Niantic announced a Pokemon Go Adventure Week celebration that increases the spawn rates of Rock-type Pokemon.
Adventure Week starts at 1 p.m. PT on May 18, with festivities lasting a full week until 1 p.m. PT on May 25. Niantic specifically suggested for players to be on the look out for rare Rock-type fossil Pokemon Omanyte, Kabuto, and Aerodactyl.
To help evolve these and other rare Pokemon, buddy Pokemon will find four times as much candy as usual. More items will be rewarded at PokeStops, and Poke Balls will be half-off in the shop during the week-long event as well. Plus, everyone will get a new free accessory, the Adventure Hat.