Eggman, also known as Dr. Robotnik, is a prominent antagonist in the Sonic the Hedgehog video game series. He is characterized by his rotund figure, bushy mustache, and genius-level intellect, often devising elaborate schemes to capture Sonic and take over the world. As a brilliant scientist and inventor, Eggman creates various robots and machines to aid in his plans. Despite his villainous nature, he is a beloved character among fans for his quirky personality and humorous interactions with other characters in the franchise.