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How to Upgrade Items in Pokemon GO The Upgrade is one the most important items in Pokemon GO. It gives trainers the opportunity to transform Porygon2 into Porygon and also progress in their Pokedex. This item is scarce, however it can be obtained by spinning a Photo Disk at a Pokestop, or as a prize during special events. But what exactly does this item actually do? Components Upgrade components are things that can be slotted into trin