The lights are on
yeah, so essentially, u get these credits u use to spend on unlocking bonuses for the game (music, art, etc...) well, for MP3 amid the red, gold, and blue credits u get, u also get friend vouchers. now what these do is u give them to a friend that has the same game and it gives THEM green credits which allows them to purchase unlockables. and in return said friend (if they r nice enough) will send u their vouchers and u get credits too. in my opinion its a really pain in the butt...but im sure nintendo figured that this will be easy for the wii player that has a strong 'community' of wii friends.