Billy & Mandy's Jacked-Up Halloween
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.
- Year: 2003
- Country: United States of America
- Genre: Animation, Comedy, Adventure, Horror
- Studio: Cartoon Network Studios
- Keyword:
- Director: Robert Alvarez, Juli Murphy
- Cast: Grey DeLisle, Greg Eagles, Richard Steven Horvitz, Wayne Knight, Vanessa Marshall, Billy West