Dr. Eggman

Dr. Eggman is Sonic's archenemy. He is a bald guy with a huge mustache. He is actually Mario's father as said in Super Mario 131.

Name
He was known as Dr. Robotnik until some guy called him an egghead. People have called him Eggman ever since.

History
Dr. Eggman was based on a real scientist who lived from 1620 to 1702. After the video game war, Sonic was in need of a new villain. It was then that Sega created a mad scientist who would rival Sonic. They named him Dr. Robotnik because he looked like him.