Dr. Eggman Robotnik is the son of professor Gerald. He is an evil scientist that tries constantly to rule the world but his plans always fail because of Sonic The hedgehog and his friends. He has appeared in many sonic games mostly as the main villain or sometimes a minor one. He tried to trick Knuckles the echidna to defeat Sonic so he could steal the emerald but failed. He created Metal Sonic and a lot of other contraptions. He's also been in Sport Games and other spin-offs as well.