Water Festival in 2018 is the second Water Festival event in Pokémon GO. It was related with beginning of summer.
A shiny variant of Shellder was available for capture in the wild. There were also various Field Research tasks highlighting Water-type Pokémon.
Alongside increased appearance of Water-type Pokémon appearing all over the world, Trainers received 3× Stardust for catching Water-type Pokémon. Plus, 2 km Eggs hatched Pokémon such as Totodile, Mudkip, and Corphish. Trainers earned double Candy and Stardust for every Egg hatched.
Raid Battles also featured powerful Water-type Pokémon for the duration of the celebration, including the return of the Legendary Pokémon Kyogre; with a chance to capture a shiny variant.
Following Pokémon were appearing more frequently in wild: