Sinnoh Celebration 2020

Sinnoh Celebration is an event dedicated for Pokémon originally discovered in the Sinnoh region.

Featured Pokémon
Moreover, these Shiny Pokémon were released with the start of the event.

Additionally, 7-km Eggs obtained during the event only hatch these Pokémon:

Field Research event tasks
There were several Field Research tasks exclusively available only during the event.