https://funsilo.date/wiki/14_C....ommon_Misconceptions
World of Warcraft Item Upgrade The upgrade to the item was first introduced in Generation II. This item allows Porygon to evolve into Porygon2 if traded while held. It can be slotted into weapon gear, armor and trinkets to add a bonus effect or boost its attribute value. The majority of upgrade items require the item be at a certain stage before it can be inserted. Recycle points Recycle points can be used to upgrade certain items. They can be earned from plastic and recycling containers and also from the completion