Devon Werkheiser

Casper / Casper's Shadow (voice)

Brett DelBuono

Jimmy (voice)

Jim Belushi

Alder (voice)

Bob Saget

Dash (voice)

John DiMaggio

Stinkie / Frankengymteacher (voice)

Billy West

Fatso / Figurehead (voice)

Dan Castellaneta

Stretch (voice)

Kevin Michael Richardson

Kibosh (voice)

Matthew Underwood

Thatch (voice)

Christy Carlson Romano

Mantha (voice)

Candi Milo

Mickey (voice)

Nika Futterman

Monaco (voice)

Kendre Berry

Ra (voice)

Debi Derryberry

Banana Lady / History Teacher / Additional Voices (voice)

Pat Fraley

Scare Center Host 1 / Wolfie / Narrator / Werewolf / Additional Voices (voice)

Scott Menville

Punk Kid / Scare Center Host 2 / Pumpkinhead / Brainiac / Pool Guy / Hunchback / Additional Voices (voice)

Maurice LaMarche

Pirate / Thurdigree Burns (voice)

Kevin McDonald

Parrot (voice)

Terri Douglas

Fish Boy / Drip / Additional Voices (voice)

John Kassir

P.A. Voice / Additional Voices (voice)

Phyllis Diller

Aunt Spitzy (voice)

Jason Harris

Gargoyle / Flyboy / Skinny Ghost / Coach / Additional Voices (voice)

Daryl Dragon

Murray (voice)

Toni Tennille

Belle (voice)

Danny Cooksey

Additional Voices (voice)

Fred Tatasciore

Additional Voices (voice)