For a limited time only gamers that are subscribed to Pokemon Bank can pick up the legendary trio of Regirock, Regice and Registeel, as well as Celebi.
These four Pokemon might come in different shapes and sizes but their level is the same, level 50, and are available on the following Pokemon titles:
- Pokemon X
- Pokemon Y
- Pokemon Omega Ruby
- Pokemon Alpha Sapphire
Regirock, Regice and Registeel also come with a Hidden Ability and if you are a subscriber to Pokemon Bank they are quite easy to get a hold of.
In comparison, you have a lot longer to pick up one of the trio, with October 31st the deadline for them, however you're going to need to act fast if you want to catch a Celebi. The green fairy-like Pokemon is only available until March 31st.
For those that are not aware of Pokemon Bank it is an in-game paid subscription service, which can be purchased for $4.99 on an annual basis.
Here is the official PokemonBank.com description of the service: "Pokémon Bank is an application and service for Pokémon X and Pokémon Y that will allow you to deposit, store, and manage your Pokémon in private Boxes on the Internet!"
If you would like to read more about Pokemon Bank, click here.