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How to Upgrade Items in Pokemon GO Upgrade is among the most sought-after items of Pokemon GO. It gives trainers the opportunity to transform Porygon2 into Porygon and also advance in their Pokedex. While this item is quite rare, players can locate it by spinning the photo disc at a Pokestop, or as a reward for special events. But what does this item actually do? Components Upgrade components are things that can be put into weapons, trinkets, or gathering tools in order to