The Triangle

"The Triangle" is the thirty-ninth episode of Season 3 of The Amazing World of Gumball. It is the 115th episode overall.

Synopsis
Darwin joins the school marching band, as Darwin discovers a talent he never knew he had, which makes Gumball jealous.

Plot
The episode starts out with the students getting their instruments for the school marching band, and Gumball asks Principal Brown what his instrument is, which is a triangle.

Darwin gets a swanee whistle and plays a beautiful merrily tune, surprising the students and Principal Brown, and as a reward, Darwin joins the solo in the marching band, but Gumball starts to get jealous. Darwin then tells Gumball to come back when he's not jealous.

At the cafeteria, Leslie was impressed with Darwin's new solo. Darwin then starts to hallucinate about naked people. Embarrassed, Darwin tells Leslie that he will play his whistle outside. But Gumball comes back and tries to hold Darwin back while getting to the practice. Principal Brown tells the two that they are right on time. Leslie inserts gum in his whistle. Darwin tried to play his whistle again, but a bubble grows out of his whistle and pops in his face. Principal Brown realizes that someone has been sabotaging his whistle, and blames Gumball for sabotaging the whistle. Darwin then told Gumball he was jealous from the start, and that he sabotaged his Swanee whistle on purpose. Gumball tries to deny this claim, but everyone accuses him of sabotaging everything/putting gum everywhere, and his triangle was relinquished from Darwin, much to his dismay.

Outside the stadium, while the band continues to play, Gumball suddenly realizes that somebody else is jealous, not just him. Gumball thinks it is Banana Joe who is jealous.

In the locker room Gumball attempts to apologize with Darwin, but he points out Gumball's lack of compromise as envy and gets dismissed. Principal Brown throws Gumball out of the locker room, threatening to be mean to him if he sees him again. Suddenly, Gumball notices a duck costume walking into the bathroom and steals the costume, revealing an real actual duck named Archie.

Outside the stadium, the fans are cheering for the marching band. Gumball, disguised as Archie the Duck attempts to warn Darwin for somebody else being jealous of him. It turns out that it was Leslie who's jealous of Darwin and sabotaging everything/putting gum everywhere. Gumball and Leslie put up the fight/argument, but Gumball gives him the same statement Darwin gave him earlier. They soon realize their mistakes and decide to watch Darwin play his solo. Darwin tries to play beautifully, but due stage fright he plays scratchy notes on his flute, and the audience boos at him, but Leslie and Gumball cheer.

Main Characters

 * Gumball
 * Darwin
 * Leslie

Supporting Characters

 * Banana Joe
 * Principal Brown

Minor Characters

 * Carmen
 * Teri
 * Sussie
 * Alan
 * Eggheads
 * Mr. Small
 * Tobias
 * Coach
 * Miss Simian
 * Sarah
 * Masami
 * Juke
 * Billy
 * Gary
 * Sphere Citizens
 * Archie the Duck
 * Smelly Cheese

Trivia

 * This episode, along with "The Downer," "The Egg," and "The Money" aired in multiple countries before it did in the US.
 * However, it aired in the UK along with Spain after it aired in the US.
 * The fourth wall has been broken when the screen zooms Banana Joe's face and breaks.

Continuity

 * This is the second time Gumball uses the triangle. The first was in "The Fridge." Gumball references this by saying "The triangle again?"
 * This is Leslie's second major role. His first major role was in "The Flower."
 * Leslie mentions he was "discarded like a slice of pickle on a cheeseburger" due to Darwin's solo, a possible reference to "The Ghost," where Carrie takes the pickle out of her cheeseburger in Gumball's body.

Cultural References

 * The song that Darwin plays for an audition is "Clair de Lune" by Claude Debussy.
 * The school mascot, Archie, somewhat resembles Donald Duck.
 * It also somewhat resembles Dolan, an internet meme.
 * Gumball and Darwin "communicating" through whistles may be a reference to the children's show Clangers.
 * In fact, Principle Brown gave Darwin a swanee whistle, which is the whistle used to "voice" the Clangers.

Goofs/Errors

 * In one scene, Carmen appears in the boys' locker room, even though she's a girl.
 * Sussie is part of the marching band, but doesn't appear at the parade.
 * The water in the school hall from Sussie's tears disappears after the close-up shots of Gumball and Darwin.
 * When Mr. Small is picking up Darwin's peas, the bowl becomes full when only a few were put back.