Editing Rob (The Amazing World of Gumball) (section)

==== Season 4 ====
Rob's next appearance in "The Nemesis" showcases him repeatedly failing to exact revenge on Gumball and Darwin by setting up lackluster tracks. The duo decides to help him become a better nemesis by following him around town. He becomes increasingly agitated by their antics until Gumball suggests the nickname "Dr. Wrecker," which Rob ends up liking. They alter his voice to sound more villainous, make him armor out of cardboard, and lead to him coin his own catchphrase. Later in the episode, his 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 Dr. Wrecker only destroyed part of a vending machine. To cheer him up, Gumball and Darwin walk into one of Rob's earlier traps. Rob then walks off in 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 briefly swearing revenge in an Elmore Stream-It video, and the second showing him participate in the "What Is Love" song.

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 teach the kids to not skip school by faking a hostage scenario, 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 and fulfill his role as Gumball's nemesis. A chaotic scenario ensues involving a police chase on the highway and into an airport, where a plane wing eventually cuts the bus in half and picks up Gumball and Rob. The two 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 returns in "The Disaster," presumably having escaped from prison, and steals a 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 Gumball that he will destroy everything he loves, unbeknownst to him. Rob turns on the ignitions of the surrounding cars, causing them to crash into the Watterson vehicle and create a piled-up wreck. Gumball is wrongly blamed for this due to him annoying Nicole earlier by playing with the car window, and the family enters 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. Gumball runs to his family to explain what happened, and Nicole calms him down. However, Rob makes Richard and Nicole argue and agree on a divorce by deactivating their "parental filters." Anais chases after them, but Rob causes her to get lost by turning down the brightness. The lowered brightness then causes Gumball to dive and accidentally "kiss" Sarah G. Lato in front of Penny Fitzgerald, Gumball's girlfriend. 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 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, 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. 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 in with a final goodbye, and the end credits sequence roll 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.