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 of Sonic the Hedgehog" is known for its bright colors and whimsical humor, "Sonic the Hedgehog" featured darker, more dramatic stories which still constitute a departure from the tone of most of the "Sonic" games. This adaptation follows Sonic and his fellow 'Freedom Fighters' who attempt to liberate Mobius from the grip of Robotnik, who plans to robotocise everything. The "Sonic the Hedgehog" comic book series by Archie Comics uses several characters from this series. A two-episode OVA adaptation was released in Japan in 1996. It was released in North America in 1999 under the name "Sonic the Hedgehog: The