New details about the Pokémon GO part of Pikachu Outbreak have been revealed. In addition to the Pokémon GO Stadium on August 14, the Pokémon GO Park event will be held in Yokohama, Japan, throughout the duration of the annual Pikachu Outbreak. The new event will take place in Red Brick Park and Cup Noodle Museum Park from August 9 to August 15.
EVENT EFFECTS: Both Farfetch'd and Mr. Mime will be available. Special 2KM Eggs, likely the same we saw at GO Fest, will drop from event PokéStops. Red Brick Park, the temporary "Kanto Park," will spawn more Generation 1 Pokémon. Cup Noodle Museum Park, the temporary "Johto Park," will spawn more Generation 2 Pokémon. This means the two parks will act similarly to the Type-zones at GO Fest.
EVENT EFFECTS: Both Farfetch'd and Mr. Mime will be available. Special 2KM Eggs, likely the same we saw at GO Fest, will drop from event PokéStops. Red Brick Park, the temporary "Kanto Park," will spawn more Generation 1 Pokémon. Cup Noodle Museum Park, the temporary "Johto Park," will spawn more Generation 2 Pokémon. This means the two parks will act similarly to the Type-zones at GO Fest.
SOURCE: Pokémon GO Japan & GO Hub