Robotnik, also known as Dr. Eggman, is a fictional character from the popular video game series Sonic the Hedgehog. He is often portrayed as the main antagonist, constantly trying to capture Sonic and take over the world. With his genius-level intellect and a knack for creating robots, Robotnik uses his inventions to carry out his evil plans. Despite his villainous nature, Robotnik is a complex character. He is known for his distinctive round shape, bushy mustache, and red outfit. His obsession with power and control often leads to humorous situations, making him a memorable and entertaining character in the Sonic universe.