Gourmet Guy is an important Fat Guy that appears in Paper Mario as a minion of Bowser. He is easily bribed with food, especially cake. He has been shown to be hyper, as when Mario feeds him a cake, he starts flying around like a rocket everywhere.
Gourmet Guy also appears at the end-of-game parade, where the Fearsome 5, a group of Yoshis, devour Huff n' Puff. This disappointed Gourmet Guy who was planning to do the same thing.