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World of Warcraft Item Upgrade and Set Bonuses The item upgrade is a type of enchantment which increases the stats of certain weapons or armor. This includes secondary stats such as Leech or Speed. A special evolution item that allows Porygon to transform into Porygon2. It can be found in Pokestops and Gyms. can be applied to any kind of equipment and provide smaller bonuses than other components that are specific to the kind of equipment. Leveling The upgrade system allows players to enhance th