New Elmore Junior High student Sarah becomes Gumball and Darwin's obsessive number-one fan.

The new coach at Elmore High stands up to Jamie. The new Coach witnesses Jamie bullying the other kids at lunch and steps in. Jamie is made to apologize, much to the amazement of the other kids. Gumball and Darwin worry about Jamie seeking revenge, especially when they see her sneaking into the back of Coach's car.

When Miss Simian sees Gumball and Darwin joyful on Monday, she knows that something is wrong with them. She performs tests on them, but the nurse disapproves what she's doing. But suddenly, Gumball and Darwin start to infect the school with the 'Joy Virus', and it's up to Miss Simian and her tape player to cure the students.

Gumball and Darwin are left in charge of the class pet hamster, Chris Morris, but they end up leaving it at school over the weekend.

Darwin becomes jealous of Gumball and Penny's new relationship and sets out to find information that will break them up.

Noticing that everyone is in the doldrums of January, Gumball and Anais invent a new holiday to spark excitement.

When a Butterfly emerges from its chrysalis Gumball and Darwin want to release it. Miss Simian warns them about the butterfly effect. Gumball releases it anyways, and a domino effect causes chaos throughout the city.

After failing at making Alan lose his temper, Gumball and Darwin decide to adopt Alan's positive attitude.

Gumball and Darwin help Anais make up an imaginary friend who turns out to be all too real.

Gumball is convinced there is a Secret Society in school, and he wants in.

When Gumball and Darwin have to wait to see a movie, they must go an entire week without someone spoiling the plot.

Miss Simian threatens to expel the boys if they are late for school, so they race a clock in order to arrive on time.

Gumball and Darwin investigate the disappearance of the family's stuff only to find out some stranger is living in the house with them.

When Gumball's family tries to cheer him out of an inexplicable lousy mood, he wishes they would all disappear.

Nicole wants to show to Felicity that the Wattersons are a normal family, while her son, Billy, meets Anais.

The Wattersons become poor when Richard loses all their money.

Gumball and Darwin discover that Rob, who once swore to wreak vengeance on them, has been trying to destroy them for some time… but his traps never work.

When Gumball and Darwin decide to join a crew, they are determined to prove their worth to senior citizens.

Gumball, Darwin and Anais are delighted when Grandpa Louie gives them a check for $5000, but the family soon fights over how to spend it.

When they find Anais training herself for a brutal showdown, Gumball and Darwin realise that their sister is being pestered at school by an annoying kid: Billy. They try to teach her how to resolve the problem peacefully, but Billy has other ideas.

Gumball and Darwin search for adventure during a walk around Elmore.

After finding a secret manifesto on Alan's memory stick, Gumball and Darwin decide to foil his plan for world domination.

The family goes without wi-fi after Mr. Robinson changes the passcode, so Gumball tries to recover it.

When he is labeled a "loser" in an online test, Gumball believes he must do the opposite of everything he would normally do. Meanwhile, Darwin and Sarah notice Tobias is stealing Gumball's life and role in the series in the form of a cheesy sitcom.

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 family goes to visit Richard's dad. Based on his basic living standards and extended absence from Richard's life, they assume Frankie must have done a stretch in the slammer.

Sick of Granny Jojo's ugly gifts, Nicole encourages the kids to take matters into their own hands and "accidentally" break her latest hideous vase. But when Gumball, Darwin, and Anais try to destroy it, they discover it is more robust than it seems.

When Gumball and Darwin realize Grandpa Louie has no friends, they create one called Muriel, when Granny Jojo finds out Louie has been spending time online with another woman, Muriel not existing is not going to stop her from being destroyed.

Gumball, Darwin and Anais discover that Mr. Wilson has been picking on Richard for most of his life; ever since he humiliated Richard with a high school prank. The kids try to work their dad through it, but when their efforts fail they realize that getting back at Mr. Wilson is the only way to break the cycle.

Gumball and Darwin find out why Richard's diet wasn't working, and after they help him lose weight, he becomes more obnoxious.

When they see the school bullies making fun of Sussie, Gumball and Darwin decide to try and help her act less weird. They carefully observe her behavior and decide that the only thing they have to change is absolutely everything.

No matter what Gumball does, Carmen thinks she knows better; when Gumball attempts to gain the moral high ground, but fails, his only option left is to bring Carmen down to his level.

The Wattersons compete over who has the worst life.

Richard goes on strike to prove that his work around the house is under appreciated by Nicole.

When Leslie's petals begin falling off, he feels like his good looks are fading, so Gumball and Darwin use everything they know about style and beauty to try and help him.

The Wattersons fear the worst when they are summoned to a Town Hall meeting, but are surprised when they're offered a new house - until they discover it's in a different state.

The Wattersons will do whatever it takes to get into the first screening of the latest Stellar Odyssey sequel.

When the kids find out that Mom's life hasn't panned out as she'd hoped, they start taking on her chores, but they accidentally grab her bucket list instead of her to-do list.

A group of kids get locked in the school after their parents have a charity gala. They appoint Gumball as leader to get them out but it leads to chaos.

When Clayton shapeshifts into Gumball to take his detention, he starts framing others for misdemeanors so Gumball and Darwin must track Clayton down to stop him.

Halloween isn't what it used to be. Can Gumball and Darwin help the ghouls get their scare back?

Richard misses a package and is forced into an escalating feud with the delivery guy.

Have Gumball and Darwin finally run out of things to say to each other?

Gumball and Darwin realize that the adult residents of Elmore are dangerously naive when it comes to being safe online, and in fact are in serious need of the boys' help with even the simplest of tasks.

After staying up all night, the boys baby-sit Penny's little sister and manage to lose her in the blink of an eye.

Mr. Robinson tries and repeatedly fails to win back Gumball and Darwin's friendship.

When Gumball's old BFF Fuzzy turns up on his doorstep, Darwin struggles to accept that there was someone before him and fails to contain his jealousy.

The students of Elmore Junior High find their world turned upside down when the mysterious school superintendent comes to stamp out their cartoonish ways.