
Underfist: Halloween Bash
Irwin, Hoss Delgado, Jeff the Spider, Fred Fredburger, and General Skarr from the "Grim Adventures of Billy and Mandy" team up to fight an evil candy army from the Underworld on Halloween.
Top Billed Cast

Grey DeLisle
Mandy / Aunt Sis / Kid / Ike (voice)

Greg Eagles
Grim / Sperg / Giant Candy Bar (voice)

Richard Steven Horvitz
Billy / Harold / Pumpkin / Trick-or-Treater Eater (voice)

Vanessa Marshall
Irwin / Hoss's Mom (voice)

Diedrich Bader
Hoss Delgado (voice)
Featured Crew

Maxwell Atoms
Storyboard Artist
Shaun Cashman
Director

Maxwell Atoms
Creator
Shaun Cashman
Supervising Producer

Maxwell Atoms
Writer

Maxwell Atoms
Executive Producer
Brian A. Miller
Executive Producer
Jennifer Pelphrey
Supervising Producer
James Silverman
Associate Producer
Drew Neumann
Music
Illya Owens
Editor

Maxwell Atoms
Art Direction