When Darwin has lunch with Idaho, he decides to stop eating potatoes in solidarity with his brotato, but he finds his obsession with his favorite food harder to kick than he ever imagined, so Gumball decides to help his friend curb his carb cravings.
The episode begins with Darwin sitting down next to Idaho, with his lunch (which is a potato). Darwin slices open the potato and begins to eat it, right in front of Idaho, to the latter's shock. Gumball then joins them and greets Idaho, then calls him a "brotato". Idaho storms off with his lunch, and Darwin ponders why he is upset, and Gumball points out that the reason is because Darwin is eating potatoes. Darwin then decides never to eat potatoes again, deciding to eat other foods he likes and goes to ask for fries. Gumball points out that those are potato as well, and all of Darwin's other favorite foods are made of potatoes. Darwin calls himself insensitive, and then has a flashback of instances where he does things that involve potatoes in front of Idaho (For example, one instance he had made a birthday cake for Idaho out of a potato.) Darwin calls himself insensitive again, and Gumball decides to help the former with his craving.
After confiscating Darwin's potato stash, Gumball inquires if Darwin has anymore hidden. Darwin tries to hide the fact that he has more potatoes hidden, but Gumball finds the secret stashes very quickly. Darwin then has a fit of mood swings due to ditching his craving of potatoes, and Gumball and Darwin then search the internet and decide to do origami. After making numerous origami swans, Gumball asks if Darwin feels better, which Darwin objects. Gumball comments that they at least haven't hurt anyone's feelings. Teri comes in and asks the duo if they have seen her parents as they were coming to pick her up earlier that day, and the duo look at the two large origami swans next to them, and nervously say "no" to Teri's question. Teri then tells them "never mind" and walks off.
Gumball attempts (and fails) to use hypnosis to curb Darwin's craving. Sarah then comes and greets them in a confusing manner (which she briefly has to explain to them). The duo explain that they are trying to curb Darwin's potato craving. Sarah then gets an idea, and then has Darwin watch a quick video of potatoes being cooked into French fries, which in turn has spooky music. However, Darwin just responds by showing Gumball and Sarah the same video, but this time it has happier, farmlike music. Darwin also comments that it might have worked better if they didn't hold his eyes open with French fries, as he throws the fries aside, only for them to go into a fan and get shredded, the fries' crumbs being splattered all over Darwin's face. Darwin asks if they have any more ideas, and Sarah suggests Mr. Small's therapy club (which is revealed to just be duo therapy with him and Sarah) and Gumball complains about this.
Shortly, the subject of Darwin's craving curb is brought up by Gumball, and when asked why he is curbing his potato craving, Darwin says that it makes Idaho upset. Mr. Small suggests that Darwin imagine a potato with a face every time he goes to eat one. Darwin tries it, and it works. Darwin thanks Mr. Small, but then sees a stream of sausages on his desk, as well as steak. Mr. Small reveals that he still eats meat because he cannot stand not eating it, prompting Darwin to eat a potato he finds on the floor. However, Darwin begins to hallucinate potatoes singing a song, telling him to stop eating them. Darwin then comes to and decides to lock himself in his room until he stops eating potatoes, and runs off to do so. Gumball and Sarah try to get Mr. Small's assistance, but he shamefully yells at them not to look at him.
Gumball and Sarah run to Idaho, and Gumball eagerly tells Idaho that Darwin has quit eating potatoes. Idaho tells Gumball that Darwin's potato consumption never upset him, because he is a different kind of potato. Idaho goes off to see Darwin, and Gumball dismisses it as fine at first, until Sarah tries to tell Gumball that Idaho is in serious danger (because he is a potato). Meanwhile, Idaho mistakenly puts on tanning oil instead of sunscreen, making him crispy. Back at school, Sarah desperately tried to explain to Gumball that Idaho is in peril, but Gumball doesn't understand. Idaho, elsewhere, gets salt dumped on him by a worker putting rocksalt on the road despite the absence of ice and snow. Gumball eventually realizes that Idaho is in real danger, and runs off to save him. Much to Sarah's annoyance.
Idaho goes to Gumball and Darwin's house, and goes upstairs. Idaho opens the door to the duo's bedroom, and Darwin is there, starved for potatoes and in a monstrous state. Meanwhile, Gumball and Sarah have reached the house and they open the door with difficulty. They run up the stairs and see bits of potato in the bedroom as well as Darwin eating potato, and Gumball screams "Noo...!" and mourns, thinking that Darwin ate Idaho. Idaho then comes, unscathed, and Gumball is confused. Idaho explains that he brought Darwin a potato dish to tell Darwin that it's okay to eat potatoes. Gumball asks why Idaho was angry at Darwin, but Idaho says that he was mad at Gumball for calling him a "brotato", as he hates the nickname. Sarah makes a joke out of it and they laugh, while Gumball nervously laughs.
