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How to Upgrade Items in Pokemon GO The Upgrade is one the most valuable items in Pokemon GO. It lets trainers evolve Porygon into Porygon2 and also gives them the chance to grow in their Pokedex. This item is rare but it is available by spinning a Photo Disk at a Pokestop, or as a prize during special events. What does this item actually do? Components Upgrade components are things that can be slotted into trinkets, weapons, or gathering tools to give an added bonus or effect when the item is utilized. They are an essential elemen