You must have gained HM01 - Cut in the S.S. Anne and taught it to your pokemon. (After fighting Gary on the second floor, go up to the captain's cabin. He's seasick and puking. Rub his back and he'll give you Cut.)
Cut the tree blocking the path to the gym and go inside, where you'll face a few trainers who use Electric Pokemon. The gym leader has put electric locks on the door that leads to him, so you'll have to solve a puzzle. There are number of trash cans. Press "A" on every one of them until it says that you've found and flipped a switch. You need to flip two switches for the door to open, so you'll need to find the second switch. The second switch is always either above, beside, or below the first one. If you get it wrong, the switch will be reset, and you'll have to do everything over again.
When you do open the doors, you can get to the gym leader. Good luck!
The fourth gym at Pokemon fire red is grass type gym
The gym leader after Misty is Lt. Surge. He is the gym leader of Vermilion City, specializing in Electric-type Pokemon.
The Thunder Badge
The third gym leader in poekmon pearl is maylene, a fighting type gym leader.
After defeating Koga the fuchsia gym leader he gives you the TM Toxic
26
The third gym is in vermillion city. The Gym Leader is Sarge, and he uses electric-type Pokemon.
no
The Gym Leader that allows you to use the HM move Strength in Pokemon FireRed is Erika. Erika is the Gym Leader of Celadon City and is the 4th Gym Leader the player faces.
beat the gym leader
Giovanni
saffron city (psychic type gym leader)
there is no gym leader in lavender town
charizard
You have to beat the 2nd gym.
The 7th leader is Blaine. He uses fire pokemon.
You cannot be a gym leader yourself in any of the Pokemon games, so far.