Every 1000 years, Mamodo cross over to our dimension and battle it out in constant fights. The winner of this competition becomes the leader of the Mamodo. But, in order to unlock their magical abilities and truly excel in the fights, each character must team up with a human to use the Mamodo's magical attacks.
Zatch Bell! Mamodo Battles follows Zatch, Tia, Kanchome, Brago, Zofis and their partners as they try to claim the throne.
The game's Story Mode lets you choose one of the major characters and follow their attempt to become ruler of the Mamodo. The TV series, and one of the stories, follows Zatch who was found years earlier (before the other Mamodos appeared) in some woods by an archaeologist. Zatch had no memory of the other world and befriends the scientist's son, Kiyo.
Now other Mamodo are appearing and Zatch is finding himself thrown into dozens of battles. What's odd is that all of these other Mamodo seem to know him and don't seem to want to tell him about his past.
As you progress through the story, you will find or earn points. These points can be used to up your unlocked characters' Health, Magic or Strength. You will also unlock several characters in this mode, but unlike most fighters, Story Mode isn't the only mode that you will be able to unlock stuff in.
Zatch Bell! also has a Time Attack Mode where you battle through eight stages of fights as fast as possible. If you can do it without continuing once, you're chance of unlocking another character is increased. There are also 1P and 2P modes that let you play against another person or the computer. The game's Practice Mode lets you hone your skills with a particular fighter and Bonus Mode lets you buy game cards or view the purchased cards. Though these cards don't have any bearing on the game as a whole, it is a nice addition for the completest bastards out there, as it definitely extends overall game time.