Never lose a single match and beat Metal Sonic once and during the second round Sonic will go super.
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you can only play as super sonic when you fight the finalhazard.
you cant sonic the hedgehog doesn't have super sonic
Super Sonic is not playable in this game.
You don't unlock him! If you unlock Sonic and play as him, Super Sonic is his final smash.
Sonic the fighters is not downloadable, most people say it's illegal, and for those of you saying that there is a sonic the fighters 2 and it's downloadable, then you are wrong. There is no sonic the fighters 2.