https://stanley-vazquez.blogbr....ight.net/the-ultimat
https://squareblogs.net/iranma....rket45/why-item-upgr
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 is sometimes offered as a prize during Pokemon GO events. Upgrades can be used on armors, weapons trinkets, weapons, as well as gathering tools in order to increase the level of their item. The upgrade cost Flightstones and crests, based on the type