diff --git a/data/battle_scripts_1.s b/data/battle_scripts_1.s
index fa59e58ce6..769ef1daae 100644
--- a/data/battle_scripts_1.s
+++ b/data/battle_scripts_1.s
@@ -6189,6 +6189,25 @@ BattleScript_IllusionOff::
 	waitmessage 0x40
 	return
 
+BattleScript_CottonDownActivates::
+	setbyte gBattlerTarget, 0x1
+BattleScript_CottonDownLoop:
+	setstatchanger STAT_SPEED, 1, TRUE
+	statbuffchange STAT_BUFF_NOT_PROTECT_AFFECTED | STAT_BUFF_ALLOW_PTR, BattleScript_CottonDownActivatesLoopIncrement
+	jumpifbyte CMP_EQUAL, cMULTISTRING_CHOOSER, 0x2, BattleScript_CottonDownEnd
+	call BattleScript_AbilityPopUp
+	setgraphicalstatchangevalues
+	playanimation BS_TARGET, B_ANIM_STATS_CHANGE, sB_ANIM_ARG1
+	setbyte gBattleCommunication STAT_SPEED
+	stattextbuffer BS_TARGET
+	printfromtable gStatDownStringIds
+	waitmessage 0x40
+BattleScript_CottonDownActivatesLoopIncrement:
+	addbyte gBattlerTarget, 0x1
+	jumpifbytenotequal gBattlerTarget, gBattlersCount, BattleScript_CottonDownLoop
+BattleScript_CottonDownEnd:
+	end3
+
 BattleScript_AnticipationActivates::
 	pause 0x5
 	call BattleScript_AbilityPopUp
diff --git a/include/battle_scripts.h b/include/battle_scripts.h
index 7799e721fb..62c5ce2e0e 100644
--- a/include/battle_scripts.h
+++ b/include/battle_scripts.h
@@ -351,5 +351,6 @@ extern const u8 BattleScript_EmergencyExitWildNoPopUp[];
 extern const u8 BattleScript_CheekPouchActivates[];
 extern const u8 BattleScript_AnnounceAirLockCloudNine[];
 extern const u8 BattleScript_TargetAbilityStatRaiseOnSwitchin[];
+extern const u8 BattleScript_CottonDownActivates[];
 
 #endif // GUARD_BATTLE_SCRIPTS_H
diff --git a/src/battle_util.c b/src/battle_util.c
index ef414b7110..9372fe6942 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -4608,6 +4608,21 @@ u8 AbilityBattleEffects(u8 caseID, u8 battler, u16 ability, u8 special, u16 move
                 effect++;
             }
             break;
+        case ABILITY_COTTON_DOWN:
+            if (!(gMoveResultFlags & MOVE_RESULT_NO_EFFECT)
+             && gBattleMons[gBattlerTarget].hp != 0
+             && !gProtectStructs[gBattlerAttacker].confusionSelfDmg
+             && TARGET_TURN_DAMAGED)
+            {
+                for (i = 0; i < gBattlersCount; i++)
+                {
+                    gBattlerAttacker = i;
+                    BattleScriptPushCursorAndCallback(BattleScript_CottonDownActivates);
+                    effect++;
+                    break;
+                }
+            }
+            break;
         }
         break;
     case ABILITYEFFECT_MOVE_END_ATTACKER: // Same as above, but for attacker