Sonic the Hedgehog(ソニック・ザ・ヘッジホッグ,Sonikku za Hejjihoggu?), trademarked as Sonic The Hedgehog, is a title character and the protagonist of the Sonic the Hedgehog series released by Sega, as well as in numerous spin-off comics, cartoons, and a two-episode OVA. The first game was released on June 23, 1991, to provide Sega with a mascot to rival Nintendo's flagship character Mario (see 1991 in video gaming). Since then, Sonic has become one of the world's best-known video game characters, with his series having sold more than 80 million copies. In 2005, Sonic was one of the first game character inductees into the Walk of Game, alongside Mario and Link.
Sonic the Hedgehog (also called Sonic the Hedgehog 2006, or Sonic Next-Gen to differentiate it from similarly titled games) is a video game featuring Sonic for the Xbox 360 and the PlayStation 3. The Xbox 360 version was released on November 14, 2006, but the PlayStation 3 version had been delayed until January 30, 2007. It was developed by Sonic Team and directed by Shun Nakamura, and marks the 15th anniversary of Sonic the Hedgehog.
...that Amy Rose was called "Rosy the Rascal" in Sonic the Fighters? (In a Sonic comic, "Rosy The Rascal" is an evil version of Amy, from the same dimension as Evil Sonic.)
...that Super Sonic was based on a Golden Warrior's legend?
...that Sega accidentally leaked a beta of Sonic The Hedgehog 4 Episode II as of April 21, 2012?
...there is a gene named after Sonic the Hedgehog? A potential macrocycle inhibitor of this gene was named "Robotnikinin" after Sonic's nemesis, Doctor Robotnik.
...that one of Sonic's original names was Mr.Needlemouse?
...that Sonic is only 3'3" tall?
...that Shadow the Hedgehog was originally going to be called "Terios" which in Japanese means, the shadow of a character.