Don't underestimate Pokémon just because they don't look tough to you! This month's special code allows you to receive Galladite, Gardevoirite, Lopunnite, and Diancite in your Pokémon Sun or Pokémon Moon game. With these Mega Stones, your Gallade, Gardevoir, Lopunny, and Diancie will be able to Mega Evolve during battle, making these Pokémon way more fearsome than they might initially appear.
Mega Stones special code: POYONG
These Pokémon aren't available in the wild in Pokémon Sun or Pokémon Moon, but you can bring them into Pokémon Bank via Poké Transporter from earlier games. The Pokémon you transfer will lose their items in the process, however, so this distribution is currently the only way to get these Mega Stones in Pokémon Sun and Pokémon Moon.
To get the four Mega Stones:
Select Mystery Gift on the main menu.
Select Receive Gift.
Select Get with Code/Password, then Yes, and then Yes again to connect to the Internet.
Enter your password.
Watch as you receive the Mega Stones.
Speak to the delivery person in any Pokémon Center to pick up your Mega Stones.
Be sure to save your game.
Release the full strength of these powerful Pokémon when you Mega Evolve them in Pokémon Sun and Pokémon Moon with these awesome Mega Stones!
Also, make sure you enter this password by October 31, 2017. That's the final day for Trainers to claim their special Mega Stones, so don't miss out on this opportunity to unlock your Pokémon's Mega Evolutions!