Give porygon an upgrade and trade it it evolve it. And of course you have to trade it back. Try this in Pokémon go!
If you give It to the pokemon porygon and trade it then it will evolve
The Pokemon that evolve using a thunderstone are: Pikachu into Raichu Eevee to get a Jolteon
You need to trade a Porygon holding an Upgrade. You get an Upgrade from Silph Co building.
if your talking about the item called upgrade than you can use it evolve porygon into porygon 2 when you link trade it.
porygon 2 evolves to porygon z i think, I'm not sure
You must evolve Porygon (From Celadon) using the UpGrade to Porygon 2.
the upgrade is used to evolve porygon into porygon-z
Give porygon an upgrade and trade it it evolve it. And of course you have to trade it back. Try this in Pokémon go!
you have to have a upgrade and then trade it
trade while holding the upgrade
If you give it to porygon and trade it, porygon will evolve
If you give It to the pokemon porygon and trade it then it will evolve
You get it from professor oak it allows one rare Pokemon to evolve. And the answer before this was the real life type of upgrade :P
Pikachu can evolve into a Raichu.
The Pokemon that evolve using a thunderstone are: Pikachu into Raichu Eevee to get a Jolteon
You need to trade a Porygon holding an Upgrade. You get an Upgrade from Silph Co building.