Adventure Week 2017

Adventure Week in 2017 was the first Adventure Week event in Pokémon GO.

Featured Pokémon
Rock-type Pokémon, known in the player community as the "Fossil Pokémon", had increased spawn rates in the wild (and from Incense, Lure Module):

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

Trivia

 * Niantic mentioned few statistics:
 * Back in December, 2016, Trainers collectively walked past the equivalent distance of Earth to Pluto.
 * As of May, 2017, the Pokémon GO community has traveled more than 15.8 billion kilometers.