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World of Warcraft Item Upgrade The was first introduced in Generation II. This item is a special one that allows Porygon to evolve into Porygon2 if traded while being held. It can be slotted into weapon gear, armor and trinkets in order to provide an extra effect or boost its attribute value. However, most upgrade components require that the item be at an appropriate level before it can be slotted. Recycle points Recycle