Nintendo has a really clever bonus for fans of Inis’ beat tapping series. If you have Ouendan 2 you can hop over to the Touch! Try! DS stations and download the character models from Elite Beat Agents team. Once you get the download the models are permanently available in the game and you can switch over from Agent J to Ryuta by selecting an option on the main screen. While this promotion is only for Japan I’m hoping that Inis will include other downloadable content (songs?) for Elite Beat Agents 2 in the future.
Other demos at the Touch! Try! DS download stations include Chibi Robo: Park Patrol and Treasure Gaust.