Gumball

Gumball (formerly Zach) Tristopher Watterson is the Titular character of The Amazing World of Gumball. He is the oldest child of Nicole and Richard Watterson. AS of the season 3 episode "The Shell" his is dating Penny Fitzgerald.

Early Concept
Originally, Gumball was to be a blue dog. Not much thought was put into this choice - as it was more of a placeholder than a final design. As the creators developed the character further, they decided to make him a black cat, as it fit the personality they had in mind for him: unlucky, but optimistic (black cats symbolize bad luck). The creators found this trait to be too restricting in terms of possible plots and stories. In addition, a silhouette cat would be "hard to read" on the backgrounds planned for the show. Finally, the decision was to make him blue, a decision that Bocquelet liked because blue isn't a color usually found on cats, and it had a "70's-80's Japanese mascot" sort of feel.

Final Design
In the actual show, Gumball is a light blue cat. On his oversized head, he has six whiskers, but only five are visible most of the time, because his head is mostly shown at an angle. He usually wears grey trousers, coupled with a tan sweater, which has brown cuffs and a brown collar. Like his mother and father, Gumball doesn't wear shoes, and is the only member of the Wattersons without visible eyelashes, although, in some episodes, he is seen with visible eyelashes, like in "The Refund" and "The Boss." The inside of his mouth is pink, his tongue is light pink, and his nose is orange.

In Season 2, his design changes slightly. His head and his whiskers are bigger,his shadows on his pants and tail are lighter, while his eyes and tooth are rounder.

In Season 3, Gumball's eyes are permanently round along with the rest of the Wattersons.

Personality
Gumball is portrayed as a fun-loving, imaginative, rather optimistic, and a very mischievous cat. When his mishaps get himself into a mess, he usually attempts to fix things with somewhat dimwitted ideas, which usually get him into even more trouble than before. No matter how his schemes resolve themselves, Gumball's naïveté stops him from learning his lesson. He usually plans his mishaps with Darwin. Like Darwin, Gumball does not appear to notice deception, which may mean that he is too optimistic to notice most negative things around him.

Gumball has a big ego, and it is where he is most sensitive. Otherwise, he is usually positive on all matters concerning him. Gumball is smart, but that doesn't mean he's wise. At times, he acts really stupid, and goes to great illogical lengths to find something, but he has shown some degree of cleverness in other circumstances. He happens to have a superior vocabulary than that of most of his classmates, using more mature words. Gumball has also displayed extents of observance and operational ingenuity, such as being able to identify small things like the burn markings on Rocky's palms, intellectually arrange escape routes based on his surroundings, and even counter his own mother Nicole's hand-based offenses for a great deal of time, shown in both episodes "The Date" and "The Remote"; in which case, even secretly confiscating her car keys from her pocket in the process. His antics have gotten him in dangerous and often life-threatening situations, usually saved by luck or by someone more sensible at the time. He has shown skill in building, when he made a system of chain reactions to launch a bowling ball onto the moon, as seen in "The Car," though he failed miserably in the last element that held the launching spring up.

He is a decent cook, making a very good sandwich for Darwin as mentioned in "The Secret," and is shown making a (extremely spicy) meal for him in the same episode. He also got a B in home eds for his cooking, and Miss Simian called his cooking divine. However, in "The Responsible," Gumball makes disgusting food for Anais, consisting of a rotten fish between bread slices, and an old shoe. In "The Knights," Gumball made a cake for Mr. Fitzgerald.

Darwin
Darwin is Gumball's adopted brother, and thus shares a genuine sibling connection with him and loves him very much. The two boys have a very big imagination and like to get into mischief. They get along very well, though they do argue at times. However, Gumball can be a bad influence on Darwin. Gumball sometimes turns his nose up at Darwin's ideas and they both go for a more childish or foolish approach. The fail in his life, does hurt Gumball to a high extent, to the point that he hates when Darwin success in something and becomes jealous, as seen in "The Triangle."

Trivia
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 * He can play the ukulele and sing well, as seen in "The Knights." Despite this, he is shown to be failing music class in "The Apology."
 * He apparently had his appendix removed, and he also kissed Sussie, as said by Darwin in "The Skull."
 * Gumball was voiced by Nicky Jones (best known for voicing the title character of Chowder) in the early reelepisode, but Logan Grove started voicing Gumball for the rest of the episodes on Seasons 1/2. He voiced Gumball for the final time in "The Kids." Later, Jacob Hopkins takes his place for the rest of the show.
 * In Project Exonaut, Gumball is available as an exosuit for 1,000 coins.
 * In Cartoon Network: FusionFall, Gumball is available as a Nano.
 * Gumball's sweater was revealed to have been found by his dad in a sewage outlet in "The Date."
 * In "The Promise," it's revealed that the name "Gumball" is just a nickname.
 * Gumball is terrible at catching things, as shown in "The Quest."
 * Gumball hates watching the shopping channel, as shown in "The Laziest."
 * Gumball has been shown to be a horrible liar on numerous occasions.
 * Although Gumball has six whiskers, only five of them are visible because of the angle of his head. In "The Poltergeist," when Gumball impersonates a pea on a fork in the attic, you can see that he has six whiskers.
 * In "The Pressure," when Gumball squishes between Masami and Darwin at the girls lunch table, his six whiskers can be seen.
 * In "The Bros," when Penny says she needs space, Gumball is shocked and all his whiskers pop out, similar to Richard's whiskers.
 * He has very wide hips, which is unusual because this feature is more commonly seen on female characters in animation.
 * In Season 1, he has a slightly wobbly outline in certain scenes.
 * Both Gumball and Anais placed 4th in the Dumb Race, since they both forfeited at the same time.
 * In "The Club," Nicole reveals that she and Richard agreed to give Gumball the middle name "Christopher," but Richard confused it for "Tristopher" on Gumball's birth certificate. His middle name was also confirmed as "Tristopher" on James Lamont's Formspring.
 * Gumball has arachnophobia, which is a strong fear of spiders, as shown in "The Date."
 * Gumball may have a fear of drowning, or perhaps, claustrophobia, as reflected in a dream where he hyperventilates and panics in a sinking car in "The Dream."
 * Gumball's face is shown to be extremely stretchy, as in "The Photo;" Darwin was able to mold it into various poses, and it has been shown to go very floppy on occasions.
 * In "The Fight," it's revealed that Tina actually thought of herself as Gumball's friend.
 * Gumball is the only member of the Watterson family that does not have any visible eyelashes.
 * In "The Treasure," it is revealed that Gumball was a really ugly baby, though this may have been contradicted in "The Hero."
 * Gumball is shown to be good at whistling, demonstrating his skill in "The Colossus" and "The Fridge."
 * The first time we heard Jacob Hopkins voicing Gumball was on the "Welcome to Elmore" promo.
 * In "The Name," his real name is revealed to be Zach. At the end of the episode, he legally changes his name to Gumball, which was previously his nickname.