Wolf. You can only unlock him in brawl.
Toon Zelda cannot be unlocked on Super Smash Bros. Brawl, but maybe she can be unlocked on the next Super Smash Bros. game.
Minum and Plusle are not featured in Super Smash Bros. Brawl, and cannot be unlocked.
Captain Falcon is in Super Smash Bros. Brawl, but he has to be unlocked by a series of achievements before you can see him.
Toad is not a playable character in Super Smash Bros Melee and cannot be unlocked.
ancient minister can't be unlocked
Super Smash Bros., Super Smash Bros. Melee, Super Smash Bros. Brawl, Super Smash Bros. for Nintendo 3DS/ Super Smash Bros. for Wii U, Super Smash Bros. Ultimate.
Super Smash Bros., Super Smash Bros. Melee, Super Smash Bros. Brawl, Super Smash Bros. for Nintendo 3DS/Super Smash Bros. for Wii U, and Super Smash Bros. Ultimate.
Bowser comes unlocked
He's already unlocked, if you mean Super Smash Bros.
He is a starter character, therefor he does not need to be unlocked.
Well, first of all, the Super Smash Bros. 2 is Melee, which never featured Sonic or Shadow. Also, Sonic is playable in Super Smash Bros. Brawl, and Shadow is unlocked as an Assist Trophy after unlocking Sonic.
The "sequel" to Super Smash Bros. Brawl, in a way, is Super Smash Bros. for Nintendo 3DS/Super Smash Bros. for Wii U.