The recently released music game is hard to find.
Theatrhythm: Final Fantasy flew off store shelves in Japan when it was released this past week, according to a GetNews Report.
Theatrhythm: Final Fantasy landed in Japanese stores on February 16. According to the report, as soon as stores were opening, the game was beginning to sell out.
Theatrhythm: Final Fantasy is the first 3DS retail game to feature paid downloadable content. Each downloadable song is currently available for 100 yen. You can read impressions of the game's DLC system here.