For the 20th Year Anniversary of Pokemon, this month’s Mythical Legendary Pokemon will be
Shaymin. It will only be available from July 1-24 2016. Only for Pokemon X and Y, Omega Ruby and Alpha Sapphire.
Level : 100
Ability: Natural Cure
Shaymin can dissolve toxins in the air to instantly transform ruined land into a lush field of flowers.
You can get this Mythical Pokemon by simply going to Mystery Gift. Then choose Receive Gift, Get Via Internet and after receiving it. Go to the nearest Pokemon Center and talk the lady NPC standing at the corner to receive the gift.