When Casper's been being friendly lately even when playing with a boy named Jimmy, Kibosh: The King of the Underworld has Casper enrolled into a Scare School headed by the two-headed headmaster Alder and Dash. He befriends Ra, a mummy with unraveling issues and Mantha, a zombie girl who keeps falling apart. When Casper discovers the two-headed headmaster's plot to use a petrification potion to turn Kibosh into stone and take over the Underworld and Deedstown, he and his new friends must stop him.
Devon Werkheiser
as Casper / Casper's Shadow (voice)
Brett DelBuono
as Jimmy (voice)
Jim Belushi
as Alder (voice)
Bob Saget
as Dash (voice)
John DiMaggio
as Stinkie / Frankengymteacher (voice)
Billy West
as Fatso / Figurehead (voice)
Dan Castellaneta
as Stretch (voice)
Kevin Michael Richardson
as Kibosh (voice)
Matthew Underwood
as Thatch (voice)
Christy Carlson Romano
as Mantha (voice)
Candi Milo
as Mickey (voice)
Nika Futterman
as Monaco (voice)
