Mecha Sonic is a robotic doppelganger of Sonic the Hedgehog, appearing in various Sonic the Hedgehog games and media adaptations. Created by Dr. Eggman, Mecha Sonic is designed to match or surpass Sonic's abilities, serving as a formidable adversary to the hero. With his metallic body and advanced weaponry, Mecha Sonic often confronts Sonic in high-stakes battles. His role is typically that of an antagonist, testing Sonic's skills and determination throughout the series.