R2-D2

R2-D2 is a character from Star Wars.

History
He appears in a commercial for the Bi-Mon-Sci-Fi-Con, in a tag team wrestling match watching his counterpart C-3PO being demolished by two Cylons from Battlestar Galactica. He also appeared in Bart's daydream of his Moon Party that he would have with $1,000, playing a bass guitar.

Comic Book Guy has a statue of R2-D2 in The Android's Dungeon & Baseball Card Shop.

R2-D2 appeared on the poster for Star Wars Episode VII: The Apology.

Non-canon
Apu wears an R2-D2 costume for Halloween.

In the future, Homer's head is mounted on a R2-D2-looking robot.