Looks like its a Tigers based trivia game, as well as having a database of info on players. I guess it has some minigames as well, but I didn't look around much as I was hoping for more of an actual baseball game.
I also find it funny that they're selling this for about 50 bucks. Seems like something they would give away at a game really. DS night at Koshien Stadium, or something. But then, I guess I'm not as big of a fan as some others...