"Don't call him a puppet! That's an offensive term!"
— Robbie defending Rex against Cat in Pilot.
Rebbie is the "family" pairing of Rex and Robbie (Re/x and Ro/bbie). Even though Rex is a puppet and Robbie should have control over him, it mostly seems like Rex has more control of Robbie by bossing him around and arguing with him a lot. However, they also can get along with each other and show that they are really close friends at times. Rex also likes to give false information to Robbie to have him look foolish and then make fun of him later on. For example on Beggin' on Your Knees, Rex told him that Ryder has his ears pierced, when he knew Robbie wanted to be like him to get girls, though it was not true. In Beck Falls for Tori, Rex tricked Robbie into buying size 4 girl's pants. Robbie seems to live the "cool-guy" life he wants through Rex. Rex is not so fond of Robbie.
According to Rex's profile on TheSlap, he hangs out with Robbie mostly because he feels sorry for him. If someone calls Rex a puppet, Robbie gets angry and defends Rex by telling that person that he is not a puppet and how offensive it is to Rex. However, Robbie seems to carry Rex less as the show progresses.
When Tori and Beck were showing off a poorly looking scared scene, Robbie covers up Rex's eyes, while crying, as if he didn't want him to see.
Rex was able to feel Robbie's hand tense up.
Robbie wanted to have a serious talk with Rex for making 200 people come to Kenan's house, disappointed in Rex for doing so.
Robbie nodded (agreeing) with Rex when he says that André has beautiful skin.
Rex un-followed Robbie on twitter, meaning he followed him before.
Robbie was upset when Sam kept offending Rex.
Robbie defends Rex against Sam when she calls him a puppet, but Rex responds that it's cool.
In Rex's profile video, Rex says that he hangs out with Robbie because he feels sorry for him.
Robbie posts pictures of Rex's poses. He also said that Rex charged Robbie $100 to be his male model.
When Rex commented asking $5 for lunch, Jade says that Rex doesn't eat, and Robbie says to Jade that it was offensive.
Rex commented that Robbie slammed Rex's thumb in his locker, making him have a hard time typing.
Rex comments to Robbie why Robbie can't play football.
Rex asks people if he should go out with a hot girl or stay home and watch Robbie cry.
In the game "Beck and Jade's RV Racer," Beck and Jade have to race Robbie and Rex.
When Rex got some indigestion from a gas station hot dog, Robbie told him to quit eating those, but Rex said that they're too good.
In Rex's profile video, Rex thought Robbie was mad at him and seemed depressed about it. Robbie says to Rex that he wasn't mad.
In a photo of Robbie holding his PearPad, the caption says that Rex used it like a boogie board in the ocean.
Robbie said that at the gym someone called him "Mr. Muscles," and Robbie thought it was sarcastic. Rex said that he thought that person was serious and thinks the person mentioned Robbie's tan, in which Rex claims to be "Awesome."
Robbie thought about him and Rex buying a bunk bed, but neither of them were very sure about who gets the top bunk.
Robbie wanted to ask Cat to the prom, and Rex thinks it's going to be ugly.
When André says that his lips need a vacation, Rex says that Robbie's lips need a job.
Robbie said that Rex thinks professional wrestling is legit and thinks that people can't figure out what's real or fake, with his mood being amused, which is very Rex-like. Also, when Jade said that Rex was just Robbie's "imaginary friend," Rex laughs at Jade's comment, then realizing the imaginary friend part, which is very Robbie-like.
Rex feels angry because he and Robbie are on a double-date, being annoyed because Robbie's talking about male makeup, so Robbie and Rex are on a double-date. Interestingly enough, Rex said that he hated double-dates, yet he still goes with Robbie.
Rex likes Robbie best if he's dishing the dirt and actually seeming cool. Rex thought that Robbie was cool.
Rex said that he's a very shy guy, and Robbie is mainly shy as well, so both of them are shy.
In every photo of Rex's gallery "Rex Dies" that Robbie appears in, Robbie is crying, because he's torn up from seeing Rex all wounded.
Robbie said that Rex took a picture of him in the bathroom.
In Robbie's profile video, when Robbie shows off his dance moves, he picks up Rex in 1 scene, and Rex says "Put me down!".
Rex wouldn't let Robbie blow off fireworks, because if Robbie's hand came off Rex would be in trouble. Also, he probably cares about Robbie's safety.
When Robbie says he needs more fans for his page, Rex tells him that nobody likes him, and then becomes upset because Robbie has more fans than Rex.
Robbie thinks it wrong for Rex to pretend it's his birthday just for a free sundae at the Olive Grove.
Rex was able to tell that Robbie's hat, sunglasses, and jeans were all women's.
Robbie felt that he and Rex share a brain.
André says that Robbie doesn't let many people hold Rex.
Festus says that the happiest thing about Robbie being in jail is that Rex wasn't there to make fun of him for being able to fit into a women's jumpsuit.
Rex said that a person in front of him at the movies told him to shut up, and then he dumped his soda on Robbie's head, and then Rex says "oops." Robbie then tells Rex that he is taking away Rex's texting privileges.
Robbie says that Rex makes fun of him when he is getting dressed in the light.
Rex disables the vowels on Robbie's keyboard.
Rex agrees with Robbie that Tori's puns should stop.
When Robbie was dressed as a slice of pizza, Rex asks if someone ordered a slice o' nerd.
On the iCarly Random Debate with Victorious, Robbie wonders how Rex is talking without him holding him, and Rex wonders how come Robbie hasn't had a date since his Bar Mitzvah.
Rex ate Robbie's leftovers from Maestro's, even though Robbie put a note on the box saying it's for Robbie only.
Rex is celebrating Hanukkah with Robbie.
Episodes with a Rebbie main plot/subplot
Robarazzi: Rex influences Robbie to gossip about people on his blog.
Beck's Big Break: Robbie has nightmares about Rex because of how mean Rex is to Robbie, so he has to learn to stand up to Rex.
Rex Dies: Upon seeing Rex being damaged by the Turblow Jet, Robbie becomes heartbroken and falls into an emotional breakdown, also showing how much Robbie cares about Rex.
Robbie Sells Rex: Robbie sells Rex in this episode, but gets him back at the end of the episode.