Well, you don't need to debug it. (Check your other topic for my post about mimitchi/mamitchi.) But if you'd wish to debug your tama (wish cannot be undone easily and may mess things up) go here to learn how. But instead of that, maybe you could:
•Feed your tama lots to make them 99 pounds
•Play games and never give any snacks
•Get full training
•Get little training
•Connect a lot
Try one of these things and you might get a different character!
EDIT: Also, go to Pixelmood for debugging guide and pictures!