The Grim Adventures of Billy and Mandy S06 E05 Major Cheese

"It's Good Grim Fun!"

Billy, Mandy and Grim visit Mighty Moe, an old man who has discovered the secret to add extra years to his lifespan: a good diet and exercise. Mighty Moe decides to publish his secret in a book, and Grim needs to stop him by offering junk food.