When Chip and Dale are scanned by the bootlegging machine, a computer monitor shows what they'd look like in different animation styles; one of their potential redesigns has them looking like Rick and Morty.
An attendee at FanCon is cosplaying as Pickle Rick.
In the trailer for Back to the Future, Doc and Marty are referred to as "Rick and Morty".
In the trailer for Mulan, the Narrator says that you have the film to thank for Rick and Morty's worst fans, referring to the Szechuan sauce (from a McDonald's tie-in) that Rick is obsessed with.
Narrator as Morty: Oh, jeez, Rick! It's like they're torn between two cultures and trying to forge their own identity!
Narrator as Rick: Oh, look out, Morty! (burp) Hot-dog fingers!
Real-Time Fandub: While Eggman is doing some exposition to Team Sonic and Team Jet, he says his IQ had risen due to watching Rick And Morty. Which also had the side effect of making his Tire Robots spout quotes from the show.
RemyRaccoon: In "Everything Wrong With Ratchet and Clank (The Movie)", upon revealing Dr. Nefarious's organic design, Vale quips "I turned myself into a pickle, Ratchet! I'm Pickle Nefarious!" and notes they finally did a joke cringier than "I don't like change".
American Dad!: In "Henderson", when Klaus gets Jeff to make him a glass filigree for his fishbowl to bring to his date with Danuta, his second request involves decorating it with two Pickle Ricks.
Bob's Burgers: One scene in "Brunchsquatch" is animated in the show's style.
The Couch Gag for "Mathlete's Feat" has Rick and Morty crashing into the Simpsons' house and destroying them, leading Rick to send Morty on a mission to create clones of them.
In "Krusty the Clown", the head of a TV review site reveals to Homer that all television is fake and shows him thousands of screens showing the names of nonexistent shows, including Rick and Morty.
In "Treehouse of Horror XXXIII", one of the theme parks at the end of the "SimpsonsWorld" segment is Rick and Morty Universe. The dome is in the shape of Rick's head.