The story of Rob from The Amazing World of Gumball.
Biography[]
Season 1[]

Rob partying with Tobias.
Rob first made a cameo appearance in "The Party," where he attended a party hosted by Tobias Wilson's older sister, Rachel Wilson, and he's shown partying with the former. He was later seen in "The Fight" as one of the Elmore students anticipating the fight between Gumball Watterson and Tina Rex, and he raises his hand to affirm that he'd been bullied by Tina in the past.
Season 2[]

Rob's first speaking role was in "The Pony," in which he greeted Gumball and Darwin Watterson with excitement on the sidewalk, but got upset when the two didn't know his name. He blocked Gumball and Darwin’s path to argue with them about it before Darwin kicked him down a manhole; he later denied them the DVD they were after. In "The Finale," Rob is seen among a crowd of angry Elmore civilians trying to attack the Wattersons before reality is reset to the status quo.
Season 3[]
“ | I was one of the world's mistakes. (…) But you only cared about Molly. You saved her and left me there to rot. But I clung to life! And I came back… (…) but at a cost. You left me disfigured, a nobody! But now you've given me a part to play in the world. I will be your worst nightmare. I will destroy everything you care about! I will take away everyone you love, I will be… your nemesis. | „ |
~ Rob during his flashback. |

Mysterious intruder found in the Wattersons' basement.
In "The Void," Rob briefly appears next to a rejected design of the Watterson house in the titular dimension, indicating his fate as one of Elmore's mistakes sent to the Void.
In "The Nobody," many of the Wattersons' possessions suddenly go missing. The three members of the family wrongfully blame Gumball and Darwin for it, and Nicole Watterson grounds them by making them stay in their room until one of them owns up. The duo assumes that a mysterious house guest must be the culprit, and eventually uncover clues like a secret food compartment that reveal he's been there for multiple months, later attempting to find a secret bunker. This leads them to the basement, where they find all of the stolen possessions, and the intruder in question. The stranger runs out of the house in a panic, and the duo chases him throughout Elmore for an explanation. Gumball blocks his path by creating hazards in his path. This prompts the individual to surrender.

Gumball and Darwin sit the stranger down, asking for an explanation as to why he was in their house. He tells them he is a "nobody" who has lost his identity, has no mother or siblings, and that there is no other place for him in this world. Gumball and Darwin tell the stranger that he can reinvent himself, suggesting different roles for him to play in Elmore, but discovering that all the positive ones are taken. Eventually, they land on the missing role of a "bad guy" and suggest he become their mortal enemy, specifically arguing that he becomes "the worst guy the world has ever made." This choice of words triggers the person's memory, and he is revealed to be Rob.
In a flashback, Rob explains that he was trying to get Gumball and Darwin's attention in the Void, but they were too focused on finding Molly Collins. As the group escaped the Void in Mr. Small's van, Janice, Rob clung on to the back of it as it launched back to Elmore. After the group drove off, Rob was ejected from the Void, but his precarious escape left him glitchy and disfigured. In the present, he vows revenge on Gumball and Darwin for leaving him behind, claiming that he will take away everything that they ever loved and that they have given him a part to play in the world.
Season 4[]

Dr. Wrecker destroying the fabled "Elmore dam."
Rob's next appearance in "The Nemesis" showcases him repeatedly failing (around 563 times, according to a statement made by him) to exact revenge on Gumball and Darwin, attempting to do so by setting up traps around Elmore. As a result, he briefly gives up on the idea of becoming a villain and suggests that they forget about him. Pitying Rob, the duo follow and annoy him around town looking to build his confidence. Rob is initially reluctant and frustrated with their antics, trying to do mundane tasks in peace like riding the bus and grocery shopping, but he eventually comes around after finding the nickname "Dr. Wrecker" invigorating. They help him become a better nemesis by altering his voice into a deep, British accent and making him a villainous outfit, fulfilling the identity. Rob also coins an appropriate new catchphrase: "You just got wrecked." Despite the help from the Watterson brothers, Rob doubles down and insists that they are not his friends.
Later in the episode, Rob's plot to flood the town by destroying the "Elmore dam" with a wrecking ball backfires when he is unable to escape via bus, so he consults Gumball and Darwin to fix the damage. After all hope seems lost, they realize Elmore doesn't even have a dam, and that Rob only destroyed part of a vending machine. Rob's upset and feels worthless again, but to cheer him up, Gumball and Darwin walk into one of his earlier traps. Rob then walks off in confident, evil laughter as the two beg him to help them down.
Later on, Rob makes two cameo appearances in "The Uploads" and "The Love," the first showing him swearing revenge in an Elmore Stream-It video, and the second showing him participate in the "What Is Love" song.

