In the Full House episode, "Joey's Funny Valentine", Joey imitates Ren and calls Danny "Stimpy", and then Becky mimics Joey's Ren imitation.
Key & Peele: In a Wendell sketch, Wendell calls a company to replace a Superman bed he crushed under his own weight. To avoid telling the operator that it's him who needs the bed, he lies that it's for his son and names him "Stimpy" after looking at some Ren & Stimpy plush dolls next to him.
Martin had an episode where Pam insulted Cole and Martin by calling them "Ren and Stumpy".
Saved by the Bell: The College Years had an episode where Mike was training to get back in shape to try out for a spot on a football team. One of the motivations he had to get his aggression out was his anger at Screech taping over his only tape of his past football accomplishments with Ren & Stimpy.
On Day Four of "The Twelve Days of Shitsmas", The Angry Video Game Nerd reviewed the Ren and Stimpy: Fire Dogs game for the SNES. In his review, he describes the show the game is based on as "Looney Tunes on crack" and doesn't question the show's logic, such as the fire department having a beaver in its equipment and the characters sliding up the fire poles.
In all three of his "Top 11 Fuck Ups" videos, footage from the show is shown in both the opening and during the bumpers for each countdown number (all set to "Weird Al" Yankovic's "Everything You Know is Wrong").
In the 2 Stupid Dogs episode, "Cartoon Canines", Big Dog and Little Dog are shanghaied into a training camp for cartoon characters. During the montage where the two dogs try on different cartoon personas, Little Dog is seen looking like Ren, and Big Dog is seen looking like Stimpy. The Drill Sergeant shoots it down for being "Too Diseased".
American Dad!: At one point in the episode "Roger's Baby", Jeff is seen wearing Ren and Stimpy slippers.
In the Drawn Together episode, "The Lemon AIDS Walk", a cat resembling Stimpy is among the characters playing badminton against the Drawn Together team, with Billy West providing his voice.
In the Garfield and Friends episode, "The Incredibly Stupid Swamp Monster", while Roy Rooster is on the phone looking for a new show to cast a role in, he says, "What about cable? I hear they're considering doing a funny version ofRen & Stimpy.".
Robot Chicken: A sketch from "Gold Dust Gasoline" has a unicorn couple miss Noah's Ark and try to survive the flood on their very own (poorly-made) ark. The unicorns featured in the sketch were modified versions of the Palisades Mr. Horse action figure.
In "Brother From The Same Planet", Bart and Tom watch an episode of the show where Ren eats Stimpy's collection of furballs in stomach acid, having mistaken it for meatball soup. The animation for that scene was provided by the layout artists from The Ren and Stimpy Show itself.
In "The Front", the season premiere for Ren and Stimpy is nominated for an Outstanding Writer Award, with a title card that says, "Clip Not Done Yet" shown. This was done in response toJohn Kricfalusi's numerous derogatory remarks about The Simpsons, as well as how he deliberately delayed production on Ren and Stimpy episodes to avoid censorship.