you have to beat the trainers and the time in that place on seven island
Yes you can trade leafgreen version Pokemon to another leafgreen version.
To evolve Porygon when it holds the item 'upgrade' and it is traded over to another game. It will evolve into Porygon2.
get the upgrade in the rocket warehouse on Five Island and then trade to another GBA game and then it will evolve. (porygon can be bought at lv. 18 at celadon game corner, and must be holding upgrade to evolve.)
On Pokemon Pearl's title screen, if the Pokemon LeafGreen game is in the GBA slot, click on "Transfer From LeafGreen" and you can choose six Pokemon from LeafGreen to transfer to Pearl, but be careful-you can't trade them back.
Raise to level 20.
in the trainer tower . it is a reward.
you will find it on island 7 when you complete the battle tower
give it to a porygon and trade it to another person and it evolves into a porygon2
You can't unless you trade a Pokemon holding one from FR or RSE.
you have to beat the trainers and the time in that place on seven island
Porygon evolves while being traded while holding an Upgrade.
You must evolve Porygon (From Celadon) using the UpGrade to Porygon 2.
Yes you can trade leafgreen version Pokemon to another leafgreen version.
You need to trade a Porygon holding an Upgrade.You get an Upgrade from Silph Co building.
The point of the game is finding them yourself
Not in Pokemon leafgreen only in Pokemon Firered never ever in Pokemon leafgreen And in Pokemon firered it is rare in power plant not available in Pokemon leafgreen?