Earth Day 2018

Earth Day in 2018 was the first Earth Day event in Pokémon GO.

Mission Blue, an organization dedicated to protecting the oceans, needed the help of Pokémon GO Trainers. So they teamed up with Niantic to host clean-up events around the world.

Niantic and The Pokémon Company collectively donated $250,000 to Mission Blue.

Features
The following rewards were unlocked worldwide, and were available until April, 2018. The rewards became available at 9:00PM UTC on Monday, April, 2018 along with shiny Wailmer.

Featured Pokémon
Selected Grass-, Water- and Ground-type Pokémon had increased spawn rates in the wild (and from Incense, Lure Module):

These Shiny Pokémon would be released with the start of the event:

Avatar items
These avatar items were released with the beginning of the event: