The password to unlock the Porygon-themed event for a C-Gear skin which will be a Porygon-Z C-Gear skin is PORYZCGEAR2012
There's no password to get a Porygon in Pokemon Black. You'll need to trade from Pokemon White.
IGNPORYGON
The password that you will need to enter in order to receive the Dream World Porygon with its Hidden ability is IGNPORYGON, it must be entered exactly as written but without the comma.
cgear > wireless > entralink
Once you get the cgear.
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
Yes, you can breed Porygon with Ditto to obtain a Porygon Egg.
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.