The Coin Launcher, trophy boxes in the Subspace Emmisary, and occasionally, in Home-Run contests.
he`s not there
no you can not but as a trophy
As a playable character,no. The character Sonic is there, but is locked. Knuckles appeared as a collectable trophy :)
He appears as an assist trophy when you unlock Sonic.
No. You can play as Sonic, but not Knuckles. Knuckles is however available as a trophy, or can be seen running along in the green hill zone stage.
he is as an assit trophy, all you need to do is unlock sonic
you cant unlock knuckles
In super smash brothers brawl you cannot unlock shadow. You can only unlock sonic.But you can unlock him in an assist trophy
as a playable character no, he appears randomly inside a assist trophy.
You can't unlock Shadow in SSBM. You can unlock Shadow in SSBB though, he is an assist trophy. In SSBB, you can use a texture hack on Sonic to make him look like Shadow and you can play as him.
Go on youtube.com/unlock shadow/ssbb.
after you unlock all the 35 characters play the allstar mode and you can unlock birdo trophy by clear it on hard mode