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World of Warcraft Item Upgrade and Set Bonuses The item upgrade is an enchantment that increases the stats of a specific armor or weapons. This includes tertiary statistics like Leech and Speed. A special evolution item that allows Porygon to transform into Porygon2. It can be found at Pokestops and Gyms. Universal upgrades can be applied to any type of equipment, and offer smaller bonuses compared to other components that are specific to the particular type of equipment. Leveling Upgrad