When the Boogey Man causes Grim to lose his powers, rank, and title in the Underworld Court for misusing his powers, he plots to seek out Horror's Hand and take over the world. It's up to Billy, Mandy, Irwin, and Grim to get to Horror's Hand before the Boogey Man does.
Richard Steven Horvitz
as Billy / Billybot / Harold / Pale Ghoulish Juror / Chippy the Squirrel (voice) (as Richard Horvitz)
Grey DeLisle
as Mandy / Mandroid / Older Mandy / Milkshakes / Some Kid (voice)
Greg Eagles
as Grim / Sperg / Pirate #6
Vanessa Marshall
as Irwin / Pirate #5 / Unicorn (voice)
Maxwell Atoms
as I'll Cut You Guy / Pirate #2 / Horrorbot / Burnt Skeleton Guard (voice)
George Ball
as Peequay (voice)
Jane Carr
as Bride of Frankenstein (voice)
Greg Ellis
as Creeper / Horror's Hand / Pirate #3 / Paperboy (voice)
Bart Flynn
as Giant Cyclops / Ugly Pirate (voice)
C.H. Greenblatt
as Fred Fredburger / Pirate #4 (voice)
Jennifer Hale
as Billy's Mom (voice)
Dorian Harewood
as Older Irwin (voice)
