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Pokemon GO Upgrade Items and Components A special item can be used to evolve certain Pokemon. The upgrade is obtained by spinning a photo disc. It's sometimes given as a prize at Pokemon GO events. Upgrades can be applied to weapons, armors trinkets, weapons, and gathering tools to boost their level. The upgrade costs Flightstones and crests, depending on the kind of item. Upgrade components Upgrade components can be inserted into trinkets, weapons, armors and gathering tools in order to provide attributes or other bonuses while using the equipment.