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Pokemon GO Upgrade Items and Components A specific item can be used to evolve specific Pokemon. The Upgrade is made by spinning a PokeStop photo disc. It's sometimes given as a prize during Pokemon GO events. Upgrades can be applied to armors, weapons trinkets, weapons, and gathering tools in order to increase the level of their item. The upgrade costs Flightstones or crests based on the type of item. Upgrade components Upgrade components can be placed into armor, weapons, trinkets, and gathering tools to