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Pokemon GO Upgrade Items and Components An upgrade item is an item that will make certain Pokemon evolve. The upgrade is obtained by spinning a PokeStop photo disc. It's often given as a prize during Pokemon GO events. Upgrades can be applied to weapons, armors, trinkets, and gathering tools in order to raise their item level. The upgrade cost Flightstones and crests, dependent on the item type. Upgrade components Upgrade components can be added to weapons, armors, trinkets and gathering tools in ord