The second Pokémon GO Adventure Week kicks off today, May 24, featuring increased spawns of Rock-type Pokémon like Aerodactyl, extra XP at PokéStops and more Candy from Buddy Pokémon until June 5. The official announcement from the development team at Niantic is as follows:
Leave No Stone Unturned during This Adventurous Event!
Adventurous new research is on tap during an exciting in-game celebration! Starting on May 24 at 1:00 P.M. PDT, unique Field Research will be available with some exciting rewards, including a Raid Battle appearance by Pokémon such as Aerodactyl.
Throughout the celebration, Rock-type Pokémon such as Geodude, Lileep, and Nosepass will appear more frequently in the wild. There are also incentives to trek around: your Buddy Pokémon will earn Candy 4× faster throughout the event! Plus, you’ll receive extra XP for spinning the Photo Discs at PokéStops or Gyms—up to 10 times the usual amount if this is your first time encountering a unique PokéStop or Gym!
Fortune favors the bold, Trainers, so join this adventure before it ends on June 5. Get up and GO!
—The Pokémon GO team
Source: Official Pokémon GO blog