No. Ridley is in Brawl as a trophy and as a boss, but not as a playable character.
They can't be unlocked. That was just an April fool's joke.
All-Star mode is unlocked by unlocking every playable character.
Ridley is unable to be unlocked as a playable character. The Trophy pops up in the Ridley boss fight, though.
They are already unlocked in Super Smash Bros. Melee. Unless you mean the trophy, you need to complete Classic, Adventure, or All-Star Modes to unlock their trophies.
Sonic is not a playable character in Super Smash Bros. Melee; only in Brawl. Therefore, he cannot be unlocked in Melee.
No
No.
No he is not.
You can't get sonic in SSBM only in SSBB and in SSBB you get him at the subspace emissary near the end
yes
No.
no.