The characters Mrs Crabtree, Chickenlover and a clown were originally intended to be playable characters and not just level obstacles. This is suggested by the character menu portraits and sound files found in the game's files.
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Despite only being not playable in the Nintendo 64 version, the characters Ms Cartman, Mrs Broflovski, and Scuzzlebutt, and extra skins for characters, can be found in the game's files.
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Mephesto's vehicle is the DeLorean time machine from "Back to the Future".
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