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.

IMDb rating	8.4
Producers	Cartoon Network Studios
Original title	Billy & Mandy's Jacked-Up Halloween
Directors	Juli Murphy, Robert Alvarez
Writers	Brett Varon, Paul McEvoy, Maxwell Atoms

Cast

Grey DeLisle-Griffin

as Mandy/Granny/Cowgirl (voice)

Greg Eagles

as Grim/Spirit/Knight (voice)

Richard Steven Horvitz

as Billy/Guy (voice)

Wayne Knight

as Jack (voice)

Vanessa Marshall

as Irwin/Toilet Paper Woman (voice)

Billy West

as Giant Pumpkin/Lumber Jack/Announcer/Cell Phone Guy (voice)