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Underfist: Halloween Bash is an American animated spin-off special of The Grim Adventures of Billy & Mandy. It originally aired on Cartoon Network on October 12, 2008. The special was going to be the setup for a new series spin-off of Grim & Evil, but Maxwell Atoms's contract with Cartoon Network expired before he moved to Disney Channel for the TV series Fish Hooks, and the special was ultimately the finale of the Grim & Evil franchise.
Original Release
10/12/2008
US Release
10/12/2008
Cast
| Name | Character |
|---|
| Grey Griffin | Mandy / Aunt Sis / Kid / Ike / Ike (voice) |
| Greg Eagles | Grim / Sperg / Giant Candy Bar / Giant Candy Bar (voice) |
| Richard Steven Horvitz | Billy / Harold / Pumpkin / Trick-or-Treater Eater #2 / Trick-or-Treater Eater (voice) |
| Vanessa Marshall | Irwin / Hoss's Mom / Hoss's Mom (voice) |
| Diedrich Bader | Hoss Delgado / Hoss Delgado (voice) |
| Armin Shimerman | General Skarr / Candy Skeleton / Rat / Creepy Gnome / Creepy Gnome (voice) |
| C.H. Greenblatt | Fred Fredburger / Fred Fredburger (voice) |
| Phil LaMarr | Dracula / Grandmama / Bougersnatch / Bougersnatch (voice) |
| Rachael MacFarlane | Mindy / Mindy (voice) |
| Dave Wittenberg | Bun-Bun / Trick-or-Treater Eater #1 / Jimbo / Jimbo (voice) |
Directors
Writers
Creators
Cast
| Name | Character |
|---|
| Grey Griffin | Mandy / Aunt Sis / Kid / Ike / Ike (voice) |
| Greg Eagles | Grim / Sperg / Giant Candy Bar / Giant Candy Bar (voice) |
| Richard Steven Horvitz | Billy / Harold / Pumpkin / Trick-or-Treater Eater #2 / Trick-or-Treater Eater (voice) |
| Vanessa Marshall | Irwin / Hoss's Mom / Hoss's Mom (voice) |
| Diedrich Bader | Hoss Delgado / Hoss Delgado (voice) |
| Armin Shimerman | General Skarr / Candy Skeleton / Rat / Creepy Gnome / Creepy Gnome (voice) |
| C.H. Greenblatt | Fred Fredburger / Fred Fredburger (voice) |
| Phil LaMarr | Dracula / Grandmama / Bougersnatch / Bougersnatch (voice) |
| Rachael MacFarlane | Mindy / Mindy (voice) |
| Dave Wittenberg | Bun-Bun / Trick-or-Treater Eater #1 / Jimbo / Jimbo (voice) |
| Greg Ellis | Perkins / Peanutbutter Wheel / Tiny Skull / Tiny Skull (voice) |
| Dan Gilvezan | Confic / Humicun / Humicun (voice) |
| Jess Harnell | Singer / Singer (voice) |
| Martin Jarvis | Nergai / Police Officer / Tarvis / Nergal / Tarvis (voice) |
| Maxwell Atoms | Jeff the Spider / Jeff the Spider (voice) |
Producers
| Name | Role |
|---|
| Maxwell Atoms | Executive Producer |
| Brian A. Miller | Executive Producer |
| Shaun Cashman | Producer |
| Jennifer Pelphrey | Producer |
| James Silverman | Producer |
