Cast and credits of Billy & Mandy's Big Boogey Adventure

Juli Murphy

Sue Perrotto

Michel Lyman

Shaun Cashman

Grey DeLisle
Mandy / Mandroid / Older Mandy / Milkshakes / Some Kid (voice) (as Grey DeLisle)

Greg Eagles
Grim / Sperg / Pirate #6 (voice)

Richard Steven Horvitz
Billy / Billybot / Harold / Pale Ghoulish Juror / Chippy the Squirrel (voice) (as Richard Horvitz)

Vanessa Marshall
Irwin / Pirate #5 / Unicorn (voice)

Maxwell Atoms
I'll Cut You Guy / Pirate #2 / Horrorbot / Burnt Skeleton Guard (voice)

Jane Carr
Bride of Frankenstein (voice)

Greg Ellis
Creeper / Horror's Hand / Pirate #3 / Paperboy (voice)

C.H. Greenblatt
Fred Fredburger / Pirate #4 (voice)

Jennifer Hale
Billy's Mom (voice)

Dorian Harewood
Older Irwin (voice)

Phil LaMarr
Space Villain / Glacier of Evil / Dracula / Judge Roy Spleen / Underworld Cop (voice)

Rachael MacFarlane
2 Headed Parrot (voice)

George Segal
Horror (voice)

Armin Shimerman
General Skarr / Pirate #7 (voice)

Lauren Tom
Numbuh Three (voice)

Billy West
Pirate #8 / Miniature Cyclops / Spider Clown Mailman / Beast Master (voice)

Fred Willard
The Boogey Man (voice)

Maxwell Atoms
(story)

Jeremy J. Bargiel
(written by) (as Jeremy Bargiel)