Pizza Face

Antonio was the owner of the Antonio's Pizza-Rama food chain, a famous New York City pizzeria in the 2012 TV series, at least until he was turned into the evil Pizza Face when he was exposed to a canister of mutagen in the second season

History
For a long time Antonio was just an alluded character that appeared in pizza boxes, but he was also the owner and main chef of Antonio's Pizza-Rama. As revealed in the episode Pizza Face, the incidents occured The Mutation Situation caused Antonio to find a mutagen canister and due to his culinary curiosity he tasted it hoping it would turn out a good ingredient for his beloved pizzas. The mutagen caused him to mutate into a pizza monster with the ability of creating living pizzas that would help him to capture humans for satisfy his hunger. Michelangelo was the only one who could stop him as his brothers were already under Pizza Face's control and so he literally ate his way to victory, easting the cheesy villain from his insides only leaving a slice behind that freed the humans and his brothers. Pizza Face's last slice attacked Mikey and caused him to faint, than he woke up at home and thought it all was a dream, but lurking from a pizza box in Mikey's room there was Pizza Face.

Trivia

 * His design bears similarities to Pizza the Hutt from the Mel Brooks' film Spaceballs which is a parody of Star Wars but unlike Pizza the Hutt. Pizza Face did not eat himself to death.
 * He is the second characters to have a food related mutation with the first being Ice Cream Kitty