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For the duration of this event, Trainers all throughout South Korea found more Pokémon appearing across the country in Pokémon GO.
In Seoul, Trainers were able to battle the Legendary Birds across the city. These Legendary Pokémon did not appear in Raid Battles at the Gyms near Lotte World Mall, but there was a special treat in store for those who visited the area. Trainers at Lotte World Mall had a unique opportunity to encounter Mr. Mime and Unown. 
- Increased spawns of various Pokémon including Kanto- and Johto-region Starter Pokémon, Vulpix, Machop, Chansey, Scyther, Snorlax, Lapras, Dratini, Mareep, Larvitar and Miltank.
- Increased spawnrate of shiny Magikarp and Pikachu.
- European region-exclusive Pokémon — Mr. Mime, available to be caught in the wild. 
- Legendary Raid Battles featuring Articuno, Zapdos, Moltres, and Lugia.
- Increased spawnrate of Unown in forms of letters E, L, O, S, and U, which spell "SEOUL". 
Year later again, for the time of the event, Trainers all throughout South Korea found more Pokémon appearing across the country in Pokémon GO.
Additionally between September 21st and 23rd, 2018, rare Pokémon happened to appear more frequently in Seoul and there was opportunity to encounter unusual Pokémon such as Tropius and Unown around the Lotte Department Store, Jasmil Store & Lotte World Mall.
- Increased spawns of various Pokémon throughout South Korea.
- Increased spawnrate of rare Pokémon in Seoul, including Shellder, Aerodactyl, Trapinch and Feebas.
- African region-exclusive Pokémon — Tropius, available to be caught in the wild.
- Increased spawnrate of Unown in forms of letters C, E, H, K, O, S, U, which spell "CHUSEOK".
Following promotional pictures were published by creators of the game across their social media channels.
- Boosted Pokemon spawns at Starfield Hanam and Starfield COEX
- Boosted Growlithe, Wailmer, Solrock, Corsola and Unown spawns
- Shiny Combee may appear
- ↑ 1.0 1.1 1.2 Pokémon GO Events Update–Europe, Korea, and Japan. Pokémon GO Live. Retrieved on 2017-11-03.
- ↑ Pokémon GO Week in Korea!. Pokémon GO Live. Retrieved on 2018-10-11.
- ↑ Unown letters in Week in Korea spell "CHUSEOK" r/TheSilphRoad. Retrieved on 2018-10-11.
- ↑ Pokemon Go Week in Korea just got announced. /r/TheSilphRoad. Retrieved on 2019-04-25.
- ↑ "Pokémon GO" 'Week in Korea' 이벤트가 작년에 이어 돌아옵니다!. Pokémon GO Live - Korea. Retrieved on 2019-04-25.