The Simpsons is an American animated sit-com created by Matt Groening for the Fox Broadcasting Company. The series is a satirical depiction of a middle class American lifestyle epitomized by the Simpson family, which consists of Homer, Marge, Bart, Lisa, and Maggie. The show is set in the fictional town of Springfield and parodies American culture, society. television, and many aspects of the human condition.
Rick and Morty in The Simpsons
In the couch gag for the episode "Mathlete's Feat", Rick and Morty were seen crashing through the wall of the house, killing The Simpson family. Morty was terrified to see what he had done and Rick blamed it on him. He told him to go to another dimension with their family portrait and clone them to bring them back. Morty went there and while he did, Rick walked around the house, eating their food and drinking Homer's beer. Ned Flanders walked in and saw what he did and so Rick had to use his Freeze ray to freeze him. When Morty came back, they brought The Simpsons back to life, but they came out looking like mutated versions of themselves that resembled Rick because of their skin color and spiky hair. Knowing that there wasn't really anything else they could do, Rick and Morty quickly fled the scene, leaving them behind. After this, Bart decided that he had had enough and said "No more guest animators!"
The Simpsons in Rick and Morty
One of the background characters in the show has a T-shirt, with a depiction of a blue Bart Simpson head on it.