no unfortunately it is only a single player game
no. he can only use his power in missions not in two players.
No, but there is a multiplayer battle mode for up to four players.
No.
Probably Sonic 4 episode 2
In Sonic Heroes for the PS2 and I think Sonic The Next Generation or something.
Sonic the Hedgehog 4: Episode 2.
If your talking about the original Sonic the Hedgehog, then Sonic and the Secret Rings is way better.
You cant do storyline on 2p but if you go to two player there is stuff you can do there
no
you have to beat green hill with both classic sonic and modern sonic
Not classic,but yes.
It is impossible to say because there is always another sonic game.