Seemingly in his head, Gumball tells himself to laugh with them so they think he understands. Darwin then asks if they are going to pretend he didn't say that out loud. Idaho and Sarah agree with Darwin, while Gumball continues laughing nervously, ending the episode.
[Idaho is sitting in the cafeteria when Darwin sits next to him, cuts open a potato and starts eating it]
Darwin: Mmmm! Fluffy!
Gumball: Hey Idaho, my number one brotato! How's it hangin'?
Idaho: Hmph! [Picks up his food tray and walks away]
Darwin: What's wrong with him?
Gumball: Isn't it obvious?
Gumball: Dude. You're eating potato! In front of Idaho! The potato!
Darwin: [Gasps] That's it! If it upsets Idaho, I'm never gonna eat potato again. There are plenty of other foods I like. I'll just eat those. I'll go ask for some fries.
Gumball: Uh, those are potato, too. What did you think French fries were made of?
Darwin: French people?
Gumball: SMH dude... SMH...
[Just as Darwin opens a bag of chips, Gumball rips the bottom of the bag]
Gumball: Also potatoes.
Darwin: Hash browns?
Darwin: Tater tots?
Darwin: Patatas bravas?
Darwin: Potato salad?
[Gumball raises his eyebrow]
Darwin: [Sighs] I can't believe I've been so insensitive. At least it was only once.
[A flashback shows Darwin reading the back of a bag of chips while sitting next to Idaho in the bus]
Darwin: "Each chip is sliced and diced, and lowered gently into the boiling oil..."
[Another flashback shows students singing as Darwin brings Idaho a potato with a sparkler in it]
Teri, Sarah, Carrie and Tobias: Happy birthday, dear Idaho...
[The potato bursts into flames, and Darwin is seen in the bus again]
Darwin: "...then boiled AGAIN in the boiling oil..."
[In another flashback, in class...]
Idaho: Do you have the time?
Darwin: Sure thing! [Stabs potato clock] A quarter after two.
[Once again, Darwin is shown in the bus]
Darwin: "...before boiling them in boiling oil one final time." [Hands the bag to Idaho] Want one?
[Back to the present, Darwin is face down in his plate]
Darwin: I'm so insensitive!
Gumball: Yeah. Maybe you need to think about how other people feel.
Darwin: Also, I eat way too many potatoes.
Gumball: I'm proud of you, buddy. Openly addmiting you have a problem is the first step to recovery.
Darwin: Okay! [Inhales deeply][Stands on the table] I HAVE A PROBLEM! [Sits down] Great! All better. [Leans back]
Gumball: Dude, that's not the only step to recovery. And that chair doesn't have a back on it.
[Darwin screams as he falls over]
Gumball: And maybe the problem's a lot bigger than you think.
Darwin: [Peels a potato][Screams] I do need help.
[The school bell rings. Gumball and Darwin are in an empty classroom]
Gumball: Okay, dude, we've cleared out your locker and your desk. Is there anywhere else we've missed?
Darwin: Hmm. Is there anywhere else? [Reaches below his desk] I don't recall. Could there be any other potatoes? I think we've got them–
[Gumball grabs the potato taped under Darwin's desk]
Gumball: Thanks for leading me to your secret supply.
Darwin: But you'll never find my secret secr–
[Gumball grabs another potato behind Darwin]
Gumball: Stay strong, bro. I know this isn't easy.
Darwin: [Tearing up] This is a very emotional time for me. [Cheerful] I keep getting these horrible, devastating mood swings! [Crying] But it's fine. Everything is great. [Sobs] All I need to do is... [Screaming] RELAX! Like, really, really relax! I'll fight anything that moves! [Laughs maniacally and runs out of the classroom]
Gumball: Well, he's coping better than I thought.
Ways to cope
[Gumball and Darwin are in the library in front of the computers]
Gumball: You know, a lot of people find doing something with their hands helps take their mind off cravings. Let's search for... [Typing] "Things to do with your hands."
Gumball and Darwin: Whoa!
Gumball: Origami! That's a great idea!
[A bit later, they find themselves surrounded in paper swans]
Gumball: Feel any better?
Darwin: Not at all.
Gumball: Well, at least it hasn't upset anyone.
Teri: Hey, guys, have you seen my parents? They were coming in today to see Miss Simian.
[Gumball and Darwin look behind them and see two larger paper swans]
Gumball and Darwin: No?
