Usage of BATTLE_PARTNER

src/battle_anim_fire.c

@@ -1228,7 +1228,7 @@ void AnimTask_MoveHeatWaveTargets(u8 taskId)
     struct Task *task = &gTasks[taskId];
 
     task->data[12] = GetBattlerSide(gBattleAnimAttacker) == B_SIDE_PLAYER ? 1 : -1;
-    task->data[13] = IsBattlerSpriteVisible(gBattleAnimTarget ^ BIT_FLANK) + 1;
+    task->data[13] = IsBattlerSpriteVisible(BATTLE_PARTNER(gBattleAnimTarget)) + 1;
     task->data[14] = GetAnimBattlerSpriteId(ANIM_TARGET);
     task->data[15] = GetAnimBattlerSpriteId(ANIM_DEF_PARTNER);