Sonic the Hedgehog protagonist Sonic the Hedgehog, a blue hedgehog able to run at supersonic speeds, and recurring villain Dr. Eggman, an evil scientist whose ambition is to conquer the world. Among Sonic's many allies, the most well-known include: Miles "Tails" Prower, a twin-tailed, highly intelligent yellow fox who is Sonic's sidekick and best friend; Amy Rose, a pink hedgehog who is Sonic's self-proclaimed girlfriend and a hero in her own right; Knuckles the Echidna, a coolheaded red echidna who is the guardian of the Master Emerald; Shadow the Hedgehog, an anti-heroic doppelgänger of Sonic with a dark past; and Metal Sonic, a
Sonic the Hedgehog October 2012 it was ported to Xbox Live Arcade and PlayStation Network with a version released on Steam in November the same year. The only other Dreamcast "Sonic" game was "Sonic Shuffle", which was released in 2000 and featured cel-shaded graphics and a board game concept similar to that of the "Mario Party" series. Dreamcast sales began to decline after the launch of the PlayStation 2, and therefore few "Sonic" games were released for the system. "Sonic the Hedgehog Pocket Adventure" was also released on SNK's Neo Geo Pocket Color portable console, made in the same style of the Genesis/Mega