Dr. Nefarious is a fictional character known as a supervillain in the video game series Ratchet & Clank. He is characterized by his genius-level intellect and a penchant for creating elaborate schemes to conquer the universe. His appearance typically includes a robotic body and a distinctive, menacing face. In the games, Dr. Nefarious often serves as the primary antagonist, using his advanced technology and robotic minions to challenge the heroes, Ratchet and Clank. Despite his evil intentions, he is portrayed with a humorous personality, making him a memorable character in the franchise.