Why Not Monster?

This is a cereal box design I'm doing for my storyboarding class. It features main Mug Cub member Joel, but this can't actually be used in the official senior project. Joel, you see, is a monster, but this is never actually mentioned in the show. Joel serves as a comment on the universe these characters exist in. There are weird, sci-fi things going on here, but some of them are just normal. It's up to me to spell out what's normal and what isn't.