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How to Upgrade Items in Pokemon GO The Upgrade is one the most valuable items in Pokemon GO. It allows trainers to transform Porygon2 into Porygon and also improve their Pokedex. Although this item is rare, players can locate it by spinning a photo disc at a Pokestop or as a reward during some special events. What does this item actually do? Components Upgrade components can be added to weapons, trinkets or gathering tools to confer an additional benefit. They are an essential