From now until July 24th, you’ll be able to download the Grass Type Pokémon, Shaymin.
This Shaymin comes with the ability Natural Cure, which allows it to be healed of any status ailments when you switch out in battle. It will already be level 100 and have the moves Seed Flare, Energy Ball, Substitute, and Aromatherapy.
And if you have Shaymin hold a Gracidea, it will change into its Sky Form.
As in previous months, you’ll need to get this one through the Mystery Gift option. You can grab Shaymin in Pokémon X, Pokémon Y, Pokémon Alpha Sapphire, and Pokémon Omega Ruby.