Throwback Challenge: Sinnoh
From Friday, May 22, 2020, at 1:00 p.m. to Friday, May 29, 2020, at 1:00 p.m. local time, you’ll have access to the Throwback Challenge 2020: Sinnoh Timed Research.
It’s time to revisit the adventures we had in the Sinnoh region from Pokémon Diamond and Pokémon Pearl together! Power up a Pokémon as an homage to the Trainers’ School in Jubilife City, and take a snapshot with a Steel-type Pokémon you caught in remembrance of exploring the mines on Iron Island! Complete all eight sets of tasks in the Sinnoh Timed Research to earn 10 Rare Candies and a reward encounter with a Cresselia that knows the event-exclusive attack Grass Knot.
Bonuses 
Features 
- Pokémon originally discovered in the Sinnoh region will also be available to battle in raids.
- In honor of Lucario being chosen in the Pokémon of the Year vote as the number-one Pokémon originally discovered in the Sinnoh region, Pikachu wearing Lucario hats will be appearing in the wild!
- If you’re lucky, you might find a Shiny Glameow!
- Event-exclusive Field Research tasks will reward encounters with Pokémon originally discovered in the Sinnoh region.
Spawns 
Pokémon originally discovered in the Sinnoh region, such as Cherubi and Glameow, will be appearing more frequently in the wild.
Geodude
Misdreavus
Turtwig
Chimchar
Piplup
Starly
Bidoof
Kricketot
Combee
Cherubi
Cherrim
Drifloon
Buneary
Glameow
Stunky
Hippopotas
Croagunk
Finneon
Snover
In honor of Lucario being chosen in the Pokémon of the Year vote as the number-one Pokémon originally discovered in the Sinnoh region, Pikachu wearing Lucario hats will be appearing in the wild!
Pikachu
Eggs 
In 7 km Eggs
Cranidos
Shieldon- Glameow
Chingling
Bonsly
Happiny
Gible
Munchlax
Riolu
Mantyke
Raids 
Pokémon originally discovered in the Sinnoh region will also be available to battle in raids. Check out the full list here after the event starts.
Shiny 
These Pokémon will be released in their shiny variant with the start of the event.
Glameow
Purugly
Research 
Graphic 
