“This bonus Challenge Pack will allow you to enjoy 2-player mini games, competing against your friends at Pool, Bowling, Darts and Golf. You will also be able to customize the principle characters with four alternative costumes for Kazuma, Haruka and Rikiya. (A Completed game save file required to access some of this content.)“
Only issue? Its not free, they will be charging $3.99 for it. All this content was free for Japan, not so much (unless you pre-ordered) for us in the West. Feels good man.