To coincide with Pokémon Festa 2018, a new Pokémon GO Week is taking place this month for fans in South Korea. From September 17 to September 25, rare spawns of certain Pokémon are now appearing more frequently in the wild. Specifically, from September 21 to September 23, rare Pokémon such as Feebas and Trapinch are appearing in Seoul while select letters of Unown and Tropius can be found around the Lotte department store and Lotte World Mall. This event is open in admission and free for anyone to take part in. In addition, while supplies last, participants can receive an exclusive Pokémon GO-themed strap.
Thank you for the tips, Fumiyasu Miura.