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How to Upgrade Items in Pokemon GO The Upgrade is one the most valuable items in Pokemon GO. It gives trainers the opportunity to transform Porygon2 into Porygon and progress in their Pokedex. This item is rare but it is available by spinning a Photo Disc at a Pokestop or as a prize for special occasions. What does this item do? Components Upgrade components can be added to weapons, trinkets or gathering tools in order to give them an additional benefit. They are a vital element in crafting and can b