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The Upgrade Item in Pokemon GO The is an evolving item in Pokemon GO that can make certain monsters in your pocket evolve into more powerful versions. It's an important bridge to learning the evolution and expanding your Pokedex. Players can upgrade their items by spinning Photo Disks in PokeStops or Gyms all day long and also by completing Field Research tasks that are specific to an event. These items aren't common, but they do drop. It is used to evolve Porygon into Porygon2 In Pokemon Go players can use an item called Upgrade to transform Pokemo