I'm edit my comment before. Yes that cheat is WORKING. But it seems all my stats value is more than 1000, that's why i need to press reduce 500 atk value 12 times before get attack stats reduced to 777. Thanks..
After A LOOOOOONG time searching the Web I found a Neat tool to cheat in games like this one. its called Toybox. Something intended for developers to test out things but works just fine if you manage to figure it out :-D
