Billy & Mandy's Big Boogey Adventure
Storyline
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.
Where to Watch
Stream
HBO Max
HBO MaxCast
Richard Steven Horvitz
Billy / Billybot / Harold / Pale Ghoulish Juror / Chippy the Squirrel (voice) (as Richard Horvitz)
Grey DeLisle
Mandy / Mandroid / Older Mandy / Milkshakes / Some Kid (voice)
Greg Eagles
Grim / Sperg / Pirate #6
Vanessa Marshall
Irwin / Pirate #5 / Unicorn (voice)
Maxwell Atoms
I'll Cut You Guy / Pirate #2 / Horrorbot / Burnt Skeleton Guard (voice)
