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 (except Gumball), and as a reward, Darwin joins the solo in the marching band, but Gumball gets jealous and threatens to crash and burn him. Darwin then tells Gumball to come back when he's going to guilt trip him.
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 music 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, making everyone gasp. Principal Brown realizes that someone has been sabotaging his whistle, and accuses 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 Principal Brown bans him from the marching band nonetheless, 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. He 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 by Principal Brown, booting Gumball out of the locker room. 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 trying to sabotage Darwin. Gumball and Leslie put up a fight, 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 to stage fright he plays scratchy notes on his flute, and the fans boo at him, but Leslie and Gumball watch him happily, ending the episode.
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 while possessing Gumball's body.
Gumball makes the same evil face as in "The Move."
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.
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.
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At the School Gym
[School bell rings, Coach walking down the hallway, with the sound of a timpani with every step, peels a banana and a slide whistle plays with every peel, trumpet plays loudly and scares coach, drops her banana and sad trombone plays, bends over to get it and a baritone plays, Mrs. Simian bumps into Coach and crash cymbals plays.]
Principal Brown: Excellent, Banana Joe. Now everyone has their instruments for the marching band.
Gumball: What about me?
Principal Brown: Ah yes, the triangle.
Gumball: [sighs] The triangle again?! Dude, if this instrument were a dance it would look like this.
[Gumball does a ridiculous and stupid-looking dance.]
Darwin: Oh no! In the hands of an expert, the triangle can be a subtle and very expressive— [sighs, cut off by Gumball hitting the triangle] Come on, why don't you try to be good at something for once?
Gumball: Hm...nah. You see, when you try but fail, people think you're a loser. But if you skip the trying and decide to fail right away, then everyone thinks you got the talent but you're to cool to waste it on them. It's like chickens, no one knows if they can really fly or not. That's what makes 'em cool.
Darwin: So that's your life plan, huh? Be a massive chicken?
Gumball: Yes, and cackle at the eagles when they crash and burn.
Principal Brown: Leslie, you have the solo as usual.
Leslie: Sussie, give me an A.
[Sussie rubs the top of her head and the musical sound A comes out. Leslie matches the pitch and starts to play an action sounding solo, while dancing around the room. Banana Joe cuts him off.]
Banana Joe: Hey, wait! How come I don't get to play a solo?!
Principal Brown: Okay, play a solo.
[Banana Joe steps up, takes a deep breath, and starts repeatedly hitting his crash cymbals making an obnoxious sound.]
Principal Brown: That's why, just concentrate hitting on the right mo-[cut off by a crash by Banana Joe]-ment. [Banana Joe stares intensely. ]
Darwin: Principal Brown, may I audition for the solo?
Gumball: Dude, are you crazy?
Darwin: Life is too short to live like a chicken.
Gumball: Do you even know how to play that thing?
Darwin: Nope! But I'll never know until I try.
[Darwin takes a deep breath and plays a sad solo on his slide whistle. Everyone is impressed.]
Alan: I've got goosebumps on my goosebumps...
Principal Brown: The hairs on the back of my everything are standing on end...
[Sussie cries, her tears filling the entire room with water.]
Principal Brown: Sussie, please stop crying or we're gonna have to call the coast guard. Everyone, let me introduce our new soloist. Well done, Darwin.
[The students comes up to Darwin to congratulate him. Eventually, the water sends them all bursting through the door.]
Gumball: [Shakes hands with Darwin] Well done, man, I'm really proud of you.
Darwin: Are you sure?
Gumball: Of course!
Darwin: 'Cause you're kind of breaking my hand right now.
[Gumball is holding Darwin's arm with both hands, crushing it.]
Gumball: Oh! Sorry dude, it's 'cause I'm so proud!
[Gumball pinches Darwin's cheek and pats his face, slowly escalating to slaps.]
Darwin: Alright, stop! What's the problem?!
Gumball: Nothing! I'm pleased for you. [frowns]
Darwin: Really? 'Cause your face doesn't look pleased.
Gumball: Trust me: on the inside, I'm pleased.
[Darwin opens Gumball's inside, where a fiery monster claws at him.]
Gumball: I HOPE YOU CRASH AND BURN, DARWIN WATTERSON!
Darwin: You're lying; what's the problem?
Gumball: [sighs] I'm sorry, man, it's just... it was fun to be losers together, but it's... kinda depressing to be one just by myself.
[Gumball pretends to cry.]
Darwin: Come back to guilt trip me when you can actually muster a tear.
Gumball: Ugh, whatever. [walks away]
[In the cafeteria, Leslie puts his food tray down on Darwin's table and sits in front of him.]
Leslie: Darwin, I just want to say that in spite of the fact I was discarded like a slice of pickle in a cheeseburger, I thought you played beautifully and I'm glad you are playing the solo at the parade.
Darwin: Thank you! Although I am a little bit nervous, I get very self-conscious in front of crowds.
Leslie: Well, I just imagine 'em without their clothes on.
