Fun game but potentially expensive

It is really hard to earn credits. It costs 1500 just to upgrade your capture ball thing to 15. Earning credits is also a very slow process. It seems that they really want you to spend quite the amount on this game if you want to actually capture the Zuko Monsters you desire. So far I am only earning 6 credits when there is someone new to battle, or if a person I battled earlier obtained a new Zuko. (I think you can only battle a person only 1 or 2 times to earn the credits)

Fehrette about Zuko Monsters, v1.5