Gumball (formerly Zach) Tristopher Watterson is the main character and protagonist of the show The Amazing World of Gumball, also in the fanon. He is an irresponsible cat who always gets in trouble. When he is in trouble, he will think-up silly ideas to get them himself out of trouble, but that usually gets him in more trouble. His love life is a tigress named KC. However, he fails to express his love of her, and she considers him more a "little brother". He belongs to a weird family that is composed of him, his brother Darwin, his quadruplet sisters Mabel, Rayona and Purriana Grande. His (step-)dad Richard, his mom Nicole, his younger sister Anais, grandparents and many, many uncle, aunts and cousins. His friends include Cobby and Benzuss.
Gumball is a light blue cat with six total whiskers (but only five are visible). He wears a beige colored sweater with a field drab colored neckline and cuffs, he also wears dark grey pants with cream trimmings. His appearance looks similar to his mom. He is a little chubby around his waist.
In RC's depiction at 13, Gumball has shaggy maroon (chestnut, brown-red) hair. His new attire consist in a light grey sweater and dark blue jeans. He has a birthmark shaped as a eight-pointed star on his right ear.
In Season 4, his attire is almost same. He keeps his Aerium Gem in a belt, and wears grey gloves with a wind sign.
in "Gumball Final Fantasy" he has a black long sleeved shirt, dark blue jeans, black gloves, shaggy Marion hair, wears his Aerium gem as a belt and his weapon Its a razor blade.
Gumball is a trouble-prone cat who is some-what upbeat. As shown in The DVD, he can be very over reactive. He usually gets in trouble because of his crazy shinanigans. He is some-what polite, as shown in The Ghost, because he will do whatever someone asks him to do until he gets fed-up with it. Gumball's antics sometimes keeps him from learning some key lessons of life.
in "Gumball Final Fantasy" hes cocky,tough, but serious, polite and nice 14 teenager. He is the leader in the gang and fights together With the gang and shows he is very protective to the others, Mabel hides a secret that she is secretly jealous of Gumball being chosen as the leader not her because she knows that inside him he can't handle the gang, but Gumball knows already what she meant.
- Gumball is one of the 3 characters who have appeared in every episode.
- He once hid upside down in Remote Fun Time!.
- Gumball is one of the few characters who are actually from the real show, and not OCs.
- As shown in The Quest, Gumball can't catch many things thrown at him.
- Gumball can be somewhat lazy, like Martha and Benzuss.
- As in "The Name" his real name is Zach, and is later changed to Gumball
- His nickname (later "legal" name) is based on the food and candy "Gumball".
- Gumball is the only male between the Watterson Quadruples.
- Gumball is one of the few characters who break the fourth wall.
- Gumball has a nano in FusionFall, a game in Cartoon Network. In the game, his dad, The GI, and the game Splash Master are mentioned.
- Gumball has a very imaginative mind, as shown in "The Words" Where he fights Darwin, making the environment pixelated, like a old video game, the way that happened seems fairly similar to "Street Fighter".
- In the fanon, he and his family are relatives with the Peterssons, because Robin is Nicole's brother.
- When Gumball freaks out, he yells AHHHHHHHHHHH MEOW.
- He hangs out with MANY girls (And the girls are KC and his sisters).
- He also knows how to play an electric guitar, because he was learned by Martha.
- He is the youngest.
- In "Gumball Final Fantasy", Mabel is secretly jealous of him but he already knew it, thus making Mabel more like the leader than Gumball.
- He still talks in his sleep.