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World of Warcraft Item Upgrade The upgrade of the item was first introduced in Generation II. This upgrade enables Porygon2 to grow when traded while being held. It can be slotted into weapon gear, armor and trinkets to give an additional bonus effect or increase its value. However, most upgrade components require the item to be at a certain level before it can be slotted into. are a kind of item that can be used to upgrade items. They can be obtained by plastic and recycling containers and also from fulfilling missions. You can also earn them through the recycli