Pokemon GO Upgrade Items and Components
An upgrade item is an item upgrading that makes certain Pokemon develop. The upgrade can be obtained by spinning a PokeStop photo disc. It's often given as a prize at Pokemon GO events.
Upgrades can be applied to weapons, armors trinkets, weapons, and gathering tools in order to increase the level of their item. The upgrade costs Flightstones and crests, dependent on the kind of item.
Upgrade components
Upgrade components can be inserted into armor, weapons, trinkets, and gathering tools to offer attribute bonuses or additional effects while the equipment is being utilized. The item being upgraded must have an available upgrade slot to accommodate the component, and the majority of upgrade components require the item upgrades being upgraded to be at the specified level. Some upgrade items also have special effects when applied to an equipment piece.