Uno the Medal © 2008 Sega Enterprises, Limited.
This game uses Sega's "Medalink" which is a service that allows up to 16 units or four different games to be connected, but the units must be on the same location.
Released in April 2008.
Game's picture.
Game's screenshots.
Official website: http://medalink.sega.jp/game_u_in_p.html