By completing SSE (Subspace Emissary or Adventure Mode.)
It's easy.Just unlock sonic, (Subspace Emmisary or 500 brawls)use his final smash and you'll be Super Sonic.
You can't.
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.
Dark super Sonic is not a character in Super Smash Bros Brawl.
Super Sonic
no he ain't but you can be super sonic if you get a smash ball with sonic in brawl
Get Super Smash Bros. Brawl
super sonic
Shadow from Sonic is not playable in Super Smash Brothers Brawl. The only playable character from the Sonic franchise in Super Smash Brothers Brawl is Sonic himself.
If you mean S.S.B.B. (super smash bros brawl) then yes.
no, however you can unlock him in super smash bros. brawl
His final smash is super sonic, and he goes flying into people.
No but you can be sonic on super smash bros brawl
no no no why is because sonic is not in super smash bros. or super smash bros melee he's in super smash bros brawl but not in the other games