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World of Warcraft Item Upgrade and Set Bonuses The item upgrade is a type of enchantment that improves the stats in certain armor or weapons. This includes secondary stats like Leech and Speed. A special item for evolution that allows Porygon to evolve into Porygon2. It can be found at Pokestops and Gyms. Universal upgrades can be applied to any type of equipment, and offer smaller bonuses when compared to other components that are specific to the type of equipment. Leveling Upgrades allow players to upg