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.
Grey DeLisle
as Mandy / Aunt Sis / Kid / Ike (voice)
Greg Eagles
as Grim / Sperg / Giant Candy Bar (voice)
Richard Steven Horvitz
as Billy / Harold / Pumpkin / Trick-or-Treater Eater (voice)
Vanessa Marshall
as Irwin / Hoss's Mom (voice)
Diedrich Bader
as Hoss Delgado (voice)
Armin Shimerman
as General Skarr / Candy Skeleton / Rat / Creepy Gnome (voice)
C.H. Greenblatt
as Fred Fredburger (voice)
Maxwell Atoms
as Jeff the Spider (voice)
Phil LaMarr
as Dracula / Grandmama / Bougersnatch (voice)
Rachael MacFarlane
as Mindy (voice)
Dave Wittenberg
as Bun-Bun / Trick-or-Treater Eater #1 / Jimbo (voice)
Dan Gilvezan
as Confic / Humicun (voice)
