Most people got it from a Nintendo magazine in April about Sonic joining SSBM, but it was an April Fools joke...
No
You can't get sonic in SSBM only in SSBB and in SSBB you get him at the subspace emissary near the end
no.
No , Only In SSBB
Complete the main storyline.
sonic and toad
You can't get sonic in ssbm!!
You can't, you can only unlock him in SSBB.
No, you can't. But you can play as sonic in Super Smash Bros. Brawl, for the wii.
You can't. Apparently, you've heard an untrue rumor. Sorry.
They can't be unlocked. That was just an April fool's joke.
you need to beat sonic in green hill zone in brawl mode