Dr. Eggman

Dr. Ivo Robotnik (or Dr. Eggman, as most people call him) is an evil scientist who wants to conquer the Earth. He has developed a system called Roboticization that allows him to trap innocent creatures inside his robots, called Badniks, so that the creatures will power them. However, his schemes are always stopped by Sonic and company.

He has ties (and a resemblance) to the shadowy figure that Team Pooh encountered. There's a rumor that it may be him.