2nd Generation Item Evolutions
With the 2nd Generation Update to Pokemon GO came a number of new items, none more important than the Special Evolutionary Items. These are items that are needed in part for many Pokemon to evolve, primarily 1st Generation Pokemon that have a 2nd Generation Evolution. (Pokemon Candies are also needed to evolve these Pokemon as well.) These items include none other than the Up Grade, Dragon Scale, King's Rock, Sun Stone and Metal Coat, and they allow Porygon to evolve into Porygon 2, Seadra to evolve into Kingdra, Slowpoke to evolve into Slowking, Poliwhirl to evolve into Politoed, Gloom to evolve into Bellossom, Sunkern to evolve into Sunflora, Scyther to evolve into Scizor, and Onix to evolve into Steelix, respectively.