go past rock tunnel
The gym leaders in Kanto don't have any specific order so there is no "third" gym. It will make things alot easier for people to answer this kind of question if you specify which town the gym is in and not the number as there are alot of possibilities when you just say third. For example, you get to viridian defeat that gym and go to saffron (defeat that gym), then celadon, celadon would then be the third gym. You can also do these in a different order. Then there is also the possibility that you were counting them from the red, blue, yellow perspective and meant the gym in either viridian or cerulean. Please make a new question specifying the town this gym is in and I am sure you will get the answer you are looking for
defog is the third usable hm after you beat fantina, the hearthome gym leader.
You try and beat the 4 th gym
The third gym is in vermillion city. The Gym Leader is Sarge, and he uses electric-type Pokemon.
Veilstone city,the gym leader is a fighting type
The third Gym Leader is Lt. Surge and you can find him in Vermilion City.
Celadon City and complete the events at the game corner.
The grass on the route between Cerulean (2nd gym) and Bills house. So go up from Cerulean and walk in the grass. (I think)
The gym leaders in Kanto don't have any specific order so there is no "third" gym. It will make things alot easier for people to answer this kind of question if you specify which town the gym is in and not the number as there are alot of possibilities when you just say third. For example, you get to viridian defeat that gym and go to saffron (defeat that gym), then celadon, celadon would then be the third gym. You can also do these in a different order. Then there is also the possibility that you were counting them from the red, blue, yellow perspective and meant the gym in either viridian or cerulean. Please make a new question specifying the town this gym is in and I am sure you will get the answer you are looking for
you need to look in the trash cans. one of them might have a switch
The third gym leader is Whitney.
the hearthome city gym
She is not in that version
The third gym is in Hearthome city instead of Veilstone on Platinum.
defog is the third usable hm after you beat fantina, the hearthome gym leader.
Fantasia is the third gym leader in case you didn't already know that
Go east of Vermilion City until you find a cave, which should contain the Pokemon diglet. This Pokemon is a ground-type, which electric is useless against. With his Dig attack, it should be no problem winning in the third gym