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How to Upgrade Items in Pokemon GO Upgrade is one of the most sought-after items of Pokemon GO. It gives trainers the opportunity to evolve Porygon2 into Porygon and also progress in their Pokedex. It is a rare item, but can be found by spinning a Photo Disc at a Pokestop, or as a prize at special events. But what exactly does this item actually do? Components Upgrade components are items that can be slotted into trinkets, weapons, or gathering tools to provide an attribute bonus or extra effect when the