In addition to the regular version of Shin Megami Tensei X Fire Emblem (Genei Ibun Roku #FE), Nintendo has also released two special versions of the game in Japan. [Thanks, @NintendDaan.]
The first limited edition is called the Fortissimo Edition, and the second is a Wii U bundle called Fortissimo Edition Set. Both come with a collection of bonus items, including a six-song soundtrack and an artbook. You can take a look at all the goodies that come with the special editions below.
Shin Megami Tensei X Fire Emblem is available in Japan for the Wii U. It will release in North America and Europe sometime in 2016.