diff --git a/src/data/move.ts b/src/data/move.ts
index d781f4a046b..9e0376c991b 100644
--- a/src/data/move.ts
+++ b/src/data/move.ts
@@ -2887,62 +2887,79 @@ export class SecretPowerAttr extends MoveEffectAttr {
       switch (terrain) {
       case TerrainType.ELECTRIC:
         secondaryEffect = new StatusEffectAttr(StatusEffect.PARALYSIS, false);
-        return secondaryEffect.apply(user, target, move, []);
+        break;
       case TerrainType.MISTY:
         secondaryEffect = new StatStageChangeAttr([ Stat.SPATK ], -1, false);
-        return secondaryEffect.apply(user, target, move, []);
+        break;
       case TerrainType.GRASSY:
         secondaryEffect = new StatusEffectAttr(StatusEffect.SLEEP, false);
-        return secondaryEffect.apply(user, target, move, []);
+        break;
       case TerrainType.PSYCHIC:
         secondaryEffect = new StatStageChangeAttr([ Stat.SPD ], -1, false);
-        return secondaryEffect.apply(user, target, move, []);
+        break;
       }
     }
     const biome = user.scene.arena.biomeType;
     switch (biome) {
     case Biome.TOWN:
+    case Biome.METROPOLIS:
+    case Biome.SLUM:
+    case Biome.DOJO:
+    case Biome.FACTORY:
+    case Biome.CONSTRUCTION_SITE:
+    case Biome.LABORATORY:
+    case Biome.POWER_PLANT:
+      secondaryEffect = new StatusEffectAttr(StatusEffect.PARALYSIS, false);
+      break;
     case Biome.PLAINS:
-      secondaryEffect = new StatusEffectAttr(StatusEffect.SLEEP, false);
-      return secondaryEffect.apply(user, target, move, []);
     case Biome.GRASS:
     case Biome.TALL_GRASS:
-    case Biome.METROPOLIS:
     case Biome.FOREST:
-    case Biome.SEA:
+    case Biome.JUNGLE:
+    case Biome.MEADOW:
+      secondaryEffect = new StatusEffectAttr(StatusEffect.SLEEP, false);
+      break;
     case Biome.SWAMP:
+      secondaryEffect = new StatStageChangeAttr([ Stat.SPD ], -1, false);
+      break;
+    case Biome.ICE_CAVE:
+    case Biome.SNOWY_FOREST:
+      secondaryEffect = new StatusEffectAttr(StatusEffect.FREEZE, false);
+      break;
+    case Biome.VOLCANO:
+      secondaryEffect = new StatusEffectAttr(StatusEffect.BURN, false);
+      break;
+    case Biome.FAIRY_CAVE:
+      secondaryEffect = new StatStageChangeAttr([ Stat.SPATK ], -1, false);
+      break;
+    case Biome.DESERT:
+      secondaryEffect = new StatStageChangeAttr([ Stat.ACC ], -1, false);
+      break;
+    case Biome.SEA:
     case Biome.BEACH:
     case Biome.LAKE:
+    case Biome.ISLAND:
     case Biome.SEABED:
+      secondaryEffect = new StatStageChangeAttr([ Stat.ATK ], -1, false);
+      break;
     case Biome.MOUNTAIN:
     case Biome.BADLANDS:
     case Biome.CAVE:
-    case Biome.DESERT:
-    case Biome.ICE_CAVE:
-    case Biome.MEADOW:
-    case Biome.POWER_PLANT:
-    case Biome.VOLCANO:
-    case Biome.GRAVEYARD:
-    case Biome.DOJO:
-    case Biome.FACTORY:
-    case Biome.RUINS:
     case Biome.WASTELAND:
+      secondaryEffect = new AddBattlerTagAttr(BattlerTagType.FLINCHED, false, true);
+      break;
+    case Biome.GRAVEYARD:
+    case Biome.RUINS:
     case Biome.ABYSS:
     case Biome.SPACE:
-    case Biome.CONSTRUCTION_SITE:
-    case Biome.JUNGLE:
-    case Biome.FAIRY_CAVE:
     case Biome.TEMPLE:
-    case Biome.SLUM:
-    case Biome.SNOWY_FOREST:
-    case Biome.ISLAND:
-    case Biome.LABORATORY:
     case Biome.END:
     default:
-      break;
+      return true;
     }
-    return true;
+    return secondaryEffect.apply(user, target, move, []);
   }
+
 }
 
 export class PostVictoryStatStageChangeAttr extends MoveAttr {