After you beat Sabrina, the 6th gym leader in Saffron City, you can use Rock Smash.
The Thunder Badge
The fourth gym at Pokemon fire red is grass type gym
You cannot rebattle Gym Leaders.
fire
You beat Roxanne the first gym leader in Rustbordo City
You get the card key which lets you open the gym which is locked.
You get the card key which lets you open the gym which is locked.
The Thunder Badge
Beat the first gym leader: Roark.
no
it is in saffron
In his Gym in Cinnabar.
the thunder gym in in vermillion city
You have to beat the 2nd gym.
In the cinnibar island gym.
beat the gym leader
rocksmash isn't a HM, it's a TM. but i think you get it from a gym leader.