The Mythical Pokémon Mew was first available at GameStop stores in February. If you weren't able to make it to GameStop in time, you'll have another chance to receive Mew when the Pokémon Trainer Club newsletter arrives in your inbox in June. It's the same Pokémon that was given out at GameStop, so if you received that one, you won't be able to get another one.
If you're not already receiving the Pokémon Trainer Club newsletter, be sure to sign up for it by June 1, 2016, to receive the next newsletter containing a code for Mew. Be sure to enter the code into your Pokémon Omega Ruby, Pokémon Alpha Sapphire, Pokémon X, or Pokémon Y game by August 31, 2016.
The Pokémon Trainer Club newsletter is full of Pokémon news, promotions, and information to keep you up-to-date in the world of Pokémon. Plus, the newsletter is free—just create a Pokémon Trainer Club account and opt in to receiving it.
Don't miss this second chance to get the Mythical Pokémon Mew. And be sure to visit Pokemon.com/20 for more details on the Pokémon 20th celebration.