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 3 other Americans. The American side worked on "Sonic Spinball", while the Japanese side developed "Sonic the Hedgehog 3". Yuji Naka and Hirokazu Yasuhara were the primary creators of the "Sonic 3" design document and project schedule. The original prototype for "Sonic 3" was not a side-scroller; rather, it was an isometric game. The concept was abandoned early as the team did not want to change the "Sonic" formula too radically for a sequel. It was eventually used for "Sonic 3D Blast" in 1996. According to Naka, the team felt that they needed a deeper story to expand the world of