Strength is given to you by the Safari Warden in Fuchsia City, but he won't give it to you until you find his Gold Teeth. He left them in the Safari Zone in Area 3 right by the Secret House. When you go into the safari zone and find the Gold Teeth, you exit the safari and go down to the warden's home. The house will be in the bottom right corner with the mailbox. Give him his teeth, and he will give you strength in return.
You can use the move strength in Pokémon to move boulders. You can use strength in FireRed after getting the rainbow badge.
rocksmash strength and surf
You need to learn the HM strength.
Use the HM move Strength.
use strength or cut that's my opinion
you go up to a rock and you press A. brilliant
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.
You get it in island six's Ruin Valley. You must use strength to get it.
use strength find wardens teeth in safari zone
Get strength by finding the wardens teeth in the safari zone and he will give it to you.
you need to get the gold teeth, which is in the Safari Zone in area 3. After you get the teeth, take it to the warden, which is to the right of the Pokemon center. Give it to him and he will give you HM04, "strength."
To earn strength in Pokemon Fire Red it is said that one must find the Warden's Lost Gold Teeth in the Safari Zone. This area should not be skipped or you'll miss out on the strength.