Http://bulbapedia.bulbagarden.net/wiki/Porygon_%28Pok%C3%A9mon%29 It should help
How Do You Get Porygon In Pokemon Heart Gold (preferably Without The Game Corner) (no Action Replay) And How To Get LOTS Of Game Corner Coins?
Catch rayquaza first then go to proffesor oak with rayquaza in your party
