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)

Greg Ellis as Perkins / Peanutbutter Wheel / Tiny Skull (voice)

Jess Harnell as Singer (voice)

Martin Jarvis as Nergal / Police Officer / Tarvis (voice)