Marty McFly

Marty McFly is a character from the Back to the Future movie series.

History
Bart was running from a mob of Springfieldians who were under hypnotic influence and bent on killing him. Bart happened upon Marty McFly, took his skateboard, and said, "Sorry, kid, I need this more than you!" as he skated away. Without his skateboard, however, Marty was quickly caught and beaten up by Biff Tannen and his gang.

Non-canon
In Chief Wiggum's dream of being a cop in the future, Marty and a young girl were riding on hoverboards when he said that he was hungry and asked her if she wanted some space ice cream. She replied that since she was his clone-daughter, he already knew that she wanted ice cream, and also what flavor. Just then, Snake Jailbird happened by and stole Marty's bitcoins, and she cried out in dismay that was the money he was saving to send her to college. However, Snake's getaway was cut short, and he was quickly arrested, thanks to the timely arrival of Wiggum and Officer Shooty.

Marty appeared along with Doc Brown in the background of the  LA-Z Rider  couch gag, in the scene where Ned was holding a gun on Selma.