From now until August 14th Pokémon Sun and Moon players can get a Shiny version of Tapu Koko through the Nintendo Network.
To get Tapu Koko in your Pokémon Sun or Pokémon Moon game:
- Select Mystery Gift on the main menu.
- Select Receive Gift.
- Select Get via Internet, and then Yes to connect to the Internet.
- Watch as you receive Tapu Koko.
- Speak to the delivery person in any Pokémon Center to pick up Tapu Koko.
- Be sure to save your game!
For more info, including a way to buy a Shiny Tapu Koko Plush, head on over to http://tapukoko.pokemontcg.com/en-us/.