During the event, there was an increased frequency of Water-type Pokémon encounters in the wild. Pokémon like Magikarp, Squirtle, Totodile and even the elusive Lapras were easier to find in the wild. There was also a higher chance to encounter Pokémon from Johto in water biomes. 
Additionally, a new Magikarp Hat was available, in the hat section of the wardrobe, at no cost.
Following Pokémon were appearing more frequently in the wild: