Grim Adventures of Billy & Mandy

The story begins when Grim's Mojo Balls are unleashed into Endsville, causing all the residents to gain supernatural rage and leading to mass fighting and mayhem. It's up to Grim, Billy, Mandy, and Irwin to figure out who released the balls.

Each character in the game has special abilities, moves, and weapons to use. They also have a Mojo meter, which is a power bar that fills up as they attack or defend. When the meter is full, it can be used to deal heavy damage, and if filled twice, it can knock out all players.