From 8f59d9c94fcd29163b5c03ebc2389aef4ea8de79 Mon Sep 17 00:00:00 2001
From: Alex <93446519+AlexOn1ine@users.noreply.github.com>
Date: Wed, 18 Dec 2024 21:39:32 +0100
Subject: [PATCH] Fixes Shed Tail substitute health (#5826)

---
 src/battle_script_commands.c        |  5 ++++-
 test/battle/move_effect/shed_tail.c | 23 +++++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/src/battle_script_commands.c b/src/battle_script_commands.c
index 1d03cf3f5612..7d342b0b733b 100644
--- a/src/battle_script_commands.c
+++ b/src/battle_script_commands.c
@@ -12638,7 +12638,10 @@ static void Cmd_setsubstitute(void)
 
         gBattleMons[gBattlerAttacker].status2 |= STATUS2_SUBSTITUTE;
         gBattleMons[gBattlerAttacker].status2 &= ~STATUS2_WRAPPED;
-        gDisableStructs[gBattlerAttacker].substituteHP = gBattleMoveDamage;
+        if (factor == 2)
+            gDisableStructs[gBattlerAttacker].substituteHP = gBattleMoveDamage / 2;
+        else
+            gDisableStructs[gBattlerAttacker].substituteHP = gBattleMoveDamage;
         gBattleCommunication[MULTISTRING_CHOOSER] = B_MSG_SET_SUBSTITUTE;
         gHitMarker |= HITMARKER_IGNORE_SUBSTITUTE;
     }
diff --git a/test/battle/move_effect/shed_tail.c b/test/battle/move_effect/shed_tail.c
index 51d7652460af..6e337f4fe71f 100644
--- a/test/battle/move_effect/shed_tail.c
+++ b/test/battle/move_effect/shed_tail.c
@@ -99,3 +99,26 @@ AI_SINGLE_BATTLE_TEST("AI will use Shed Tail to pivot to another mon while in da
         TURN { MOVE(player, MOVE_TACKLE); EXPECT_MOVE(opponent, MOVE_SHED_TAIL); }
     }
 }
+
+SINGLE_BATTLE_TEST("Shed Tail creates a Substitute with 1/4 of user maximum health")
+{
+    u32 hp;
+    PARAMETRIZE { hp = 160; }
+    PARAMETRIZE { hp = 164; }
+
+    GIVEN {
+        ASSUME(gMovesInfo[MOVE_DRAGON_RAGE].argument == 40);
+        ASSUME(gMovesInfo[MOVE_DRAGON_RAGE].effect == EFFECT_FIXED_DAMAGE_ARG);
+        PLAYER(SPECIES_BULBASAUR) { MaxHP(hp); }
+        PLAYER(SPECIES_BULBASAUR);
+        OPPONENT(SPECIES_CHARMANDER);
+    } WHEN {
+        TURN { MOVE(player, MOVE_SHED_TAIL); MOVE(opponent, MOVE_DRAGON_RAGE); SEND_OUT(player, 1); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_SHED_TAIL, player);
+        if (hp == 160)
+            MESSAGE("Bulbasaur's substitute faded!");
+        else
+            NOT MESSAGE("Bulbasaur's substitute faded!");
+    }
+}