Get 12 Quick Balls
Download Pokémon Brilliant Diamond or Pokémon Shining Pearl from Nintendo eShop by February 21, 2022, and you’ll receive a code for 12 Quick Balls.
These will come in handy during the early part of your adventure through Sinnoh, because if you use a Quick Ball right after a battle starts, you’ll have a better chance of catching a wild Pokémon right away.
The code will be available from November 19, 2021, until February 21, 2022, and it will be valid through February 28, 2022.
Please note that this code can only be used once.