The classic sonic came out in 1991 which was 20 years ago after the classic sonic came out I'm not sure how many years after though, modern sonic came out, so the answer is 1991.
It is come from sonic CD
The song They Call Me Sonic, is by Sonic Arcade.
No he does not come out on sonic x
Sonic The Hedgehog Comic
sonic shadow
sonic shadow
i think 2012 sonic night riders is going to come out I'm a sonic fan
Sonic Colors came out after Sonic 4 EP: 1.
sonic adventure 3? sonic unleashed 2? or sonic heroes 2?
sonic shadow
Sonic never died...
Sonic RPG episode 10 will come in mid of 2014.