Hes an egg! He can break the rules of time and space and is immune to the plot.
Basiclly he can do anything and we are all doomed-,
He was first seen in a mspaint comic as a side Character. Later on he got his own game called one night at flumpty. Which was made by a developer called jonochrome. That’s also where flumpty got most of his fame from.
Another Five Nights at Freddy's fangame.
And no, not like the cheesy and unoriginal kind. It's done in a cartoonish yet well-done style, and the jumpscares are actually effective, in many people's opinion at least.
For more details, go check out the game yourself. It's free on GameJolt.