diff --git a/src/battle-scene.ts b/src/battle-scene.ts
index e89874a075c..f117615e5db 100644
--- a/src/battle-scene.ts
+++ b/src/battle-scene.ts
@@ -59,7 +59,7 @@ import { SceneBase } from './scene-base';
 import CandyBar from './ui/candy-bar';
 import { Variant, variantData } from './data/variant';
 import { Localizable } from './plugins/i18n';
-import { STARTING_WAVE_OVERRIDE, OPP_SPECIES_OVERRIDE, SEED_OVERRIDE, STARTING_BIOME_OVERRIDE } from './overrides';
+import { STARTING_WAVE_OVERRIDE, OPP_SPECIES_OVERRIDE, SEED_OVERRIDE, STARTING_BIOME_OVERRIDE, DOUBLE_BATTLE_OVERRIDE } from './overrides';
 import {InputsController} from "./inputs-controller";
 import {UiInputs} from "./ui-inputs";
 
@@ -842,6 +842,9 @@ export default class BattleScene extends SceneBase {
 		} else if (!battleConfig)
 			newDouble = !!double;
 
+		if (DOUBLE_BATTLE_OVERRIDE)
+			newDouble = true;
+
 		const lastBattle = this.currentBattle;
 
 		if (lastBattle?.double && !newDouble)
diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index 2242b1ee694..5f7ac90b0f4 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -43,7 +43,7 @@ import { Nature, getNatureStatMultiplier } from '../data/nature';
 import { SpeciesFormChange, SpeciesFormChangeActiveTrigger, SpeciesFormChangeMoveLearnedTrigger, SpeciesFormChangePostMoveTrigger, SpeciesFormChangeStatusEffectTrigger } from '../data/pokemon-forms';
 import { TerrainType } from '../data/terrain';
 import { TrainerSlot } from '../data/trainer-config';
-import { ABILITY_OVERRIDE, MOVE_OVERRIDE, MOVE_OVERRIDE_2, OPP_ABILITY_OVERRIDE, OPP_MOVE_OVERRIDE, OPP_MOVE_OVERRIDE_2, OPP_SHINY_OVERRIDE, OPP_VARIANT_OVERRIDE } from '../overrides';
+import { ABILITY_OVERRIDE, MOVE_OVERRIDE, MOVE_OVERRIDE_2, OPP_ABILITY_OVERRIDE, OPP_MOVE_OVERRIDE, OPP_MOVE_OVERRIDE_2, OPP_PASSIVE_ABILITY_OVERRIDE, OPP_SHINY_OVERRIDE, OPP_VARIANT_OVERRIDE, PASSIVE_ABILITY_OVERRIDE } from '../overrides';
 import { BerryType } from '../data/berry';
 import i18next from '../plugins/i18n';
 
@@ -811,6 +811,11 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   }
 
   getPassiveAbility(): Ability {
+    if (PASSIVE_ABILITY_OVERRIDE && this.isPlayer())
+      return allAbilities[PASSIVE_ABILITY_OVERRIDE];
+    if (OPP_PASSIVE_ABILITY_OVERRIDE && !this.isPlayer())
+      return allAbilities[OPP_PASSIVE_ABILITY_OVERRIDE];
+
     let starterSpeciesId = this.species.speciesId;
     while (pokemonPrevolutions.hasOwnProperty(starterSpeciesId))
       starterSpeciesId = pokemonPrevolutions[starterSpeciesId];
@@ -818,6 +823,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
   } 
 
   hasPassive(): boolean {
+    if ((PASSIVE_ABILITY_OVERRIDE !== Abilities.NONE && this.isPlayer()) || (OPP_PASSIVE_ABILITY_OVERRIDE !== Abilities.NONE && !this.isPlayer()))
+      return true;
     return this.passive || this.isBoss();
   }
 
diff --git a/src/overrides.ts b/src/overrides.ts
index 4b9bcaa0ba0..7608275ea0f 100644
--- a/src/overrides.ts
+++ b/src/overrides.ts
@@ -12,12 +12,15 @@ export const STARTING_WAVE_OVERRIDE = 0;
 export const STARTING_BIOME_OVERRIDE = Biome.TOWN;
 export const STARTING_MONEY_OVERRIDE = 0;
 export const WEATHER_OVERRIDE = WeatherType.NONE;
+export const DOUBLE_BATTLE_OVERRIDE = false;
 
 export const ABILITY_OVERRIDE = Abilities.NONE;
+export const PASSIVE_ABILITY_OVERRIDE = Abilities.NONE;
 export const MOVE_OVERRIDE = Moves.NONE;
 export const MOVE_OVERRIDE_2 = Moves.NONE;
 export const OPP_SPECIES_OVERRIDE = 0;
 export const OPP_ABILITY_OVERRIDE = Abilities.NONE;
+export const OPP_PASSIVE_ABILITY_OVERRIDE = Abilities.NONE;
 export const OPP_MOVE_OVERRIDE = Moves.NONE;
 export const OPP_MOVE_OVERRIDE_2 = Moves.NONE;