I wanted to redesign certain enemies from the Super Mario Bros. to give them the pizza-esque feel to it. I started off with a Piranha Plant and turned it into a pepperoni pizza. However, that sparked my creative juices even more, and added a few more based on pizza toppings and Bowser's minions.
Why hasn't Nintendo tried out these variations? That would've been cool.
Bowser's Minions (c) Nintendo