Date + Time
Wednesday, March 24, 2021, at 10:00 a.m. to Monday, March 29, 2021, at 8:00 p.m. local time
Features
- Castform will be appearing more frequently in the wild throughout the event, alongside other Pokémon that tend to appear when it’s either rainy and windy, like Wingull and Ducklett. If you’re lucky, you might encounter a Shiny Rainy Form Castform!
Castform (Rainy Form) 
Shiny Castform (Rainy Form)
- Psyduck, Poliwag, Swablu, Drifloon, Mantyke, Tympole, and Ducklett will be hatching from 5 km Eggs.
- The following Pokémon will be appearing in raids.
- One-star raids: Slowpoke, Tynamo, and more.
- Three-star raids: Swellow, Pelipper, and more.
- Five-star raids: Therian Forme Thundurus.
- Mega Raids: Mega Houndoom, Mega Manectric, and Mega Abomasnow.
- Complete event-exclusive Field Research and Timed Research to encounter Pokémon like Rainy Form Castform and more.
- New spring-themed avatar items will be available in the shop!
- From Wednesday, March 24, 2021, at 10:00 a.m. to Saturday, March 27, 2021, at 10:00 a.m. local time, Pokémon that enjoy rainy conditions—like Vaporeon, Lotad, Stunfisk, and more—will be appearing more frequently in the wild.
- From Saturday, March 27, 2021, at 10:00 a.m. to Monday, March 29, 2021, at 8:00 p.m. local time, Pokémon that enjoy windy conditions—like Skarmory, Taillow, Pidove, and more—will be appearing more frequently in the wild.
- Catch Pokémon with Weather Boost to earn extra Stardust.