Teri: Never mind.
Gumball: Clearly, dedication and good intentions aren't working. Time to put our faith in something that looks like science, but isn't.
[Gumball puts a self-hypnosis CD in Darwin's CD player]
Dr. Zanthor: Welcome to Dr. Zanthor's "Hypnotize Yourself to a Healthier You." Listen to the sound of my voice. You're feeling very sleepy. You're lying in a field. [Yawns] You're feel– [Drowsy gibberish][Snoring]
[Darwin takes off his headphones]
Gumball: [Eating chips] Did it help?
Darwin: No! And neither is that! Get those chips out of my face!
[Darwin throws the chips at a fan, causing them to fly all over his face]
Sarah: Hey, what are you guys doing?
Gumball: [Sighs] Do we really have to tell you, or will you just admit that you've been eavesdropping and already have a solution?
Sarah: I sure do! Just leave it to Scoop Dogg!
Gumball: Oh. Okay. Is he coming here, or do we go to him?
Darwin: So, we just...wait here, or...
Sarah: No, no. It's me. I'm Scoop Dogg. It's a new nickname I'm trying.
Gumball and Darwin: Oh.
Gumball: That was not at all clear.
[A video plays on the computer. It is accompanied by eerie music and shows footage of potatoes being harvested, turned into fries, and being eaten by a child who laughs evilly]
Sarah: Did it work?
Darwin: Not really. Aversion therapy is just advertising with different music.
[Darwin clicks another video, which shows the exact same footage as the previous one but with upbeat music]
Darwin: See? ...Also, it would have worked better if you hadn't wedged my eyes open with French fries.
[Darwin throws the fries in his eyes at another fan, and his face is covered in potatoes again]
Darwin: [Sighs] Any other bright ideas?
Sarah: How about Mr. Small's group therapy? It's really good. I've been to every single one to cure my obsessive personality. Every...single...one. Haven't missed a week. Tried to – couldn't.
[Gumball, Darwin and Sarah sit in Mr. Small's office]
Mister Small: Is everyone here? Good. Welcome to the therapy group.
Gumball: Wait, it's just you guys? You can't be a group of two. That's a duo.
Mister Small: Well, I just thought "duo therapy" sounded weird.
Gumball: It is weird.
Sarah: Oh, oh, oh! I'll start. My name is Sarah, and I'm obsessive about comics, movies, Gumball, fan art, Darwin, Gumball and Darwin, making lists about things I'm obsessed with–
Gumball: Sarah! This isn't about you! It's about me – helping Darwin to give up potatoes.
Mister Small: Nature's taste grenade? Why?!
Darwin: Because it's upsetting Idaho.
Mister Small: Very well. I gave up eating meat using the visualization technique. Each time I wanted to eat some meat, I would picture it with a face. It was harrowing, but it worked. Try it. [Hands Darwin a potato]
Darwin: Whoa! [Gasps] I think it worked! I don't feel like eating potatoes anymore. Thank you, Mr. Small.
[As Darwin and Mr. Small stand up to hug, Darwin notices a string of sausages on Mr. Small's desk]
Darwin: What's that on your desk?
Mister Small: Nothing. Go back to the part where you were saying what a great duo therapist I am.
Darwin: I never said that. Is that a string of sausages? And you've got steaks hidden under here!
[Gumball and Sarah gasp]
Mister Small: Darwin, wait! It's not what it looks like. I've been hiding meat around my desk because I can't stop eating it!
Gumball: That's exactly what it looks like.
Darwin: You're a total fake! That's it! [Takes a potato off the floor]
Gumball and Sarah: No!
Darwin: [Crying] I'm sorry, but this is who I am! [Bites in potato] Huh. I don't feel any different. Do I look okay?
[Darwin looks at Gumball, Mr. Small and Sarah, who all have potatoes for heads]
Mister Small: Potato.
Sarah: Potato, potato.
Gumball, Mister Small and Sarah: POTATO! POTATO!
Potato: Hello, Darwin! Nice to see you! Glad to have you back with us!
But we have things we need to tell if it isn't too much fuss!
We really can't forgive when you cut us into pieces!
We wish you haven't eaten all our nephews and nieces!
Mashed, and baked, and fried, and roasted!
Sautéed, boiled, grilled, and toasted!
Peeled off all our skin! Dug out all our eyes!
Diced into wedges and you sliced us into fries!
We are glad we came to see you! One more thing we must discuss!
The final thing we need to say is...
All Potatoes: PLEASE, WILL YOU STOP EATING US?!?
[Darwin lies on the floor, frothing at the mouth]
Gumball: Uh...you okay, buddy?
