Sonic will appear during the final battle in the Subspace Emissary
In the cutscene before the final battle with Tabuu, Sonic will appear and shatter Tabuu's wings. Sonic can then be chosen as one of the characters to fight Tabuu, and then you've unlocked Sonic the Hedgehog!
The Final Smash becomes available when you break a Smash Ball. To activate it, press your SPECIAL button (usually B or 1).
You don't unlock him! If you unlock Sonic and play as him, Super Sonic is his final smash.
HUH? What are you talking about? You don't GET ANY bosses in any way, other than as Trophies, which you do by doing the final blow to the boss with a Trophy Stand item and then picking it up before the match ends.
Sonic will appear during the final battle in the Subspace Emissary
By completing SSE (Subspace Emissary or Adventure Mode.)
Sonic because sonic beat tabuu in the subspace of emissary and no one else and his final smash is very powerful.
You cant. Tabuu is the final boss in subspace emissary, but you can get a trophy of him by facing him on insane and tagging him with a smash coin when his health is really low.
He is the Final boss of the Subspace Emissary in Super Smash Bros Brawl who is responsible for all the events and appearing of enemies. ( If you are fighting him watch for the attact where he goes to the backround and spreads his "wings") Tabuu has a lot of power from super smash bros. brawl
at the end of subspace sonic will appear on the final boss kill the final boss to unlock sonic
Tabuu is the final opponent faced on Super Smash Bros Brawl. You can fight Tabuu after defeating all previous foes in the Great Maze stage of the Subspace Emissary, he is in the center of the maze. He is incredibly hard to beat, so be prepared for a fight.
In the cutscene before the final battle with Tabuu, Sonic will appear and shatter Tabuu's wings. Sonic can then be chosen as one of the characters to fight Tabuu, and then you've unlocked Sonic the Hedgehog!
In the Great Maze, you need to beat all of the "clones" of all of the characters (minus Sonic) and all of the bosses. Then, go to the center of the Great Maze, and there should be a portal leading you to the final boss.
If you mean in The Subspace Emissary, then the final level is The Great Maze, but there are four of those. Beat all the bosses, and then, you will have to go through the huge door in the middle room of The Great Maze, and you get Sonic and fight Tabuu.
Do one of the following: ● Beat Sonic after beating Classic mode with 10 different characters. ● Beat Sonic after playing in brawls for 10 hours. ( This is the easiest way, just leave the game on over night and battle him in the morning ) ● Have Sonic join you in The Subspace Emissary. ● Beat Sonic after playing 300 brawls. ● Play the Subspace Emissary and get to the final boss in the game, Tabuu. you will have to beat Tabuu in order to unlock him.
"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"