Underfist: Halloween Bash 2008
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.
- Released: 2008-10-12
- Runtime: 61 minutes
- Genre: Action, Comedy, Family, Fantasy, Animation
- Stars: Greg Eagles, Phil LaMarr, Jess Harnell, Greg Ellis, Maxwell Atoms, Grey DeLisle, Vanessa Marshall, Diedrich Bader, C.H. Greenblatt, Rachael MacFarlane, Martin Jarvis, Richard Steven Horvitz, Armin Shimerman, Dave Wittenberg, Dan Gilvezan
- Director: Shaun Cashman