find porgon 1 and catch it then in the closest bit of grass you will see porgon 2
i think you see it on a route near snowpoint city its covered with snow
An Up-Grade is an item that evolves the Pokemon Porygon when Porygon is traded while holding it. Porygon evolves into Porygon 2.
you must trad a porygon holding an up-grade
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
trade while holding up grade and it will evolve into porygon 2
In Pokemon Platinum, Porygon-2 can evolve into Porygon-Z using the Up-Grade. I do not believe it serves any other purposes.
In Pokemon Platinum (I don't know about Diamond and Pearl), Porygon is located in a house directly behind the Pokemon Center. If you want to evolve into Porygon 2, trade it holding a Up-Grade, and if you want to evolve Porygon 2 into Porygon Z, trade it holding a Dubious Disk. I do not know where htese items are found. If you want to get Porygon the harder way, use Pokecheck.
one of the scientist in the galactic warehouse.
Have a Porygon hold it and trade it.When the other person gets it, it will evolve into a Porygon-2.
Link trade Porygone while it holds the Up-Grade
evolve porygon from veilstone city
there is porygon-2 but not porygon. porygon-2 is in oil field hideout