Although you aren't being specific whether it's Melee, the original, or Brawl, the only game that you can unlock Mewtwo in is Melee(for gamecube). To unlock him, just keep fighting enemies.
No mewtwo is not in ssb
You can't.
First unlock marth to do that beat classic mode on any mode with 13 of the original characters defeat marth to unlock him then use marth to beat classic mode roy will appear defeat him to unlock him.
you cant get mew two on ssbb you can only get him on ssb and on super smash flash
Go on youtube.com/unlock shadow/ssbb.
you need to do adventure as pikachu and jigglypuff
Sorry but U can`t unlock him but hopefully they will make another ssb game that has Goku in or maybe even Vegeta!!
complete practice 1 target test with all of the starter characters
Play 1 Player mode in Very Hard. NO CONTINUES.
Yes.
NO!
no you cant.... you can use hacks