Mamodo Battles, known as Konjiki no Gash Bell!! Yuujou Tag Battle 2!! in Japan, is a video game that was released in 2005 by Bandai. Based on the Zatch Bell! anime series, it is a 3D fighting game. Every one thousand years, one hundred mamodo descend upon the earth to fight the ultimate battle. The winning mamodo 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 a human partner.
The game depicts the storyline of the manga and anime just prior to the Ancient Mamodo arc. There is a story mode where the player can choose one of six characters to use and play through a unique campaign for each character. The game also has a time attack mode that scores the player after battling eight opponents, and a practice mode that allows the player to train against a dummy opponent.