Sonic is the only playable character, but Shadow is a helper. I think Tails is one too.
Just sonic.
No, in fact Shadow isn't even in Super Smash Bros. Brawl. He is from the Sonic games. Sonic however, isn't from Super Smash Bros. Brawl but Sonic is in Super Smash Bros. Brawl.
Sonic Underground is an animated TV series. And no, you cannot unlock episodes, or characters other than Sonic, from Sonic Underground in Super Smash Bros Brawl.
Snake and Sonic are new characters.
Super Sonic
Falco fox pikachu sonic
Dark super Sonic is not a character in Super Smash Bros Brawl.
Complete Classic Mode with ten characters in brawl--Nobody
"Clear Classic Mode with 10 Characters or 300 matches. Sonic is also known to appear randomly after clearing a few brawls, just try playing the subspace emissary and clear the stage.""http://hubpages.com/hub/how-to-unlock-brawl-characters--how-to-unlock-super-smash-bros-brawl-characters--unlock-brawl-characters--wii"
no he ain't but you can be super sonic if you get a smash ball with sonic in brawl
35 characters are in super smash bros brawl
There are no more characters from sonic the hedgehog in super smash brothers brawl. I know... it's sad. They could've at least put shadow in the game. Happy to help!!!! Zerome!!!!