Darwin: That's it! I need to do this on my own. I'm gonna lock myself in my room until I beat this thing! [Runs away]
Gumball: Uh, Mr. Small, Darwin just skipped out on the rest of the school d–
Mister Small: [Devouring meat] Don't look at me!
[Gumball and Sarah join Idaho at his locker]
Gumball: Brotato! We did it! We did it! [Closes locker] Darwin's given up eating potatoes!
[Idaho tears up]
Gumball: I knew you'd be pleased, but I didn't realize you'd get so emotional.
Idaho: I'm not. You just shut my hand in the locker.
Gumball: Oh. [Opens locker] Sorry.
Idaho: So, what was that about Darwin?
Gumball: He's gone home and locked himself in his room to quit eating potatoes because it was upsetting you.
Idaho: Why would I be upset? I'm not the same potatoes as you eat in the canteen. Are you saying that all potatoes look the same?
Gumball: [Gasps] Uh... Eh... Uh, uh...
Sarah: [Whispering] Say "no!"
Idaho: [Sighs] I'm gonna go see Darwin.
Gumball: So, it looks like everything worked out well in the end.
Sarah: I don't think you understand what just happened. Darwin is struggling to battle his potato cravings, and you just let Idaho – the potato – go off and see him!
Gumball: So, we're good?
[Sarah shoves her hand into her face]
[Idaho is walking in the streets]
Idaho: Phewie! Sure is hot. I better put some sunscreen on.
[He smears oil over his body]
Idaho: [Sniffs] Well, plow my furrow! This ain't sunscreen! It's tanning oil! Look at me, getting all crispy!
[At school, Sarah plays a slideshow in front of Gumball]
Sarah: [Groans] Okay, one more time! So, Idaho has gone to see Darwin. Remember, Darwin is struggling to resist eating potatoes...
Gumball: [Echoing] If I have a serious expression and nod really slowly, it'll look like I'm listening to every word she's saying.
Sarah: You do realize you said all of that out loud?
Gumball: [Echoing] Quick! Think of a good excuse.
Sarah: And that!
[Idaho is still walking, when a worker in a gritter scatters salt over him]
Idaho: Hey! What do you think you're doing?!
Goblin: I'm salting the roads for ice.
Idaho: But it's, like, 90 degrees out here, and it's June!
Goblin: I'm so fired.
[Back at school, Sarah shows a cardboard model of Gumball's neighborhood]
Sarah: Okay, so, here's a model of the block you live on. I'm sorry I didn't have time to build it to scale. So, here's Darw–
Gumball: Sarah! We don't have time for this! I just realized that Idaho is on his way to see the potato-starved Darwin and Idaho is a potato! [Runs off]
Sarah: Rrrrr!! [Melts]
[A truck with the word "Coleslaw" printed on its side drives at full speed in Elmore. Its driver, Hank, tries braking]
Hank: Oh, no! The truck is out of control!
[Idaho crosses the street as the truck goes faster and faster. Hank panics, but thankfully, he was driving on a road parallel to Idaho's]
Hank: Oh. I guess it's all right.
[Idaho finally made it to the Wattersons'. He knocks on the door]
Idaho: Darwin? Darwin?
[The door creaks as it opens]
[Idaho enters the silent house and starts making his way upstairs. The door slams shut on its own, startling him]
Idaho: Eh. Darwin?
[The door to Gumball and Darwin's room is ajar, and only Darwin's heavy breathing can be heard]
Idaho: Darwin? [Opens door] Darwin?
[Darwin turns around with a ravenous expression on his face. Meanwhile, Gumball arrives with Sarah, but struggles to open the door]
Gumball: Darwin! Darwin! Don't do it! Open up! Open up!
[Sarah clears her throat, then pushes the door open]
Gumball: Oh. Thanks.
[When Gumball and Sarah enter the room, Darwin is at the desk, eating loudly. Bits of potato are scattered all over the floor]
[Gumball runs into the room and hurls himself to his knees]
Gumball: Not now, Idaho! Nooooo! Wait. What?
Darwin: Idaho brought me this baked to show me it's okay to eat potatoes, and there's no hard feelings.
Gumball: Brotato! You're alive!
Gumball: Wait. I thought you were upset at Darwin.
Idaho: No, I was upset at you! I hate that stupid nickname!
Sarah: Oh, we thought you were annoyed about the potato thing, but you were annoyed about the brotato thing!
[They all laugh]
Gumball: [Echoing] Just laugh with them, and they'll think you understand.
Darwin: So, we're all gonna pretend we didn't hear him say that, right?