Season of Celebration

Season of Celebration is an event lasting with the first Season in Pokémon GO. It was announced on the update GO Beyond. This season celebrates the real world winter in the north hemisphere and summer in the south hemisphere.

During this Season, Trainers will be able to participate in a series of in-game events featuring Pokémon first discovered in different regions (Kanto, Johto, Hoenn, Sinnoh, Unova, or Kalos). At the end of the Season of Celebration, a brand-new global event experience will be introduced.

Featured Pokémon
Two Deerling forms were released with the start of the event:

Winter-themed Pokémon had increased spawn rates in the wild and from Incense or Lure Modules:

Summer-themed Pokémon had increased spawn rates in the wild and from Incense or Lure Modules:

Different Pokémon will be hatching from Eggs! Growlithe and Wingull will be hatching from 2 km Eggs, and Baltoy and Ducklett will be hatching from 5 km Eggs. Shinx will be hatching from the 5 km Eggs you receive from Adventure Sync rewards instead of Ducklett. Seel, Aron, and Elgyem will no longer be hatching from Eggs.

List of Season of Celebration Events
Kalos Launch Event