Have it hold upgrade and trade it to a friend take it back to receive porygon-Z
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.
trade porygon2 with the item dubious disk to evolve the the Pokemon porygon two then get it back
No, it must be traded while holding the Up-Grade item to evolve into Porygon2.
You cannot catch Porygon2 in the wild, you will have to trade a Porygon holding an Up-grade to evolve it into Porygon2.
Talk to Professor Oak in the Southwest of Eterna City after beating the Elite Four. He will give you the Up-Grade.Then, let PORYGON hold the Up-Grade and trade it to another person. It will evolve after trading. After this, trade it back to your own game.
Make porygon2 hold a dubious disk Then trade it in order to evolve
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.
No
Porygon2 doesn't evolve you need to trade it holding a dubious disk
Porygon2 does not evolve.
You evolve Porygon2 by giving it the Dubious Disc and then trading it to another player's game.
Porygon2 evolves by trading with a Dibious Disc
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.
If you make the Pokemon Porygon2 hold it then you trade Porygon2 while it's still holding it, it will evolve into Porygon-Z
Porygon2 will evolve into Porygon-Z once you trade it to another player while it's holdig a Dubious Disc.
To get a Porygon2 in Pokémon Platinum, go to Veilstone City and talk to a man in the house north of the Pokémon Center. There should be two houses; go into the house on the right and talk to the man. He will offer you a Porygon. Take it and make your Porygon hold a up-grade and trade it to evolve it into a Porygon2. Also, to make it evolve into a Porygon-Z, make a Porygon2 hold a Dubious Disk and trade it. NOTE: ITEMS WILL DISAPPEAR UPON TRADE.
To evolve your Porygon2 into a Porygon Z, you have to trade your Porygon2 to a friend while it is holding a Dubious Disk.