Dr. Robotnik, also known as Eggman, is the primary antagonist in the Sonic the Hedgehog video game series created by Sega. He is a brilliant but evil scientist with a penchant for creating robots and machines to capture Sonic and take over the world. With his iconic round shape, mustache, and red jumpsuit, Dr. Robotnik is known for his cunning plans and relentless pursuit of power. Despite his intelligence, he often underestimates Sonic and his friends, leading to his frequent defeats. His character has become a staple in gaming culture, representing the archetypal mad scientist villain.