Big Trouble in Billy's Basement/Christmas Con Carne/Tickle Me Mandy

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. (imdb)