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https://pokemonblog.com/2020/08/31/the-pokemon-company-will-reveal-code-to-get-kings-rock-in-pokemon-sword-and-shield-during-the-pokemon-korea-champion-invitational-on-september-5/
The Pokémon Company will reveal code to get King's Rock in Pokémon Sword and Shield during the Pokémon Korea Champion Invitational on September 5