| Character Information
Donald has red, and greyish-brown stripes streaking across his green square body. He also wears plaid pants. The colors on his limbs differ from the colors of his body. He has a remarkable white mustache, and uses a cane like Marvin. He also wears a striped hat, and a black belt. He has a Scottish accent.
- "The Debt": He appears at the senior talent show performing with Marvin, Louie, and the Yellow Old Man.
- "The End": He is in the long line of shoppers.
- "The Laziest": His first speaking role. He is with the rest of the Senior Citizens talking to Gumball and Darwin about Lazy Larry.
- "The Kiss": He is with the rest of the senior citizens in Darwin's happy place, and then in Gumball's happy place.
- "The Poltergeist": He can be seen in the cinema in Mr. Robinson's flashback.
- "The Colossus": He is blown away by Hector along with the rest of the Senior Citizens (except Louie).
- "The Job": He is seen on a news report watching Marvin float in the air along with Louie and Betty.
- "The Watch": Darwin asks him if he can borrow his scooter, which he allows after he fails to get up from his chair to fight them.
- "The Tag": He drives his car.
- "The Boombox": He can be seen on Win or Don't Win winning a car.
- "The Finale": He demands that the Wattersons give back his scooter.
- "The Extras": His first major role. He is first seen singing with the minor characters. Later, he is seen dancing with the senior citizens.
- "The Lie": He is seen caroling about Sluzzle Tag along with Marvin, Betty, Felicity, Jackie, and Harold.
- "The Butterfly": He gets knocked over by Betty and then knocks over Marvin. He later appears on the escalator.
- "The Crew": His second major role, he helps Marvin stop Gumaball and Darwin from escaping.
- "The Nest": He is one of the Evil Turtle's victims.
- "The Fury": He is stuck in traffic.
- "The Catfish": He is in Louie's flashback.
- "The Nuisance": He appears in a picture in Marvin’s house.
- "The Anybody": Clayton turns into him to get a ticket and later turns into him to help Gumball.
- "The Faith": He is in his car during the traffic jam.
- "The Founder": He drives his car.
- "The Intelligence": He is in the library.
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- His first name was confirmed in "The Crew." His last name was confirmed in "The Nest."
- Donald speaks with a Scottish accent. This is a reference to the Scottish origins of plaid.