Sinnoh Celebration Event

Sinnoh Celebration Event was an event in Pokémon GO focusing on the Sinnoh Region. It was a part of Season of Celebration.

Pokémon Spotlight Hour featuring Drifloon was available during this event.

Featured Pokémon
These Shiny Pokémon were released with the start of the event: PS Buizel PS Floatzel

Selected Pokémon had increased spawn rates in the wild and from Incense or Lure Modules:

5-km Pokémon Eggs obtained during the event would hatch more of these Pokémon:

The following Raid Bosses were available for a time of this event.

Field Research event tasks
There were several Field Research tasks exclusively for the duration of the event.

Collection Challenge
To complete the Collection Challenge, Trainer must catch all of the following Pokémon during the event.

Controversy
Many players had expressed the difficulties of finding Shadow Pokémon required to complete the Collection Challenge, especially Snover. Team GO Rocket Grunts appeared randomly and Ice-type Grunts were relatively rare. Even if one encountered an Ice-type Grunt, the chance of catching Cloyster was higher than Snover.