Doctor Ivo Robotnik[9] (ロボトニック[10][11] Robotonikku?, lit. "Robotnik"), better known by the alias Doctor Eggman[12] (ドクター・エッグマン[13] Dokutā Egguman?), is the main antagonist of the Sonic the Hedgehog series. He is an evil human scientist and the arch-nemesis of Sonic the Hedgehog. Boasting an IQ of 300,[2] Eggman is a self-proclaimed evil scientist[14] and a genuine genius megalomaniac[15] who dreams of dominating the world with his Eggman Empire using his scientific expertise. For all his brilliance, however, Sonic and his friends constantly find a way to foil his plans and keep him at bay.