "./enums/challenges";
@@ -124,16 +124,20 @@ export class GameMode implements GameModeConfig {
 
   /**
    * @returns either:
-   * - random biome for Daily mode
    * - override from overrides.ts
+   * - random biome for Daily mode
    * - Town
    */
   getStartingBiome(): Biome {
+    if (!isNullOrUndefined(Overrides.STARTING_BIOME_OVERRIDE)) {
+      return Overrides.STARTING_BIOME_OVERRIDE;
+    }
+
     switch (this.modeId) {
       case GameModes.DAILY:
         return getDailyStartingBiome();
       default:
-        return Overrides.STARTING_BIOME_OVERRIDE || Biome.TOWN;
+        return Biome.TOWN;
     }
   }
 
diff --git a/src/overrides.ts b/src/overrides.ts
index 5bbd29b355f..95c758d7c43 100644
--- a/src/overrides.ts
+++ b/src/overrides.ts
@@ -73,7 +73,7 @@ class DefaultOverrides {
    */
   readonly BATTLE_STYLE_OVERRIDE: BattleStyle | null = null;
   readonly STARTING_WAVE_OVERRIDE: number = 0;
-  readonly STARTING_BIOME_OVERRIDE: Biome = Biome.TOWN;
+  readonly STARTING_BIOME_OVERRIDE: Biome | null = null;
   readonly ARENA_TINT_OVERRIDE: TimeOfDay | null = null;
   /** Multiplies XP gained by this value including 0. Set to null to ignore the override. */
   readonly XP_MULTIPLIER_OVERRIDE: number | null = null;