To get Porygon 2, you need the item 'Up-grade'. You attach the item to the unevolved Porygon and then trade it. Hope this helps!
Never
Level 16+
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
by a fire stone
by a fire stone
level 21
Pikachu and evee are two.
Have a porygon hold upgrade then trade and boom its a porygon 2.
Yes, you can breed Porygon with Ditto to obtain a Porygon Egg.
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