you can make porygon hold it then you trade it and it turns into a porygon-2
yes
If you give it to porygon and trade it, porygon will evolve
Pokemon Tower. Why?You have to beat the Trainers Tower and the guy on the roof top will give you Upgrade.
If held by Porygon during a trade it can become Porygon-2.
This item can be found in the game it can be used to evolve a Porygon to Porygon2 by trading it to someone.
Have it hold upgrade trade it to a friend then take it back to receive porygon2.
In order to evolve Porygon into Porygon2, you must give it the Upgrade item and then trade it to another game.
In Pokemon firered you can't, but in Pokemon leafgreen you can get it then trade it to Pokemon firered.
There is no Pokemon convention in firered.
To get Pokemon firered on PC download a vba and Pokemon firered ROM
Yes there are shiny Pokemon in firered
You cannot get it in Pokemon FireRed. It doesn't matter because it is not necessary in Pokemon FireRed.