level up
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.
you evolve a porygon by trading it. then you get porygon 2. then you evolve porygon 2 by trading. then you get porygon-z. P.S. if you still want your porygon 2/Z trade back. P.S.S.to make sure you get it back trade with your brother,sister,friend ECT.
Porygon 2 and porygon- z
You have to have the up-grade then trade it to evolve into Porygon-2 and then a dubilicius disc for Porygon-2 to evolve into Porygon-Z
Porygon can evolve into Porygon 2, while holding an Upgrade and traded. Even further, Porygon 2 can evolve into Porygon Z, while holding a Dubious Disc and traded.
If you mean how do you evolve Porygon into Porygon 2, you give it the Up-Grade item and then trade it. But if you actually mean evolve Porygon 2, you can't; Porygon Z wasn't introduced until Generation IV.
Porygon does not evolve at a set level. There are 2 discs you can find in the game, make your Porygon hold the right one during trade and he will evolve into a Porygon2. After that give your Porygon 2 the other disc and trade it and it will evolve into a Porygon-Z. I wish I could tell you the name of the discs, but I forgot what they are called.
if you give it to a porygon 2 and then trade it it will evolve into a porygon z to get a porygon 2 you must give a upgrade to a porygon and then trade it and it shall evolve!
Porygon doesn't evolve at a level. You need a special item to make it evolve.
it does not evolv by lvl. use "upgrade" to evolv into porygon 2 and "dubious disk" to evolve into porygon z
To evolve it into a Porygon2, trade Porygon holding an Up-Grade. To evolve Porygon 2 into Porygon-Z, trade Porygon2 holding a dubious disc
porygon 2 doesn't evolve with a level but it evolves when u trade it with an up grade