Yes, you can breed Porygon with Ditto to obtain a Porygon Egg.
An upgrade is the item you nedd Porygon to hold. Trade it, and it will evolve to Porygon-2. Afterwards, the Dubious Disc is used for evolving Porygon-2 to Porygon-Z in the same way.
Attach the Upgrade to a Porygon and trade it to another game. It will evolve into Porygon2 when it arrives in the other game.
First, you must trade it while holding an Upgrade to get Porygon 2. Then you must trade it again, but while holding a Dubious Disk, and voila! You have a Porygon Z!
Porygon. If Porygon is holding the Up-Grade, trade it to a friend and it will evolve into Porygon2. Give Porygon2 dubious disc, and it will evolve into PorygonZ. Porygon can be found in the Sinnoh region in the trophy garden, after gaining the National Dex, and in the Kanto Region, they can be found in the game corner prize exchange for the maximum amount of coins.
Catch pokemon, battle, almost all the same stuff as the other games.
Porygon 2 and porygon- z
there is porygon-2 but not porygon. porygon-2 is in oil field hideout
give it to porygon and trade to get porygon-2
Have a porygon hold upgrade then trade and boom its a porygon 2.
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
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.
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.
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.
An Up-Grade is an item that evolves the Pokemon Porygon when Porygon is traded while holding it. Porygon evolves into Porygon 2.
Porygon's level dosen't interfere with it's evolution, because Porygon does not evolve through Level Up. You need to trade a Porygon with another Pokemon game. Once the traded Porygon reaches the other game, it will evolve into Porygon-2.
Porygon-Z
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