I can connect to WFC with Mario Kart but not Tetris DS.
I get unable to connection using this WFC ID.
Still trying to figure it out..
My next plan of attack is to use an older client to transfer the game over.
The funny thing is... Tetris DS WFC worked the first time I tried.
Well, now I´ve been able to play online with both Mario Kart, Tetris, Metroid, Tony hawk when connecting with a Netgear wireless router (I was using the latest of all software). But, whenever I attempt to connect at a nintendo wifi hotspot I get the message Unable to connect with this WFC ID. Very annoying.