Rob preparing to strike Gumball with a suitcase.
Rob's next appearance is in "The Bus," where he is revealed to be the criminal mastermind behind the episode's convoluted ordeal. He anonymously suggested that the adults plan a lesson, teaching the kids the dangers of skipping school by faking a hostage scenario on the bus. However, unbeknownst to them, Rob told the police it was a real crime and replaced the ordinary suitcase on the bus with one containing a bomb. His reason for doing this was to steal ransom money from the police, blow up everyone present and fulfill his role as Gumball's nemesis.
A chaotic scenario ensues involving a reckless police chase on the highway and into an airport, where a plane wing eventually bisects the bus and picks up Gumball and Rob, who were previously fighting within the vehicle. The two continue to fight on the plane wing over the two briefcases which are also used as weapons, one containing the money and the other containing the bomb. Rob is about to crush Gumball with his briefcase, but as the police arrive, he blames Gumball for the crime and gets away. However, Rob mistakenly takes the briefcase with the bomb, which then explodes from a distance, sending him flying back to the airport and landing on top of a police car. Rob, defeated, is then arrested for his crimes.

Rob in control of the universe.
Rob returns in "The Disaster," presumably having escaped from prison, and steals the Universal Remote from "The Awesome Store" van. He messes around with the remote, discovering its power to manipulate time, reality, and the episode itself. He accidentally rewinds to when he was left behind in the Void, prompting him to reset his voice and declare himself in control in spite of past events. When the Van Shopkeeper requests the money he is owed from Rob, Rob deletes him from existence using the remote. While the Watterson family is looking for a parking spot in the mall garage, Rob pauses the scene and reminds a time-frozen Gumball that he will destroy everything he loves. Rob turns on the ignitions of the surrounding cars, causing them to crash into the Watterson vehicle when time proceeds and create a piled-up wreck. Gumball is wrongly blamed for this due to him previously annoying his mother Nicole by playing with the car window, subtly straining his relationship with his family as they enter the mall.
While at the Elmore Mall, Rob makes Gumball lose his half-brother Darwin by putting up "evil magic subtitles," framing Gumball for making offensive remarks towards Darwin regarding his adoption, upsetting Darwin and causing him to storm off. Gumball tearfully runs to his family to explain what happened, and Nicole calms him down. However, Rob makes Nicole and her husband Richard argue and agree on a divorce by deactivating their "parental filters." Their daughter Anais chases after them, but Rob causes her to get lost by turning down the brightness. The lowered brightness then causes Gumball, who is trying to find her, to dive and accidentally "kiss" Sarah G. Lato in front of his girlfriend Penny Fitzgerald. Gumball chases after a distraught Penny to explain, but Rob's fast forwarding causes Gumball to push her off the mall balcony, time suddenly pausing before she hits the ground. Gumball runs around the mall in confusion, until he is confronted by Rob.

