Jimmy Pesto

James "Jimmy" Poplopovich, Sr, better known as Jimmy Pesto, is the owner of Jimmy Pesto's Pizzeria and is Bob's primary business rival. He is the main antagonist of the show. Jimmy is the father of Jimmy Pesto, Jr., Tina's primary love interest, and twin boys Andy & Ollie Pesto. In The Belchies, it is implied he is divorced from his sons mother, stating "I thought you guys were with your mother!", to the twins. In the episode Bad Tina one of the twins reaches into his back pack and says. "Cool! Mom packed me tampons for lunch!", but her name or appearance have yet to be heard or seen, respectively. Andy and Ollie have mentioned having an aunt but it is unclear whether it's his sister or their mother's.

He is voiced by Jay Johnston.