The Senior Citizens are minor characters in The Amazing World of Gumball. They do stereotypical "old-people" stuff, like taking part in senior talent shows, sitting around on lawn chairs, retelling stories of their youths, and saying comments such as: "What did he say?".
- "The Responsible": Gumball and Darwin bump into Marvin while walking Anais at the park. He treats Anais as a pet, prompting her to bite him.
- "The Debt": All of them appear at the talent show (except Betty) - four of them performing, and two of them in the audience.
- "The End": The men appear as background characters standing in line in the supermarket.
- "The Laziest": Four of them are lounging out in a yard, when Gumball and Darwin ask them about Lazy Larry.
- "The Prank": Marvin watches the paramedics take the bucket off Richard's head.
- "The Kiss": Four of them appear lounging out in a yard when the Plaid Old Man asks Gumball to give Granny Jojo "a big kiss from me!"
- "The Goons": Marvin joins the Dumb Race, and accidentally runs over Gumball and Anais with his electric wheelchair.
- "The Colossus": Four of them are sitting on the front porch during Hector's rampage.
- "The Knights": Louie can be seen walking a dog in the beginning of the episode.
- "The Job": Marvin and the others were shown through the television news broadcast, when Marvin was floating mid-air.
- "The Watch": Marvin gets into a fight with Gumball over a watch.
- "The Castle": Louie is one of the uninvited guests at The Wattersons' house.
- "The Boombox": The Plaid Old Man is a contestant on Win or Don't Win.
- "The Plan": Louie is seen walking a dog at Elmore Park.
- "The Finale": They chase after the Wattersons because they have stolen their scooters.
- "The Kids": Louie comments on Gumball's appearance during the "Make The Most of It" montage.
- "The Extras": They appear in the "Just Notice Us" montage, and later, they dance to the tune of a song on a radio.
- "The Mothers": Betty is helped out by Banana Barbara.
- "The Man": Louie is Granny Jojo's new boyfriend.
- "The Lie": All of them (excluding Louie) sing Sluzzle Tag carols at the mall.
- "The Butterfly": They appear in the mall.
- "The Oracle": They are one of the many people who want to be the 1,000,000th costumer.
- "The Spoiler": They appear in the cinema.
- "The Countdown": They all appear on the city bus.
- "The Nobody": Marvin is seen in line for hotdogs.
- As plaid is a pattern native to Scotland, the Plaid Man has a Scottish accent.
- Louie resembles Disney's Mickey Mouse, and Rat from the newspaper comic, Pearls Before Swine.