That would be a reference to "The Grim Adventures of Billy & Mandy," the '00s Cartoon Network show about two kids, Billy and Mandy, who befriend the Grim Reaper after beating him in a game.

Super Snowmobile Rally is a crossover Cartoon Network game, with The Grim Adventures of Billy & Mandy characters featured on it. Advertisement Super Snowmobile Rally is a crossover Cartoon Network ...

The loss of more of the Cartoon Network classic shows on the platform with Ed, Edd n’ Eddy and The Grim Adventures of Billy & Mandy unfortunately falls in line with some of the other removals ...