Latey near the end of 2008 there had been made a Sonic Game thats online called Sonic Arena 2 you can...

Invite Friends to a party!
Play as Diffrent Class Styles Example: Hedgehog,Emohog,Echinda,Fox And Bat!
Gets Cool Weapons!
Level Up to Get your charcter Stronger!

So what are you waiting for start playing!

Sonic Arena 2 Link:http://nomoreblue.org/cmps_index.php?pageid=arenatwo

Are you intrested of playing the 1st one?
Heres the link to it

Sonic Arena 1 Link:http://nomoreblue.org/sonicarena/one/

~JStar56