Either play 20 hours of VS. matches, or play 700 VS. matches.
I believe it is by 20 hours of playing, though I'm not so sure
it's mewtwo
no
yes
Sonic was not released for Super Smash Bros Melee and is not unlockable.
Raichu doesn't exist in melee.
In Melee Mode play over 50 hours of gameplay, alternatively if you have 4 human players in Melee Mode you will only need to play over 5 hours of gameplay. Afterward defeat mewtwo.
you have to win in order to unlock him
all you have to do is beep you do not wast your life on the computer MEANIES
Not available on Brawl, and never will be. Sorry.
You can't. Mewtwo is only in Super Smash Bros. Melee.
Play 1,000 melee matches in melee mode or beat classic mode with mewtwo after unlocking the other secret characters.