Porygon does not evolve by training it levels. You must trade with an Up-Grade attached.
you trade it while holding an up-grade.
Porygon evolves when being traded while holding an Up-Grade
porygon does not evolve using levels, instead you have to trade it while holding the item up-grade you capture porygon at level 18-20.
if you get a Pokemon that is higher than it's evolved level, say, a level 65 dragonair that evolves at level 55 (true) and you catch it in the wild. just level it up one and it will evolve.
the obtainence of porygon is lv25
Porygon doesn't evolve at a level. You need a special item to make it evolve.
Porygon's level dosen't interfere with it's evolution, because Porygon does not evolve through Level Up. You need to trade a Porygon with another Pokemon game. Once the traded Porygon reaches the other game, it will evolve into Porygon-2.
trade while holding up grade and it will evolve into porygon 2
For Porygon to evolve you have to trade it whilst it is holding an 'upgrade'. See related links for more info.
Porygon does not evolve at a given level: you have to trade it while it is holding the Up-Grade to evolve into Porygon2. Then trade that while holding the Dubious Disk to get a PorygonZ.
you trade it while holding an up-grade.
Porygon? It doesn't evolve at a level. You need to trade with a certain item attached to Porygon.
Porygon-Z does not evolve any further.
porygon 2 doesn't evolve with a level but it evolves when u trade it with an up grade
No, it can't evolve by level. ;(
Porygon2 is a 2nd gen pokemon and does not appear in Pokemon Red. That aside, both of Porygon's evolutions occur when you trade it while it holds certain item. Up-Grade for Porygon to Porygon2, and Dubious Disc for Porygon2 to Porygon-Z.
Porygon evolves when being traded while holding an Up-Grade