Rob closing the portal to the Void, sealing Gumball inside.
Rob explains the reasons behind his actions, and claims that Gumball has no one to blame but himself. Rob says that he never wanted to be the villain, and instead wanted to be a "cute sidekick" with a "plush toy and a spin-off show," but that since Gumball is the hero of the story, Rob has to be the villain in order to reclaim his place in the world. Rob argues that once Gumball is out of the picture, he can be whoever he wants, as it will no longer be Gumball's "amazing world." Rob opens up a portal to the Void with the remote and tries to kick Gumball inside, but Gumball immediately tackles him, fighting for the remote. They physically battle for a while, and in the process they haphazardly press buttons on the device that cause fourth wall-breaking functions to occur. Ultimately, Rob launches Gumball to the very edge of the portal and tries to eject Gumball, but the remote malfunctions. Initially frustrated, Rob then decides to toss the remote in the Void, forcing Gumball to follow the device in order to save his loved ones. Rob seals the portal to the Void as Gumball falls, saying, "Goodbye…", and the end credits sequence rolls along the "screen" of the Void. Gumball plummets into the Void, and eventually grabs the remote. He fixes the batteries that slipped out and presses rewind, sending him right back to the beginning of the episode. The episode ends on a "to be continued…" message.
Season 5[]

Gumball ejecting Rob into the Void.
Rob appeared again in "The Rerun," where Gumball relives the events of "The Disaster" but with hindsight. When Rob first turns on the insult subtitles to spite and upset Darwin, Gumball rearranges the letters, eventually spelling "Rob is messing with you." Rob then tries to use the eject attack on Darwin, but Gumball pushes him out of the way, inadvertently causing Banana Joe to get hit instead. Rob runs off and again tries to break up Nicole and Richard. Gumball jumps on top of Rob to stop him, but as he struggles for the remote, he accidentally presses the rewind button that starts to temporally devolve Richard and Nicole into babies. Anais points out a time paradox regarding their parents being converted to babies - if their mother and father are now kids, then how could their children ever be born? She argues that the three children need to undo this quickly before they all disappear.
The three siblings chase after Rob, but he evades them. Ultimately, Anais dies from implosion, and Darwin devolves into a normal fish, causing him to suffocate and die on the spot. This enrages Gumball who tries to attack Rob, but Rob fast forwards Gumball into pushing Penny off the mall balcony again. They fight for the remote once more, but Gumball gets the upper hand this time. He ejects Rob into the Void with the remote, defeating his nemesis and maintaining his hold over the device, granting him the ability to fix everything. Gumball celebrates, but quickly realizes the consequences of his actions, believing that he has punished Rob unfairly. He jumps into the Void to try and rescue Rob before he (Gumball) disappears, as the time paradox remains unresolved.

Rob running from Gumball in the Void.
Gumball extends an olive branch to Rob, but Rob denies his help, arguing that he should remain with the rest of the universe's mistakes, and that his story ends here. Gumball chases him through the Void as Rob runs away. Gumball manages to catch up with him, but the former's body is rendered useless due to the time paradox when his limbs begin to disappear. Rob retrieves the remote and contemplates turning Gumball "off," but he cannot bring himself to do so, deciding to spare Gumball’s life instead. Rob hits rewind, and appreciates how Gumball came all that way to save him. Rob realizes the only way to fix everything is to go back in time, which will undo their reconciliation, but Gumball states he looks forward to being Rob's enemy in the future. Rob then goes back in time, fixing everything, and destroys the remote, claiming it is too dangerous.

Rob and Gumball's failed stakeout at Banana Joe's house.
Rob returns in "The Ex," where he finds himself a new archenemy in Banana Joe . He argues that Banana Joe is "easier to hate" after the emotionally complicated events of "The Rerun," apologizing to Gumball as though the two had a romantic break-up. Gumball is distraught, and while ignoring Penny's suggestion to leave the situation alone, he tries to win back Rob's hatred. He does so by suggesting villainous ideas to Rob, being intentionally annoying, and mimicking Banana Joe. Meanwhile, Rob tries to kill Joe by setting up traps, including one that would crush him with a stack of bricks and explode him with a burger-bomb. He also stalks him all day in the process.
After Gumball's attempts prove to be fruitless, he tries to befriend Rob instead. He joins him in a stakeout at Banana Joe's house, where Rob plans to squash Joe with oil drums rolling down a road that trigger when he opens his door. Rob accepts the alliance at first, but Gumball accidentally ruins his trap by inadvertently alerting Banana Joe with his phone. Rob has enough and flies into a rage, lashing out at Gumball for foiling his plans and solidifying Gumball and Rob as nemeses yet again.
Season 6[]
Rob returns in "The Spinoffs," where he holds the sentient Internet hostage within the latter's house in order to hijack the show's broadcast, showing several spin-off ideas with the other characters. His plan is to replace Gumball with a new protagonist as Rob hosts the clips before and after the different segments. This proves to be futile when each idea is more ridiculous than the last, paling in comparison to the original series, so Rob gives up by the end of the episode.

