Niantic announced that the Global Water Festival is happening now in Pokémon GO. It began on March 22, 2017, and will end on March 29, 2017. In celebration of the Global Water Festival, Niantic is allowing players to get a free Magikarp Hat for their avatar.
During the Global Water Festival players will be more likely to encounter Magikarp, Squirtle, Totodile, and their Evolutions all around the world. Players that explore areas where Water-type Pokémon more commonly appear will have a greater chance to encounter several of the Water-type Pokémon originally discovered in the Johto region. Niantic coyly suggests that players might possibly run into Lapras.
Some players might not be too exited about encountering lots of Magikarps. They don’t do much of anything at all except flop around, and it takes a lot of candy to evolve them. To make the game more exciting, Niantic has added Shiny Magikarp into the wild. They are extremely rare. If you happen to catch one, Niantic would like you to share a screenshot of it on social media and use #PokemonGo.