The Ex

"The Ex" is the twenty-fifth episode of Season 5 of The Amazing World of Gumball. It is the 181st episode overall.

Synopsis
When Gumball learns that his nemesis, Rob, has found a new nemesis, Gumball tries to sabotage Rob's new "enemy-ship."

Plot
This episode begins in Dinner in Elmore Mall where Gumball and Penny are having a date where they are eating ice cream. Gumball then assumes that he cannot get brain freeze and gets one anyway and Penny having to unfreeze him in the bathroom. When Penny and Gumball walked out of the bathroom, Gumball sees Rob and got nervous and asked if Penny knows about him. He sees Rob enters the Hardware store and get coffee.

Gumball then gets a threatening message from Rob which says that he hates him and will squash him out of his yellow skin and hates his slimy bananary guts, which made Gumball confused since none of those relates to him, the message then say that Banana Joe is his new nemesis. Gumball then tried to think it was a mistake and asked Rob about it, but Rob awkwardly states that the message wasn't for him and stated that Banana Joe is his new nemesis, which hurt Gumball's feelings.

At Gumball's house, Penny tries to console Gumball about Rob's new nemesis relationship, but Gumball refuses to accept the reality. As they spoke, the doorbell was rung and Gumball assumed that it was Rob. Penny refuses to let Gumball meet Rob but Gumball manages to escape. It turns out that Rob wanted to return Gumball's stuff to him, hurting Gumball even further.

The scene cuts to Rob spying on Banana Joe, ready to destroy Banana Joe with a trap: Bricks held by a platform held up by a rope that. But before he could deploy the trap, Gumball appears and distracts him, prompting Rob to cut the brakes on his bicycle. Rob ignores Gumball and cuts the rope holding the trap with his scissors, but only to find no scissors. He realizes that Gumball has somehow took his scissors. The trap fails, but instead of yelling at Gumball, he leaves, disappointing Gumball.

Next, Rob goes to Joyful Burger and orders a burger and have Larry serve it to Banana Joe, telling him that it was from a secret admirer. Rob waits for Banana Joe to eat the burger, but Banana Joe decided to remove the ingredients that he did not like, much to Rob's chagrin. As Rob waited, Gumball appears dressed in a banana suit. He assumes that Rob hated Banana Joe because he was annoying and tried to annoy Rob by mimicking Banana Joe's voice and even sipping on a straw noisily.

Rob completely ignores Gumball as he watches Banana Joe. Gumball then went "full Banana Joe" by doing the Banana Dance, catching Banana Joe's attention and he gives Gumball a letter, leaving without touching the burger at all. Rob gets mad and Gumball was excited, but Rob was mad at Banana Joe and not at Gumball. He leaves, and Gumball eats the burger to cheer him up. Just as Gumball stated that there was nothing wrong with the burger, it explodes.

In Gumball's house, Gumball complained about how many cool people had nemesis. Darwin mentions that he had one, and Penny asks who. It turns out that Darwin's nemesis was a hat. Gumball decides that he should just accept it and time over a new leaf and become friends. He tells Penny his idea, but it turns out that Penny had already suggested it to Gumball and he just didn't listen, much to her annoyance.

At Banana Joe's house, Rob was spying on Banana Joe with a binoculars. Gumball pops up in front of him and startles Rob. Rob asks Gumball why he was here, and Gumball states that he only wanted to help. Rob decided to let Gumball be and continued to watch Banana Joe. Gumball then tells Rob that he had booby-trapped Banana Joe's house, much to Rob's excitement.

He waits for it to go off, and Gumball asks why they were watching Banana Joe's house. Confused, Rob states that it was where Banana Joe lives. Gumball wonders whose house he had booby-trapped, and it turned out to be Tobias's house when Tobias flew past after a bomb exploded. Rob then reveals that he had already set a trap for Banana Joe: He had rigged Banana Joe's front door handle beforehand, so when Banana Joe opens the door to take out the trash, it will unhook the latch of a truck at the back of the street and send oil barrels rolling down to obliterate Banana Joe. Gumball comments on how Rob explained it in a lot of unnecessary detail.

Rob and Gumball watched as Banana Joe opened the door to take out the trash as planned and triggers the trap. But just as Banana Joe was about to step on the sidewalk, Gumball takes out his phone to snap a picture, but accidentally turns on the torch and makes Banana Joe freeze in his place, letting the oil drums pass by Banana Joe completely.

Rob gets angry and he tries to shut off Gumball's phone, but quickly hides when Banana Joe approaches. Banana Joe asks what Gumball was doing behind a bush, and Gumball says that he was just chilling out with Rob. Rob emerges from the bushes, angry. He finally snaps and screams at Gumball in anger, claiming that he hates Gumball, much to Gumball's delight.

At school, Gumball tells Darwin that he just needed to keep the hate interesting. Darwin says that it was a huge commitment and Gumball agrees and said he had also smoothed things over with Penny. He says that he couldn't find any cards that was appropriate for his situation. When Darwin asks what he did, it turns out that he had locked Alan in her locker and wrote "Sorry" on Alan and on all of her books, stating that he could not find any balloons either.

Seeing that Darwin has the hat on he congratulates Darwin on having smooth things over as well. A confused Darwin asked Gumball what he meant by that, and Gumball points it out. The episode ends with Darwin screaming and running away.

Main Characters

 * Gumball
 * Rob
 * Penny

Supporting Characters

 * Darwin
 * Banana Joe

Minor Characters

 * Cowboy
 * Felicity
 * Patrick
 * Mrs. Fitzgerald
 * Penny's Sister
 * Brown Oval
 * Exercise Bacon
 * Albert
 * House
 * Yellow Guy
 * Larry
 * Tobias
 * Banana Barbara (voice)
 * Alan
 * Carmen
 * Masami
 * Leslie

Trivia

 * This episode and "The Gi" are tied for shortest episode title so far, with only 5 letters.
 * It is unknown if Rob really did reestablish his hate for Gumball or if he did it simply out of anger.

Continuity

 * Music from "The Nemesis" is reused.
 * In the montage of Gumball talking to Penny about Rob, he specifically refers to events in "The Nemesis" and "The Bus."
 * Rob recalls the events of "The Rerun."
 * While taking out the trash, Banana Joe whistles the same tune from "The Banana."
 * A Laserheart comic book from "The Comic" appears in Gumball's locker.
 * This episode marks Penny's eleventh major role. The other 10 were "The Pressure," "The Party," "The Date," "The Knights," "The Flower," "The Dream," "The Shell," "The Bros," "The Romantic" and "The Misunderstandings."
 * This episode is also Rob's sixth major role. The other five were "The Nobody," "The Nemesis," "The Bus," "The Disaster" and "The Rerun."
 * It also marks Banana Joe's fourth major role. The other three were "The Banana," "The Promise," and "The Mothers."
 * Gumball references Banana Joe's Banana Dance.
 * This is the third time Gumball goes on a date with Penny. The first two were in "The Burden" and "The Misunderstandings."
 * This is the twentieth time that Gumball's underpants are revealed.
 * This is the seventh time Darwin is seen wearing pants.

Cultural References

 * The song at the end when Rob was lashing out at Gumball is a reference to Whitney Houston's "I Will Always Love You."
 * When Gumball is talking about the "creepy ginger dude" who followed the "wizard boy" and never helped, he refers to Ron Weasely and Harry Potter respectively from the titular literature Harry Potter.
 * Gumball uses the phrase "Ay caramba!," Bart Simpson's famous catchphrase from The Simpsons.
 * Gumball also says "Watcha doin'?," which is Isabella's famous catchphrase from Phineas and Ferb.

Goofs/Errors

 * The bike that Gumball wants Rob to cut the brakes on does not have brakes.
 * Though only 4 oil barrels fall out of the truck, 5 are seen rolling by Banana Joe.