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)