No. Only on Brawl
Sonic is not a playable character in Super Smash Bros. Melee; only in Brawl. Therefore, he cannot be unlocked in Melee.
No, Fly Guy is not a playable character in Melee.
No.
No
Only Sonic has been a confirmed playable character.
No, mew is not a playable character in melee
Mew is not a playable character in melee
No, Sonic is not a playable character in Super Smash Brothers Melee. This was an April Fools' day prank by Electronic Gaming Monthly magazine in 2002, and has been proven false many times. Nintendo Power magazine had a small section in their magazine (also in 2002) dispelling this rumor.
Baby bowser is not a playable character in melee
He is already a playable character.
You can't. He's not a playable character.
You bet he is! :)