Donkey Kong

Donkey Kong is a video game character.

History
He was one of four video game characters to convince Bart to steal a video game.

He was once seen where the Noiseland Arcade had him meeting kids on Fridays (at least, this is what was advertised, as he didn't seem to meet anyone), and was smoking a cigarette when Wiseguy passes by and states that he's "just not a draw anymore." Donkey Kong responds by throwing a barrel at him, causing him to realize that Donkey Kong's "still got it."

During the song "High to Be Loathed", Mr. Burns mentions Donkey Kong, and makes his shadow, among lots of other villains.

Non-canon
He also kidnaps Professor Frink and Bart and Lisa have to chase and use Mario-style transport pipes to get to him. His fighting arena is modeled after one of the stages from the Donkey Kong video game from the 1980s. He gets blown into a sea of green fluid and as he dies his hand shows a thumbs up.

Behind the Laughter
Donkey Kong is a fictional gorilla character who was created by in 1981. His having his thumbs up while sinking is a parody of the movies.