Pokemon Bank is the subscription-based storage service that launched with Pokemon X and Y in 2013. The app lets you transfer Pokemon between generations and individual games as well as acting as a cloud storage for your team. The monthly fee for Pokemon Bank is $4.99.
For subscribers, a trio of legendary Pokemon will be offered starting on March 4, 2016 running all the way through October 31, 2016. Players simply need to log on during those dates to claim Regirock, Registeel and Regice. These creatures each come with a hidden ability.
You can get the Pokémon trio by selecting the Pokémon Link option from the menu screen of your Pokémon X, Pokémon Y, Pokémon Omega Ruby, or Pokémon Alpha Sapphire game. Once you’ve received the Pokémon in Pokémon Bank, select Pokémon Link and the three Pokémon will be sent to a Box in your game. The three Pokémon will be sent one at a time from Pokémon Bank. Note that you can receive these Pokémon only once per Pokémon Bank account, even if you have multiple copies of Pokémon X, Pokémon Y, Pokémon Omega Ruby, or Pokémon Alpha Sapphire.
Each Pokemon arrives at Level 50 with their hidden ability and a unique moveset.