In "Big Trouble in Billy's Basement" Billy steals Grim's "bad book" and starts an apocalypse, which Mandy, Grim, and Hoss Delgado must stop. In "Tickle Me Mandy" Mandy goes away for a day, so Grim makes Billy a new Mandy to play with.
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Rupert The Reindeer
[while lifting weights
Two hundred ninety six, Two hundred ninety seven, Two hundred ninety eight, Two hundred ninety nine, three hundred million!