Jack: "NO. Don't say it."
Fact: Eggman is his official name in Japanese, while merely being a nickname in English.
A fat, mad scientist with an IQ of over 300 who's constantly trying to take over the planet Mobius, and would succeed too if Sonic wouldn't be there to stop him from doing so.
Is able to create robots by the truckload, and uses most of them to try and capture Sonic, or one of his many friends.
He is well-loved by his numerous fans and followers. Robotnik's celebrity status has earned him trillions, and to this day he resides in a comfortable mansion atop a hill, where he may use his wealth to fund the detriment of human rights and the eco-system.
"Oh yea totally! Damn, I can't get that tune outta my head!"
'Yes sir... now where's the oil?'