American players of Pokémon Ultra Sun, Pokémon Sun, Pokémon Ultra Moon or Pokémon Moon can stop by GameStop starting October 21st, 2019 and open their Pokémon Pass app to receive a Shiny Legendary Pokémon.

Get Shiny Lunala or Shiny Solgaleo at GameStop via Pokémon Pass

Take a trip back to the Alola region with the help of Shiny Lunala or Shiny Solgaleo! Get one of these two Legendary Pokémon when you visit a participating GameStop store from October 21 through November 10, 2019. When you get there, open the Pokémon Pass app on your iOS or Android device to receive the code.

When you enter this code into Pokémon Ultra Sun or Pokémon Sun, you'll receive Shiny Lunala. Or enter the code into Pokémon Ultra Moon or Pokémon Moon to receive Shiny Solgaleo.

Each code can be used only once. Shiny Lunala will be Lv. 60 and know the moves Moongeist Beam, Psyshock, Moonblast, and Moonlight. Shiny Solgaleo will also be Lv. 60 and know the moves Sunsteel Strike, Zen Headbutt, Noble Roar, and Morning Sun.

Get details on the free Pokémon Pass app, which you'll need to have installed to receive the code. And while you're at GameStop, be sure to check out new Pokémon TCG products, including the just-announced Sun & Moon—Cosmic Eclipse expansion launching November 1. Plus, don't miss preorder opportunities for Pokémon Sword and Pokémon Shield for Nintendo Switch, launching November 15!

Use these steps, along with your code, to get Shiny Lunala or Shiny Solgaleo:

1. Open your Pokémon Ultra Sun, Pokémon Ultra Moon, Pokémon Sun, or Pokémon Moon game.
2. Select Mystery Gift on the main menu.
3. Select Receive Gift.
4. Select Get with Code/Password, then Yes, then Yes again to connect to the internet.
5. Enter your code.
6. Watch as the Legendary Pokémon arrives in your game.
7. Speak to the delivery person in any Pokémon Center to receive your Legendary Pokémon.
8. Be sure to save your game.

Let your Pokémon collection shine with a Legendary Pokémon at GameStop!

Source: https://www.pokemon.com/us/pokemon-news/get-shiny-lunala-or-shiny-solgaleo-at-gamestop-via-pokemon-pass/