diff --git a/src/battle-scene.ts b/src/battle-scene.ts
index 2f062667808..62e9d8ea717 100644
--- a/src/battle-scene.ts
+++ b/src/battle-scene.ts
@@ -3008,7 +3008,8 @@ export default class BattleScene extends SceneBase {
   }
 
   validateAchv(achv: Achv, args?: unknown[]): boolean {
-    if (!this.gameData.achvUnlocks.hasOwnProperty(achv.id) && achv.validate(this, args)) {
+    if ((!this.gameData.achvUnlocks.hasOwnProperty(achv.id) || Overrides.ACHIEVEMENTS_REUNLOCK_OVERRIDE)
+      && achv.validate(this, args)) {
       this.gameData.achvUnlocks[achv.id] = new Date().getTime();
       this.ui.achvBar.showAchv(achv);
       if (vouchers.hasOwnProperty(achv.id)) {
diff --git a/src/data/mystery-encounters/encounters/the-expert-pokemon-breeder-encounter.ts b/src/data/mystery-encounters/encounters/the-expert-pokemon-breeder-encounter.ts
index 6a4c6592fda..5ac9852f27a 100644
--- a/src/data/mystery-encounters/encounters/the-expert-pokemon-breeder-encounter.ts
+++ b/src/data/mystery-encounters/encounters/the-expert-pokemon-breeder-encounter.ts
@@ -21,7 +21,6 @@ import { EggSourceType } from "#enums/egg-source-types";
 import { EggTier } from "#enums/egg-type";
 import { MysteryEncounterOptionBuilder } from "#app/data/mystery-encounters/mystery-encounter-option";
 import { MysteryEncounterOptionMode } from "#enums/mystery-encounter-option-mode";
-import { achvs } from "#app/system/achv";
 import { modifierTypes, PokemonHeldItemModifierType } from "#app/modifier/modifier-type";
 import { Type } from "#enums/type";
 import { getPokeballTintColor } from "#app/data/pokeball";
@@ -520,12 +519,6 @@ function removePokemonFromPartyAndStoreHeldItems(scene: BattleScene, encounter:
   ];
 }
 
-function checkAchievement(scene: BattleScene) {
-  if (scene.arena.biomeType === Biome.SPACE) {
-    scene.validateAchv(achvs.BREEDERS_IN_SPACE);
-  }
-}
-
 function restorePartyAndHeldItems(scene: BattleScene) {
   const encounter = scene.currentBattle.mysteryEncounter!;
   // Restore original party
@@ -617,8 +610,6 @@ function onGameOver(scene: BattleScene) {
 function doPostEncounterCleanup(scene: BattleScene) {
   const encounter = scene.currentBattle.mysteryEncounter!;
   if (!encounter.misc.encounterFailed) {
-    // Give achievement if in Space biome
-    checkAchievement(scene);
     // Give 20 friendship to the chosen pokemon
     encounter.misc.chosenPokemon.addFriendship(FRIENDSHIP_ADDED);
     restorePartyAndHeldItems(scene);
diff --git a/src/overrides.ts b/src/overrides.ts
index 7b73cd47b03..dc166307314 100644
--- a/src/overrides.ts
+++ b/src/overrides.ts
@@ -86,6 +86,8 @@ class DefaultOverrides {
   readonly ITEM_UNLOCK_OVERRIDE: Unlockables[] = [];
   /** Set to `true` to show all tutorials */
   readonly BYPASS_TUTORIAL_SKIP_OVERRIDE: boolean = false;
+  /** Set to `true` to be able to re-earn already unlocked achievements */
+  readonly ACHIEVEMENTS_REUNLOCK_OVERRIDE: boolean = false;
   /** Set to `true` to force Paralysis and Freeze to always activate, or `false` to force them to not activate */
   readonly STATUS_ACTIVATION_OVERRIDE: boolean | null = null;
 
diff --git a/src/phases/trainer-victory-phase.ts b/src/phases/trainer-victory-phase.ts
index dc1b962f47e..d797e4360ac 100644
--- a/src/phases/trainer-victory-phase.ts
+++ b/src/phases/trainer-victory-phase.ts
@@ -9,6 +9,8 @@ import { BattlePhase } from "./battle-phase";
 import { ModifierRewardPhase } from "./modifier-reward-phase";
 import { MoneyRewardPhase } from "./money-reward-phase";
 import { TrainerSlot } from "#app/data/trainer-config";
+import { Biome } from "#app/enums/biome";
+import { achvs } from "#app/system/achv";
 
 export class TrainerVictoryPhase extends BattlePhase {
   constructor(scene: BattleScene) {
@@ -34,11 +36,17 @@ export class TrainerVictoryPhase extends BattlePhase {
     }
 
     const trainerType = this.scene.currentBattle.trainer?.config.trainerType!; // TODO: is this bang correct?
+    // Validate Voucher for boss trainers
     if (vouchers.hasOwnProperty(TrainerType[trainerType])) {
       if (!this.scene.validateVoucher(vouchers[TrainerType[trainerType]]) && this.scene.currentBattle.trainer?.config.isBoss) {
         this.scene.unshiftPhase(new ModifierRewardPhase(this.scene, [ modifierTypes.VOUCHER, modifierTypes.VOUCHER, modifierTypes.VOUCHER_PLUS, modifierTypes.VOUCHER_PREMIUM ][vouchers[TrainerType[trainerType]].voucherType]));
       }
     }
+    // Breeders in Space achievement
+    if (this.scene.arena.biomeType === Biome.SPACE
+      && (trainerType === TrainerType.BREEDER || trainerType === TrainerType.EXPERT_POKEMON_BREEDER)) {
+      this.scene.validateAchv(achvs.BREEDERS_IN_SPACE);
+    }
 
     this.scene.ui.showText(i18next.t("battle:trainerDefeated", { trainerName: this.scene.currentBattle.trainer?.getName(TrainerSlot.NONE, true) }), null, () => {
       const victoryMessages = this.scene.currentBattle.trainer?.getVictoryMessages()!; // TODO: is this bang correct?
diff --git a/src/system/achv.ts b/src/system/achv.ts
index d94fcba48f2..a98e396264d 100644
--- a/src/system/achv.ts
+++ b/src/system/achv.ts
@@ -358,7 +358,7 @@ export const achvs = {
   MONO_FAIRY: new ChallengeAchv("MONO_FAIRY", "", "MONO_FAIRY.description", "fairy_feather", 100, (c, scene) => c instanceof SingleTypeChallenge && c.value === 18 && !scene.gameMode.challenges.some(c => c.id === Challenges.INVERSE_BATTLE && c.value > 0)),
   FRESH_START: new ChallengeAchv("FRESH_START", "", "FRESH_START.description", "reviver_seed", 100, (c, scene) => c instanceof FreshStartChallenge && c.value > 0 && !scene.gameMode.challenges.some(c => c.id === Challenges.INVERSE_BATTLE && c.value > 0)),
   INVERSE_BATTLE: new ChallengeAchv("INVERSE_BATTLE", "", "INVERSE_BATTLE.description", "inverse", 100, c => c instanceof InverseBattleChallenge && c.value > 0),
-  BREEDERS_IN_SPACE: new Achv("BREEDERS_IN_SPACE", "", "BREEDERS_IN_SPACE.description", "moon_stone", 100).setSecret(),
+  BREEDERS_IN_SPACE: new Achv("BREEDERS_IN_SPACE", "", "BREEDERS_IN_SPACE.description", "moon_stone", 50).setSecret(),
 };
 
 export function initAchievements() {