Fix toxic debris setting hazards on the wrong side when hit by an ally (#8026)

data/battle_scripts_1.s

@@ -6048,9 +6048,8 @@ BattleScript_ToxicDebrisActivates::
 	printstring STRINGID_POISONSPIKESSCATTERED
 	waitmessage B_WAIT_TIME_LONG
 BattleScript_ToxicDebrisRet:
-	copybyte sBATTLER, gBattlerTarget
-	copybyte gBattlerTarget, gBattlerAttacker
-	copybyte gBattlerAttacker, sBATTLER
+	restoretarget
+	restoreattacker
 	return
 
 BattleScript_EarthEaterActivates::

src/battle_util.c

@@ -4959,7 +4959,10 @@ u32 AbilityBattleEffects(u32 caseID, u32 battler, u32 ability, u32 special, u32
              && IsBattlerTurnDamaged(gBattlerTarget)
              && (gSideTimers[GetBattlerSide(gBattlerAttacker)].toxicSpikesAmount != 2))
             {
-                SWAP(gBattlerAttacker, gBattlerTarget, i);
+                SaveBattlerTarget(gBattlerTarget);
+                SaveBattlerAttacker(gBattlerAttacker);
+                gBattlerAttacker = gBattlerTarget;
+                gBattlerTarget = BATTLE_OPPOSITE(gBattlerAttacker);
                 BattleScriptCall(BattleScript_ToxicDebrisActivates);
                 effect++;
             }

test/battle/ability/toxic_debris.c

@@ -120,3 +120,23 @@ SINGLE_BATTLE_TEST("Air Balloon is popped after Toxic Debris activates")
         MESSAGE("Glimmora's Air Balloon popped!");
     }
 }
+
+DOUBLE_BATTLE_TEST("Toxic Debris sets Toxic Spikes on the opposing side even when hit by an ally")
+{
+    struct BattlePokemon *user = NULL;
+
+    PARAMETRIZE{ user = opponentLeft; }
+    PARAMETRIZE{ user = opponentRight; }
+    PARAMETRIZE{ user = playerRight; }
+    GIVEN {
+        PLAYER(SPECIES_GLIMMORA) { Ability(ABILITY_TOXIC_DEBRIS); }
+        PLAYER(SPECIES_WYNAUT) { }
+        OPPONENT(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_WYNAUT) { }
+    } WHEN {
+        TURN { MOVE(user, MOVE_SCRATCH, target: playerLeft); }
+    } SCENE {
+        ABILITY_POPUP(playerLeft, ABILITY_TOXIC_DEBRIS);
+        MESSAGE("Poison spikes were scattered on the ground all around the opposing team!");
+    }
+}