go to veilstone go to the house above the Pokemon center.make sure in your party there is a empty space.then talk to the man and he'll give you a ponygon.let it hold a up-grade then trdae with a friend of brother/sister. it will evole.if they have a dubiliuos disc and let it hold it then trade it will evole.when a Pokemon hold an item and trade to make it evole they will go away.but if u let a Pokemon hold a item but it wont evole it the item will be there. ponygon-ponygon-2-ponygon-Z
Link trade Porygone while it holds the Up-Grade
You need to trade polygon while it's holding the item "Up-Grade"obtained in the rocket warehouse on island 5 or 6.
Trade it to another game while holding the Up-Grade.
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.
The dubious disc is used to evolve PORYGON2 into PORYGON-Z a new version exclusive to Diamond/Pearl/Platinum. To evolve PORYGON2 make it hold the disc and trade to a friend then get them to trade PORYGON-Z back.
you give porygon the upgrade then trade it to get a porygon 2 then you give your porygon 2 another upgrade and trade yet again to get a porygon-z
To evolve Porygon to Porygon2, you will need to have it hold an Upgrade and trade it. You can get Porygon-Z by having Porygon hold a Dubious Disk and trade it.
you have to link trade porygon
you have to have a upgrade and then trade it
Just Evolve Porygon(1). And To Evolve Porygon(1),You Must Trade It.
trade while holding up grade and it will evolve into porygon 2
you have to get a porygon, then trade it with an upgrade, then you have to trade porygon2 with a dubious disc, which is found in the team galactic headquarters in veilstone city.
Have a Porygon hold it and trade it.When the other person gets it, it will evolve into a Porygon-2.
Give Porygon an upgrade to hold and then trade it. Also, if you want a Porygon-Z give Porygon2 a Dubious disc to hold and then trade it.
The Up-Grade Evolvs Porygon When You Give It To It And Trade. You Can Get Porygon From A Woman In Veilstone. When You Get A Porygon2 (If You Have It) Give It The Dubilous Disc And Trade Again And You Get Porygon Z. Hope I Helped :)
you give it to porygon and trade it and it evolves into porygon2
Trade it whilst its holding an Up-Grade