Pokémon GO announced Adventure Week – a celebration that started on May 18, 2017, and will end on May 25, 2017. The big thing about this event is that players will see more Rock Pokémon than usual. The announcement specifically named Omanyte, Kabuto, (and their evolutions) and Aerodactyl.
Players could obtain a free Expedition Hat from the wardrobe while Adventure Week was taking place. In addition, Buddy Pokémon will find Candy four times as fast, and PokéStops will provide more items.