Billy & Mandy's Jacked-Up Halloween 2003
Jack, a headless prankster from Grim's past, uses Billy to steal Grim's scythe so he can destroy Grim and take over the world with demons from the Netherworld.
- Released: 2003-10-31
- Runtime: 22 minutes
- Genre: Fantasy, Animation, Adventure, Comedy, Horror, TV Movie
- Stars: Vanessa Marshall, Greg Eagles, Wayne Knight, Billy West, Grey DeLisle, Richard Steven Horvitz
- Director: Robert Alvarez