Video game retailers around the world will be distributing serial codes to players of Pokémon Legends: Arceus for free and they can receive a Hisuian Growlithe and 20 Feather Balls.

Distribution Stores:
GameStop: Canada, USA - February 25th, 2022
GAME: UK, Spain - March 4th, 2022
GameStop: Ireland, Italy - March 4th, 2022
Micromania: France - March 4th, 2022
GameMania: Belgium, The Netherlands - March 4th, 2022

Get Hisuian Growlithe and 20 Feather Balls from GameStop

Visit a participating GameStop near you to receive a code card that’ll bring this Pokémon and bonus items into your Pokémon Legends: Arceus game.

Whether you've only just started your journey through the Hisui region in Pokémon Legends: Arceus or you've already been exploring the land for a while now, you're probably researching all kinds of different Pokémon...but have you found Hisuian Growlithe yet? No?! Well, starting February 25, 2022, Trainers in the US and Canada can visit a participating GameStop store in their region to pick up a special code card that will let them add a Hisuian Growlithe to their team—and you'll get 20 Feather Balls, to boot!

The Hisuian Growlithe you'll receive will arrive at Lv. 26, commemorating Pokémon's twenty-six-year history. The 20 Feather Balls you'll receive are great for catching Pokémon from a safe distance. They're also helpful for catching Pokémon that fly high up in the air.

While you're visiting a participating retailer, you can check out the new Pokémon Trading Card Game: Sword & Shield—Brilliant Stars expansion, which releases on the same day!

To claim your in-game gift, follow these steps:

1. Launch your Pokémon Legends: Arceus game.
2. Press the Up Button to open the menu, scroll with the ZL or ZR Button until you reach the Communications screen, then select Mystery Gifts.
3. Select Get with Code/Password to connect to the internet.
4. Enter your code.
5. Watch as the gift arrives in your game.
6. Be sure to save your game.

No purchase is required to receive a code card, but the offer is only good while supplies last, so don't delay.

Source: https://www.pokemon.com/us/pokemon-news/get-hisuian-growlithe-and-20-feather-balls-from-gamestop/