In honor of the Korean 2020 Championship, Pokémon Korea has provided a code for the distribution of a King's Rock for Pokémon Sword & Shield: K2020CHAMP10NS.
Use and Effect
When this item is held by a Pokémon, the likelihood of the opponent flinching from a damaging attack by this Pokémon is increased by 10 %.
This item, when held by a Pokémon and the Pokémon is traded evolves the following Pokémon; Poliwhirl to Politoed and Slowpoke to Slowking.