To Evolve Porygon2 you need the Dubious disc found in route 225
Give the D Disc To Porygon2 and Trade it to a friend and get it back or put it in the Deposit Box In the GTA for... (Legendary) Level 9 and Under, Then take it back.
It will Evolve into PorygonX
It evolves porygon2 (trade)
It evolves Porygon to Porygon2 when traded.
Not one hundered percent sure but i think its the one that evolves porygon in porygon2 OR its the item that evolves porygon2 into porygon-Z
you give it to porygon and trade it and it evolves into porygon2
Porygon2 evolves with trading, while holding a Dubious Disc. This item can be found in Route 225 and the Team Galactic HQ in Veilstone City.
Porygon2 evolves by trading with a Dibious Disc
The only known Pokemon to evolve using the up-grade is porygon. It will evolve it into porygon2.
The Up-Grade evolves Porygon into Porygon2 through link trade. Then Dubious Disk evolves Porygon2 into Porygon-Z.
It evolves Porygon to Porygon2 through trade.Dubious disc will then change Porygon2 to PorygonZ
it evolves porygon to porygon2 when traded.
Porygon evolves into Porygon2, I think you have to trade it while it is holding it.
There is no certain level, porygon evolves when it is traded and is holding upgrade.