Grim Adventures of Billy & Mandy

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

Each character has special abilities, moves, and weapons to use. They also have a Mojo meter, which is a power bar that fills up as they fight. Once filled, it can be used to deal heavy damage or knock out all players.