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.
Elenco: Devon Werkheiser , John DiMaggio , Jim Belushi , Billy West , Dan Castellaneta , Debi Derryberry , Scott Menville , Brett DelBuono , Pat Fraley , Kevin Michael Richardson , Bob Saget , Jason Harris , Matthew Underwood , Candi Milo , Nika Futterman , Christy Carlson Romano , Kendre Berry , Maurice LaMarche , Kevin McDonald , Terri Douglas , John Kassir , Phyllis Diller , Daryl Dragon , Toni Tennille , Danny Cooksey , Fred Tatasciore .