Doctor Eggman, also known as Dr. Eggman or Dr. Ivo Robotnik, is the main antagonist of the Sonic the Hedgehog series. He is a brilliant but evil scientist and inventor who constantly tries to conquer the world and defeat Sonic and his friends. Eggman is known for creating powerful robots, machines, and elaborate schemes, often serving as the central villain driving the conflict in the series. His over-the-top personality, mechanical genius, and recurring rivalry with Sonic make him one of the franchise’s most iconic characters.