The main villian of the famous game series Sonic the Hedgehog. Real name Dr. Ivo Robotnik. He's a scientist obsessed with showing the world how great he is. "The Greatest scientific genius in the word." as he calls himself. Many incarnations had followed him as many different cartoons of Sonic had appeared but the name Eggman differs him from the rest and marking him as the original Sonic villian.
Eggman "Ahh, if it isn't Sonic!"
Sonic "Look, a giant talking egg."
Eggman "I am Dr. Robotnik! The greatest scientific genius IN THE WORLD!" ~ Sonic Adventure/DX
Eggman "Join the Eggman Empire!" ~ Sonic Adventure 2