Darwin: [Chuckles] Does it work?
Leslie: Of course it does, try it!
Darwin: It does work! [Keeps chuckling.]
Mister Small: Sorry, Darwin. [Bends down to pick up the peas he dropped. As he's doing so, Darwin and Leslie look in horror as they imagine him naked with his butt in their faces.] Well done on being the new soloist, by the way. When I was your age I played the bongos. Hours and hours of slapping those skins made me the man I am today. Anyway, see you at the parade! Whoopsie, missed one. Uh.
Darwin: [Takes his eyeballs off] No, I can still see it. I'll just go practice somewhere on my own.
Gumball: Can we just use words?
Darwin: Are you gonna try and guilt trip me again?
Gumball: Would it work?
Gumball: Then all I want is a hug!
Darwin: Alright, I gotta get back to rehearsal. Is this how it's gonna be?
Darwin: Dude, you're gonna make me late!
Gumball: I know.
Darwin: Dude, they're starting, I'm gonna be late for that solo!
Gumball: Yeah, that's right.
Principal Brown: Ok, ok, now that you are all tuned up, let's take it from the top.
Alan: We weren't tuning up. I'm afraid that was it, Principal Brown.
Principal Brown: Are you kidding me...? We only have a few rehearsals left, so if you don't make a significant improvement I'm canceling the parade. Now, how do we get better?
Sussie: Through a training montage!
Principal Brown: Precisely, Sussie. But we don't have time for that, so I'm just gonna tear this calendar pages off while we play. Ah, bang on time for your solo.
Darwin: Give me that!
Principal Brown: Someone has sabotaged Darwin's instrument! Hm, I have no idea why I just did that, it was pretty obvious it was gum, which means it can only be you, Gumball!
Gumball: What? Why?
Principal Brown: Because it's gum. Gum, ball. It adds up.
Gumball: What kind of proof is that?!
Darwin: Because all you've been trying to do is drag me down to your level. You've been jealous from the start, you tried to stop me getting to rehearsal and when you didn't succeed you sabotaged my swanee whistle.
Gumball: Dude, I would never do that. To you.
Principal Brown: That's it, you are banned from the band, you are done raining on our parade. I've been waiting to say that for weeks.
Darwin: Gumball, wait! That's school property.
Principal Brown: And remember, you are playing not for yourself, not for your family, not for your country, but to not embarass me in front of hundreds of people. Take it from the top one last time.
Gumball: Oh, dude! You scared me. Hey, you know I just wanted to say that, well, I know you're nervous about playing in front of all those people, but you've got a real talent, man. Yeah, you're playing in a small school stadium right now, but tomorrow you could totally be playing on subway trains, or outside the mall, people throwing money in your hat. And you know I didn't sabotage your swanee whistle. You believe me, right, dude? Right? Dude? Someone else really is trying to bring down Darwin. First the swanee whistle and now this. But who could it be? It could be anyone. Everyone's a suspect. There's no way of knowing who did this. Alright alright, Banana Joe, I get it! Uh, they're gone! Darwin, listen to me, you mustn't play that solo.
Darwin: No! You listen to me: this isn't about me being good at something, it's about you refusing to make the effort to better yourself. And you know the definition of that kind of person?
Gumball: A loser?
Darwin: No, a— Wait, yeah, a loser. So now just please let me concentrate, and get out of my head!
Gumball: Dude, that's a reflection. I'm right next to you.
Darwin: Just get out of here! Get out!
Principal Brown: And stop raining on our parade, I know I've said it before, but it still works.
Gumball: No, wait!
Principal Brown: And I'll expel you from the school if I see your face again.
Archie: Hey, my costume. Ahh, I'm naked!
Gumball: Darwin, watch out! Banana Joe's gonna stop you from playing your solo! Darwin! Darwin!
Announcer: And here comes Elmore's favorite mascot, Archie the Duck!
Banana Joe: Yeah, right on time! Now back to counting.
Gumball: Well if it's not Joe, then who is it?
Cheese: There's an extra hole in my chest!
Gumball: Leslie? No! What are you doing?
Leslie: The solo was mine, not Darwin's! He stole my spotlight, and flowers need light to grow.
Gumball: Dude, you're a flower boy who plays flute in the school band. You don't want this to get violent.
Leslie: You're talking to someone who has danced since the day he was born.
[Leslie proceeds to beat up Gumball with ease.]
Gumball: What I meant was, violence is never the answer. Dude, you're supposed to be happy for your friend's success! This isn't about Darwin being good at something, it's about you refusing to make the effort to better yourself. You know what the definition of that kind of person is?
Leslie: No, I wouldn't want that to happen.
Gumball: So why don't we just enjoy the success of our friend, even if it means we get left behind?
Leslie: You're right.
Gumball: Quick, he's about to play his solo!
[Gumball and Leslie return above ground to watch Darwin's solo. Darwin, however, gets stage fright and plays terribly. The audience boos Darwin, while Gumball and Leslie happily watch.]