Pokemon Sword and Shield Mystery Gift codes: All the codes to redeem for free gifts. Although you could use to get like hacked shinies of the legendaries and gigantamax Meowth, Pikachu, and Eevee. and can be accessed in the 'Menu' section after defeating the first gym leader, Brock.
These are required to play online, and some of them patch glitches that would allow the player to cheat (for example, the patched Exp. Pokemon sword and shield powersaves It will generate even more Watts if you have already beaten the game.