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How to Upgrade Items in Pokemon GO The Upgrade is among the most important items in Pokemon GO. It gives trainers the opportunity to evolve Porygon2 into Porygon, and to advance in their Pokedex. It is a rare item, however it can be obtained by spinning a Photo Disk at a Pokestop, or as a prize at special occasions. But what exactly does this item actually do? Components Upgrade components are items that can be slotted into trinkets, weapons or gathering tools in order to give an attrib