Wizlow the Wizard thinks he's satisfied Munch the monster's love of eating and sleeping by giving him a potion that allows him to do both at once. Munch sleeps and eats so much and gets so fat that he can't even get out of his house and play with his friends. Good-hearted as he is though, Munch cannot help what he really is, so he just chooses to keep his eating outdoors from now on.