Devon Werkheiser

Casper / Casper's Shadow (voice)

Jim Belushi

Alder (voice)

Billy West

Fatso / Figurehead (voice)

Dan Castellaneta

Stretch (voice)

John DiMaggio

Stinkie / Frankengymteacher (voice)

Debi Derryberry

Banana Lady / History Teacher / Additional Voices (voice)

Scott Menville

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

Brett DelBuono

Jimmy (voice)

Pat Fraley

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

Kevin Michael Richardson

Kibosh (voice)

Bob Saget

Dash (voice)

Jason Harris

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

Matthew Underwood

Thatch (voice)

Candi Milo

Mickey

Nika Futterman

Monaco (voice)

Christy Carlson Romano

Mantha (voice)

Kendre Berry

Ra (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)

Daryl Dragon

Murray (voice)

Toni Tennille

Belle (voice)

Danny Cooksey

Additional Voices (voice)

Fred Tatasciore

Additional Voices (voice)