Porygon-Z is the final form of Porygon (and Porygon2). To evolve Porygon to Porygon2, trade it while it holds an Up-Grade item. To evolve Porygon2 to Porygon-Z, trade it while it holds a Dubious Disc item.
give it the dubious disc and trade it
give it a dubious disk and trade it
porygon evolves by trading it with a upgrade then trade with dubios disk. enjoy your porygonZ!
trade porygon2 with the item dubious disk to evolve the the Pokemon porygon two then get it back
Porygon does not evolve at a given level: you have to trade it while it is holding the Up-Grade to evolve into Porygon2. Then trade that while holding the Dubious Disk to get a PorygonZ.
You have to trade the Porygon 2 holding an item called "Dubious Disk" to a friend. It should evolve like any other trade-evolving Pokemon.
You cannot. Trade with UpGrade to get Porygon2. Trade Porygon2 with Dubious Disk to get PorygonZ, but you have to trade either way.
you have to trade it while its holding an up grade item
Give it to a Porygon and trade it. It will evolve into Porygon2.
It evolves Porygon into Porygonz.
Attatch it to Porygon2 and trade it- it evolves into PorygonZ
You can give the Upgrade to Porygon and then trade it to a friend to make Porygon evolve into Porygon2, in order to evolve Porygon2 then give a Dubious Disc to Porygon2 and then trade it to someone and it'll evolve into a Porygon-Z.