Doctor Ivo Robotnik is the main antagonist of the Adventures of Sonic the Hedgehog television series. He is a human scientist and the arch-nemesis of Sonic the Hedgehog. An evil dictator, Dr. Robotnik uses his incredible intelligence for attempts to conquer Mobius and end his conflict with Sonic. While all his plans always end in failure thanks to the continued efforts of Sonic and his allies, Robotnik is always able to slip away from certain doom or imprisonment and is thus able to return at a later point to plot another evil scheme, making him a constant threat to Mobius and a thorn in Sonic's side.