Following the whole eShop debacle during the holidays, Nintendo removed the Pokemon Bank from the Japanese eShop and indefinitely delayed its Western release. We still never got word as to when we could expect the service in the West, but seems to be available now.
Pokemon Bank is a subscription based service where you can store up to 3000 Pokemon across Pokemon X, Pokemon Y, Pokemon Black & White and Pokemon Black & White 2. The service costs $4.99 a year, and if you download the app before March 14th you’ll get to try it free for a month.
A friendly reminder, if you use the service before September 30th, you’ll get a free Celebi.