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The Upgrade Item in Pokemon GO The is an evolution item in Pokemon GO that can make certain monsters in your pocket transform into more powerful versions. It's an important step to mastering the evolution and expanding your Pokedex. The players can upgrade their items by spinning Photo Discs in PokeStops or Gyms for a whole week, as well as through Field Research tasks that are unique to an event. However these items have a low rate of dropping. It is used to transform Porygon into Porygon2 In Pokemon Go players can use a special item call