From 0e33bf916e80e4dcf4f96ca0419a8b2fda5da51d Mon Sep 17 00:00:00 2001
From: moostoet <70690976+moostoet@users.noreply.github.com>
Date: Sat, 3 Jan 2026 08:50:17 +0100
Subject: [PATCH] Fix berry activation timing for Yawn sleep and Leech Seed
 damage (#8776)

---
 data/battle_scripts_1.s               |  2 ++
 include/constants/hold_effects.h      |  1 +
 src/battle_script_commands.c          |  4 ++++
 test/battle/hold_effect/cure_status.c | 19 +++++++++++++++++++
 test/battle/hold_effect/restore_hp.c  | 19 +++++++++++++++++++
 5 files changed, 45 insertions(+)

diff --git a/data/battle_scripts_1.s b/data/battle_scripts_1.s
index e37074b339..b7abe25190 100644
--- a/data/battle_scripts_1.s
+++ b/data/battle_scripts_1.s
@@ -4958,6 +4958,7 @@ BattleScript_LeechSeedTurnDrain:
 	healthbarupdate BS_ATTACKER, PASSIVE_HP_UPDATE
 	datahpupdate BS_ATTACKER, PASSIVE_HP_UPDATE
 	tryfaintmon BS_ATTACKER
+	tryactivateitem BS_ATTACKER, ACTIVATION_ON_HP_THRESHOLD
 	return
 
 BattleScript_BideStoringEnergy::
@@ -6294,6 +6295,7 @@ BattleScript_YawnMakesAsleepEnd2::
 	waitmessage B_WAIT_TIME_LONG
 	updatestatusicon BS_EFFECT_BATTLER
 	waitstate
+	tryactivateitem BS_EFFECT_BATTLER, ACTIVATION_ON_STATUS_CHANGE
 	jumpfifsemiinvulnerable BS_EFFECT_BATTLER, STATE_SKY_DROP, BattleScript_YawnEnd
 	makevisible BS_EFFECT_BATTLER
 	skydropyawn
diff --git a/include/constants/hold_effects.h b/include/constants/hold_effects.h
index 32dacc36d3..8be7b39bf2 100644
--- a/include/constants/hold_effects.h
+++ b/include/constants/hold_effects.h
@@ -157,6 +157,7 @@ enum ItemActivationState
     ACTIVATION_ON_PICK_UP,
     ACTIVATION_ON_HARVEST,
     ACTIVATION_ON_HP_THRESHOLD,
+    ACTIVATION_ON_STATUS_CHANGE,
 };
 
 #endif // GUARD_HOLD_EFFECTS_H
diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 126bb76d4c..edbe3f89ea 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -12211,6 +12211,10 @@ static void Cmd_tryactivateitem(void)
         if (ItemBattleEffects(battler, 0, GetBattlerHoldEffect(battler), IsOnHpThresholdActivation))
             return;
         break;
+    case ACTIVATION_ON_STATUS_CHANGE:
+        if (ItemBattleEffects(battler, 0, GetBattlerHoldEffect(battler), IsOnStatusChangeActivation))
+            return;
+        break;
     }
 }
 
diff --git a/test/battle/hold_effect/cure_status.c b/test/battle/hold_effect/cure_status.c
index 0f389af4d5..0318d3991a 100644
--- a/test/battle/hold_effect/cure_status.c
+++ b/test/battle/hold_effect/cure_status.c
@@ -116,6 +116,25 @@ SINGLE_BATTLE_TEST("Chesto and Lum Berries cure sleep")
     }
 }
 
+SINGLE_BATTLE_TEST("Chesto Berry cures sleep when Yawn takes effect")
+{
+    GIVEN {
+        ASSUME(GetMoveEffect(MOVE_YAWN) == EFFECT_YAWN);
+        ASSUME(gItemsInfo[ITEM_CHESTO_BERRY].holdEffect == HOLD_EFFECT_CURE_SLP);
+        PLAYER(SPECIES_WOBBUFFET) { Item(ITEM_CHESTO_BERRY); }
+        OPPONENT(SPECIES_WOBBUFFET);
+    } WHEN {
+        TURN { MOVE(opponent, MOVE_YAWN); }
+        TURN { MOVE(opponent, MOVE_CELEBRATE); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_YAWN, opponent);
+        ANIMATION(ANIM_TYPE_STATUS, B_ANIM_STATUS_SLP, player);
+        STATUS_ICON(player, sleep: TRUE);
+        ANIMATION(ANIM_TYPE_GENERAL, B_ANIM_HELD_ITEM_EFFECT, player);
+        STATUS_ICON(player, sleep: FALSE);
+    }
+}
+
 TO_DO_BATTLE_TEST("Chesto and Lum Berries don't trigger if the holder has Comatose")
 
 SINGLE_BATTLE_TEST("Cheri and Lum Berries cure paralysis")
diff --git a/test/battle/hold_effect/restore_hp.c b/test/battle/hold_effect/restore_hp.c
index ef96ead7e4..2441e92449 100644
--- a/test/battle/hold_effect/restore_hp.c
+++ b/test/battle/hold_effect/restore_hp.c
@@ -63,3 +63,22 @@ DOUBLE_BATTLE_TEST("Restore HP Item effects do not miss timing after a recoil mo
         ANIMATION(ANIM_TYPE_MOVE, MOVE_CELEBRATE, playerRight);
     }
 }
+
+SINGLE_BATTLE_TEST("Sitrus Berry restores HP immediately after Leech Seed damage")
+{
+    GIVEN {
+        ASSUME(GetMoveEffect(MOVE_LEECH_SEED) == EFFECT_LEECH_SEED);
+        ASSUME(gItemsInfo[ITEM_SITRUS_BERRY].holdEffect == HOLD_EFFECT_RESTORE_PCT_HP);
+        PLAYER(SPECIES_WOBBUFFET) { MaxHP(80); HP(41); Item(ITEM_SITRUS_BERRY); }
+        OPPONENT(SPECIES_WYNAUT);
+    } WHEN {
+        TURN { MOVE(opponent, MOVE_LEECH_SEED); }
+        TURN { }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_LEECH_SEED, opponent);
+        ANIMATION(ANIM_TYPE_GENERAL, B_ANIM_LEECH_SEED_DRAIN, player);
+        HP_BAR(player);
+        ANIMATION(ANIM_TYPE_GENERAL, B_ANIM_HELD_ITEM_EFFECT, player);
+        HP_BAR(player);
+    }
+}