Fixes Multi Hit moves removing destiny bond flag in the middle of attack (#5377)

src/battle_script_commands.c

@@ -4686,7 +4686,8 @@ static void MoveValuesCleanUp(void)
     gIsCriticalHit = FALSE;
     gBattleScripting.moveEffect = 0;
     gBattleCommunication[MISS_TYPE] = 0;
-    gHitMarker &= ~HITMARKER_DESTINYBOND;
+    if (!gMultiHitCounter)
+        gHitMarker &= ~HITMARKER_DESTINYBOND;
     gHitMarker &= ~HITMARKER_SYNCHRONISE_EFFECT;
 }
 

test/battle/move_effect/destiny_bond.c

@@ -0,0 +1,17 @@
+#include "global.h"
+#include "test/battle.h"
+
+SINGLE_BATTLE_TEST("Destiny Bond faints the opposing mon if it fainted from the attack")
+{
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET) { HP(1); }
+        OPPONENT(SPECIES_WOBBUFFET);
+    } WHEN {
+        TURN { MOVE(player, MOVE_DESTINY_BOND); MOVE(opponent, MOVE_TACKLE); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_DESTINY_BOND, player);
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_TACKLE, opponent);
+        MESSAGE("Wobbuffet took Foe Wobbuffet with it!");
+        MESSAGE("Foe Wobbuffet fainted!");
+    }
+}

test/battle/move_effect/multi_hit.c

@@ -231,3 +231,28 @@ SINGLE_BATTLE_TEST("Scale Shot decreases defense and increases speed after killi
         MESSAGE("Bagon's Speed rose!");
     }
 }
+
+SINGLE_BATTLE_TEST("Multi Hit moves will not disrupt Destiny Bond flag")
+{
+    u32 hp;
+    PARAMETRIZE { hp = 11; }
+    PARAMETRIZE { hp = 55; }
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET) { HP(55); }
+        OPPONENT(SPECIES_WOBBUFFET);
+    } WHEN {
+        TURN { MOVE(player, MOVE_DESTINY_BOND); MOVE(opponent, MOVE_BULLET_SEED); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_DESTINY_BOND, player);
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_BULLET_SEED, opponent);
+        if (hp == 55)
+        {
+            ANIMATION(ANIM_TYPE_MOVE, MOVE_BULLET_SEED, opponent);
+            ANIMATION(ANIM_TYPE_MOVE, MOVE_BULLET_SEED, opponent);
+            ANIMATION(ANIM_TYPE_MOVE, MOVE_BULLET_SEED, opponent);
+            ANIMATION(ANIM_TYPE_MOVE, MOVE_BULLET_SEED, opponent);
+        }
+        MESSAGE("Wobbuffet took Foe Wobbuffet with it!");
+        MESSAGE("Foe Wobbuffet fainted!");
+    }
+}