you can only buy it from the game corner in the city with erika
You must evolve Porygon (From Celadon) using the UpGrade to Porygon 2.
you cannot evolve a porygon2 in leafgreen
It evolves porygon to porygon2
Porygon evolves while being traded while holding an Upgrade.
you can't. dubious disc is to evolve porygon 2 into porygon z, porygon z is a sinnoh Pokemon and leaf green only goes up to hoeen
You can not catch it in leafgreen,but in firered you can.
You need to trade a Porygon holding an Upgrade.You get an Upgrade from Silph Co building.
you trade it while holding an up-grade.
give it to a porygon and trade it to another person and it evolves into a porygon2
To get Porygon in Leaf Green you must have 6500 coins. Go to Game Corner in Celadon City and exchange your coins for a Porygon.
At the Pokemon mansion. You can talk to the owner and on rare occasions, he will say that a Porygon is in his backyard, so go there
You cannot catch Porygon2 in the wild, you will have to trade a Porygon holding an Up-grade to evolve it into Porygon2.