A new Mystery Gift distribution is now available for Pokémon Sword and Shield players to take advantage of. You can now use the special code ADVENTUREB9F to receive 12 Big Nuggets and 12 Exp. Candy XL in your game. This distribution offer is currently only available through April 3 at 14:59 UTC, so be sure to take advantage of it before it’s too late. Pokémon Sword and Shield are available as Nintendo Switch-exclusive games.
Source: The Pokémon Company