You now have some ways to transfer old Pokémon and store a ton of them online.
Two services for transporting your Pokémon to an online storage service, Pokémon Bank and Poké Transporter (Pokémover in Japan), have been in the works and are planned to be released this year.
Pokémon Bank allows owners of Pokémon X and Pokémon Y to move their creatures into a total of 100 online boxes which in total have enough room to hold 3,000 Pokémon. Poké Transporter is a an application that can be used with Pokémon Black/White and Black/White Ver. 2 to transfer Pokémon to the Pokémon Bank. Once in the Pokémon Bank, the creatures can then be transferred into Pokémon X or Pokémon Y. For users to take advantage of Pokémover, they have to play the above games on the Nintendo 3DS. Poké Transporter is included with Pokémon Bank as a linked application.
Pokémon Bank is releasing in Japan on December 25 on the eShop for 500 yen and require an annual fee in order to maintain usage of the service. In Japan, the service will be free from the launch of the service until January 31. Information on the Western release dates of the software will be added to the official Pokémon websites soon.