Pokémon GO history · #0562
Yamask in Pokémon GO.
Every recorded Yamask raid run in Pokémon GO with its dates and tier, and when its Shiny arrived.
Shiny release
Shiny Yamask first appeared on October 17, 2019, during Halloween 2019.
- Yamask
- Cofagrigus by encounter; Shadow
Shiny Galarian Yamask first appeared on October 20, 2022, during Halloween 2022 - Part I.
Raid history
| Dates | Raid | Event |
|---|---|---|
| Nov 3 to Nov 10, 2025 | 1-starGalarian Form | Regular rotation |
| Oct 21 to Oct 27, 2025 | 1-starGalarian Form | Halloween 2025 Part I |
| Dec 2 to Dec 8, 2024 | 3-starGalarian Form | Regular rotation |
| Oct 22 to Oct 28, 2024 | 1-star | Halloween 2024 Part I |
| Oct 14 to Nov 4, 2024 | 1-starGalarian Form | Halloween 2024 Part I |
| Nov 1 to Nov 3, 2023 | 1-starGalarian Form | Regular rotation |
| Oct 20 to Nov 1, 2022 | 1-star | Halloween |
| Oct 20 to Nov 1, 2022 | 1-starGalarian Form | Halloween |
| Oct 17 to Nov 1, 2019 | 2-star | Halloween 2019 |
Common questions.
When was Shiny Yamask released in Pokémon GO?
Shiny Yamask first appeared in Pokémon GO on October 17, 2019, during Halloween 2019.
When was Yamask last a raid boss in Pokémon GO?
Yamask was last in 1-star raids (Galarian Form) from November 3, 2025 to November 10, 2025.
What kind of raids has Yamask appeared in?
Yamask has appeared in 2-star raids, first on October 17, 2019; 1-star raids, first on October 20, 2022; 3-star raids, first on December 2, 2024.