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.
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Casper's Scare School is a 2006 animated television film based on the Harvey Comics cartoon character Casper the Friendly Ghost. The film premiered on Cartoon Network on October 20, 2006. It was produced by Classic Media. A TV series of the same name was produced in 2009, as well as a 2008 video game of the same name.
