| Character Information
Quattro Pepperoni is an anthropomorphic pepperoni pizza (it being mostly his head) with a body attached. He wears a steel blue job outfit, along with a sailor's cap.
- "The Job": He appears in a sight gag when Gumball and Darwin dropped his pizza, which shocks him, along with his wife. (He thought of the pizza they delivered as an infant he and his wife were going to adopt).
- "Christmas": He appears at the final scene, along with the rest of the families in the Wattersons' neighborhood.
- "The Pony": He is seen in a queue at Ripley 2000.
- "The Hero": He is seen in a flashback of Richard dancing, watching him dance in the street.
- "The Boombox": He is seen on an airplane during a commercial.
- "The Tape": He appears in one of Gumball's videos.
- "The Finale": He is among the members of an angry mob attacking the Wattersons, finding his way through their window.
- "The Name": He appears in Gumball's subconscious as he appeared in "The Job."
- "The Extras": His first major role. He appears in a flashback revealing how he met his wife. They later sing "Just Notice Us."
- "The Gripes": He is one of the people seen donating to Gumball and Darwin.
- "The Law": He appears walking on the sidewalk.
- "The Shell": He appears in the theater audience watching the play.
- "The Butterfly": He is one of the citizens knocked over apart from Elmore Mall.
- "The Oracle": He is one of the citizens who want to be the 1,000,000th costumer in Elmore Mall.
- "The Spoiler": He appears in the cinema.
- "The Others": He can be seen in the crowd of citizens on the highway.
- "The Parking": He is examined by Anais.
- "The Romantic": He drives by Rocky's school bus at an intersection.
- "The Wicked": He attacks the Pentagon Father at the hospital.
- "The Traitor": He is at the cinema.
- "The Origins: Part Two": He walks when Darwin goes back to Elmore.
- "The Awkwardness": He is seen in the bus.
- "The Nest": He tries to take pictures of Evil Turtle, despite the Doughnut Sheriff's warnings.
- "The Blame": He is at the PTA meeting.
- "The Scam": He cheers for Gumball, Darwin, and Carrie.
- "The Disaster": He is at the mall.
- "The Rerun": He can be seen at the mall.
- "The Guy": He is weirded out by Darwin.
- "The Choices": He cheers for Nicole.
- "The Code": He is seen on the bus.
- "The Diet": He is in the crowd watching Richard.
- "The Petals": He is seen behind the police car.
- "The Nuisance": He is seen in the crowd trying to kick out the Wattersons.
- "The Line": He is in the line for Stellar Odyssey.
- "The List": He is seen cheering for Gumball and Darwin during a running contest. He is later seen in the audience watching the play.
- "The Cage": He is seen in the crowd cheering for Corneille.
- "The Anybody": He is seen at Elmore Cinema.
- "The Faith": He is in his car during the traffic jam.
- ”The Schooling”: He is in the cinema.
- ”The Intelligence: He dunks Mrs. Robinson.
- ”The Understanding”: His second major role. It is revealed he is a bank robber.
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Gumball: [Gumball rings the doorbell, Quattro opens the door] What?
|—Quattro in "The Job"|
Richard: Well, I think we've pretty much ticked off the whole town.
|—Quattro in "The Finale"|
- His name was revealed on Ben Bocquelet's Twitter.
- The name is based after pizza quattro stagioni, a classic variety of pizza featuring four "seasons."