The Grim Adventures of Billy and Mandy: Who Killed Who?/Tween Wolf

"Who Killed Who?" Billy tries to forbid Mandy from playing the board game "Who Killed Who?," because she's a girl. But when he loses the game dice over the wall of old Mrs. Doolin's haunted house, Mandy is not afraid to get them and Billy is. "Tween Wolf" Grim throws away his magic cap, which Irwin picks up. Inside the hat, Irwin pulls out a werewolf, which he soon turns into. Billy finds Irwin and takes him home to be his dog.