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