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)