Pokémon Bank is an app that lets you store your Pokémon safely in the cloud and it will be releasing on December 27. The Bank allows you to more easily transfer your pocket monsters from game to game, taking away some of the hassle. The service is just $4.99 per year, and the bank can store 3,000 Pokémon so it is a great deal.
There is another reason to subscribe too: the legendary Pokémon Celebi. Just sign up for the service before September 30, 2014 and you will qualify to get the event Pokémon. Once the app is downloaded, use the Pokémon Link to send the time travel Pokémon to your in-game collection. Awesome! Now you are one step closer to catching them all.
Celebi will come in very handy, since he comes with the move Hold Back. This is an attack that won’t drop the target below one hit point. It’s a good move to use when trying to weaken new pokemon just enough to capture them. Just so you know, if you download Pokémon Bank before January 31, 2014, you will also get a free 30-day trial subscription. We don’t know if you can get the event Celebi through the free subscription, but we will know soon enough, since it arrives on December 27.
Source Geek