sorry you just cant unlock ski diving
you have to beat all olympic rec.s
nope lolz i wish
No you can't unlock Jet.
You Can't He Is Only A Referee
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!
you don't unlock them they are playable when you first get the game
1483rnr or u can do all the challenges
clear the adventure tours
You start off with every character. There are no secret characters to unlock.
There aren't any more characters in it.
Complete the Circuits to unlock the Dream Events.
To unlock events you have to place in the circuits (1st,2nd,3rd) and you will unlock the next circuit and an event.