Pokemon Go was launched last year, and despite expectations that this is just another one-day wonder, the game marks its first birthday this Thursday. Because of the anniversary, Niantic is launching an event called Adventure Week and will bring many incentives for players, willing to catch em all. In the seven days between May 18 and May 25, many Rock-type Pokemon will appear throughout the game. Even if you are collecting Geodudes, rare Pokemon like Omanyte and Kabuto might also arise more often. Increased rate of Rock-type Pokemon will be accompanied with Buddy Candy that will...
Source: http://www.gsmarena.com/pokemon_go_launches_adventure_week_for_its_1st_birthday-news-25095.php