Billy & Mandy's Big Boogey Adventure

Billy & Mandy's Big Boogey Adventure is an American animated comedy Christmas film produced by Cartoon Network Studios, based on the series The Grim Adventures of Billy & Mandy. When the underworld strips Grim of his powers, Billy, Mandy, Grim and Irwin must race the Boogeyman and a crew of monster pirates to capture a powerful artifact capable of making whoever wields it into the scariest being alive.