The retail version of Code of Princess, the RPG/beat 'em up hybrid for the 3DS, was released back in October. Just recently, however, the game was put up into the Nintendo eShop for those of us who just like to download our games and jump right into them (or have a fear of boxes). The eShop allows 3DS owners to purchase the game for $39.99 with either their credit card or a Nintendo pre-paid card.
Code of Princess supports up to 4 players in online or ad-hoc local connection. The game boasts over 100 quests for co-op play.
Source: Nintendo.com