When Grim’s Mojo Balls get unleashed into Endsville, causing normal people to senselessly beat the tar out of each other (according to Grim, anyone touched by a Mojo Ball will be infected by supernatural rage), it’s up to Billy, Mandy, Grim, Irwin and all of Endsville to save the world. They trek through places from their episodes such as the underworld, the pumpkin patch, even Billy’s backyard. In the end, it turns out that Billy is to blame for the release of the Mojo Balls (he wanted to free Moe and Joe) and is severely punished by Mandy in the end credits (she mentioned that she hoped if the game had a mode which she and the others could just beat on Billy). During the credits you get to play as Mandy and beat Billy senseless with a flamethrower, melee attacks, and thor’s hammer. (This is the only point in the game where Billy does nothing to cause damage to the player in return).