Dr. Eggman, also known as Robotnik, is a fictional character and the primary antagonist in the Sonic the Hedgehog video game series. He is a genius scientist with a penchant for robotics and world domination, often devising elaborate schemes to capture Sonic and take over the world. With his distinctive round body, mustache, and penchant for creating mechanical minions, Dr. Eggman is a memorable villain. Despite his evil intentions, he often provides comic relief in the series, making him a beloved character among fans of the franchise.