Supersonic is a fictional character from the Sonic the Hedgehog series, developed by Sega. Introduced in 1992, Supersonic is an enhanced form of Sonic the Hedgehog, which he achieves by collecting all seven Chaos Emeralds. In this form, Sonic gains extraordinary speed, invulnerability, and the ability to fly, distinguished by his golden yellow appearance and red eyes. Supersonic has become a fan-favorite for his raw power and the dramatic moments his transformations often herald in the series' storylines.