you cannot play as (metal sonic) on Mario and sonic at the OLYMPIC games,but a new game has came out in 2009 and its called,Mario and sonic at the winter olympic games and you can play as (metal sonic) on that game and heres the best part.you don't even have to unlock him because he is already there!
Bowser Jr., Metal Sonic, Bowser and Dr. Eggman.
you cannot play as silver in Mario and sonic at the olympic games i am improving your question and i have played it and you can play silver and metal sonic joiunir bowser or donkey kong (this is in the winter olympic games)
to unlock bowser jr and metal sonic you need to complete the game and at the end bowser jr and metal sonic agree to put green missions on all of the towns and islands complete all of them then bowser dr eggman bowser jr and metal sonic join you
you can't
The answer is Bowser, Eggman, Bowser Jr, Metal Sonic.
You cannot unlock Metal Mario, as he is not a playable character. The only way to play as him is to cheat and use the Gameshark.
from the left, bowser eggman, bowser jr., metal sonic.
the new characters are...silver,metal sonic,donkey Kong and bowser jr.
New Mario characters: Donkey Kong, Bowser Jr. New Sonic characters: Metal Sonic, Silver
Bowser, Bowser Jr., Metal Sonic and Dr. Eggman.
Unlock Wario and get the flower power in levels and you are metal.
bowser,dr.eggman,bowser jr,metal sonic