- Summary: Every one thousand years, one hundred mamodo descend upon earth to conduct the ultimate battle. The winner becomes the mighty king of the mamodo world. There is only one problem - in order for the mamodo to use their powerful spell books, they need human partners. Partner up your favorite mamodo and human characters and battle to become the mighty mamodo king.… Expand
Overall, Zatch Bell! Electric Arena isn't too difficult nor too lengthy; about 5 hours or so from start to finish should get most, if not all of the characters unlocked. However, the more patient/persistent kids will have quite a bit of fun unlocking all the gallery items and other three mini-games.