Rob depicted falling into the Void by Banana Barbara's painting.
Rob reappeared in "The Future," where he kidnaps Banana Joe’s mom, Banana Barbara, to understand her prophetic paintings, which have gone from depicting tangible events to pictures of only static. One week later, Banana Joe requests Gumball and Darwin's help in finding his mother after she went missing. Meanwhile, having brought her to an abandoned warehouse, Rob orders Barbara to paint the future, but all she can paint is images of static. This enrages Rob, who claims "that can't just be the end." He grows increasingly frustrated and paranoid because of her incompetence, and begins abusing and threatening her. Barbara eventually paints a portal that teleports Gumball, Darwin, and Banana Joe to the warehouse. This stuns and briefly offers hope in Rob, as it reveals that Barbara can actually change the future instead of merely predicting it. However, she insists that "only what's left" can be altered, meaning the alleged end is inevitable.
The aforementioned trio confront Rob, who uses Barbara’s paintings to defend his quarter, painting in hazardous things like a crack in the floor and himself a bazooka to try and attack them. After a battle that initially defeats Darwin and Joe, Gumball manages to tackle Rob before threatening to paint him out of existence when the other two heroes rebound. Rob claims that they "don't get it" and tells Gumball that "this is more important than [him]." Despite this, the trio eventually use white paint on a painting of Rob to erase Rob from existence, killing him. Gumball feels remorse, and requests that Barbara paint Rob back into existence. Barbara does so, giving him a pigtail as per Gumball's request, who wishes to see him in the future. However, Barbara responds that there is no future, contextualized next to the foreboding painting of Rob which depicts him falling into the Void.

Rob disguised as Superintendent Evil.
In the current series finale, "The Inquisition", Rob appears posing as Superintendent Evil to stamp out the "cartoonish conduct" in Elmore Junior High. This involves having the kids act realistically and, eventually, transforming them into full-fledged humans. He manages to transform almost all the kids into humans and use them as his minions, who become brainwashed and follow his orders - save for Gumball and Darwin, who manage to turn all the kids back to their normal forms by reminding them of their cartoonish habits. After getting confronted, Superintendent Evil's mask is pulled off, revealing him to have been Rob in a disguise the whole time.

Rob falling into the Void as the world begins to crumble.
Rob tries to explain his actions, and claims that the transformation was designed to save their lives, but Tina knocks him out before he can fully explain. Rob wakes up at the school at midnight, alone, and rants about how he was stopped earlier. He claims that transformation was the only chance they had to escape to "the other place" (likely reality) before something happened to their world. However, he cuts himself off upon hearing rumbling sounds, and the floor breaks apart beneath him to reveal the Void, suggesting it was the threat Rob was referring to. He falls in and barely holds onto the edge of the floor, looking down at the abyss before remarking with horror that "it started." He loses his grip and falls into the abyss, screaming, the Void continuing to destroy the world around him. The episode freeze frames on Rob's descent into the Void, and plays an eerie rendition of the end credits music before the episode ends. The last shot of the scene is the same image depicted in Banana Barbara's painting from the end of "The Future."
“ | Ugh! Why did they stop me?! Transformation is the only chance they have of escaping to the other place when this world- [Suddenly, the ground begins to shake. Rob looks around nervously before losing his balance. The floor suddenly opens up beneath him, collapsing into the Void. Rob grasps the edge of the floor and struggles to hold on] Oh no, it started. [Rob loses his grip and falls into the Void] AAAAAAHHHHHH!!! |
„ |
~ Rob's last words and the final words of the show for now. |
As of now, Rob's fate remains unknown until the seventh season of the series is released.
Season 7: The Wonderfully Weird World of Gumball[]
TBA