I believe it is the gym in Sunnyshore city, or something like that.
Actually it is Veilstone :)
go to the in game menu and go to Pokemon click on the Pokemon with fly and chose fly
The 3rd gyms badge will grant you the ability to use Fly outside of battle, the 3rd gym is in vermilion city.
none!
You get Fly after you beat the 5th Gym Leader (Chuck). Chuck's wife will be outside the Gym, and if you talk to her, you will get Fly.
After you beat Leader Chuck at the Cianwood Gym, step outside and his wife will give you the HM Fly
you beat the 3rd gym leader and and find dawn outside .,then you go around the city and to the battle the galactic grunts and it is in the mini house where the grunts run in to if the win the easy battle .
go to the in game menu and go to Pokemon click on the Pokemon with fly and chose fly
Fly to the Fight Area on a weekend or Defeat the Elite Four 10 times and fly to Fight Area
The 3rd gyms badge will grant you the ability to use Fly outside of battle, the 3rd gym is in vermilion city.
First you must beat the Elite Four and then you fly to Snowpoint city and if you walk down to the bottom you will find a sailor who will bring you to the Fight Area!
after you beat the 5 gym you have to go to route 6 and battle bianca after you beat her she will give you fly
You get it in the island where you battle that fighting pokemon leader, his wife outside of the gym will give it to you after you beat gym leader and speak to her
When you beat the elite 4 and Cynthia you fly to Snowpoint City and hop on the sailors boat.he takes you to the battle frontier where you can catch Pokemon from different regions.
none!
First teach Fly to one of your Pokemon then fly to Snowpoint City. Talk to the sailor; he will take you to the next island. Once you arrive, battle your way to the survival area then into Stark Mountain.
in jhoto, you have to beat chuck (the 5th gym leader) and then talk to the person outside the gym (a girl). chuck will give you the ability to use fly out of battle and the person will give you the HM.
With good Fire of Fly Pokemon!