find the Warden's teeth in the Safari Zone and give them to the Warden in the house at the bottom of Fuschia City
Machop/Machoke/Machamp
charizard
Strength
Strength and Surf.
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.
raticate can learn both and can be found in many places or evolved from rattata
you use strength
To get the HM Strength in Pokemon Red you need to do a little side quest. This quest involves finding the Safari Zone Warden's missing Gold Teeth which can be found in Area 3 of the Safari Zone itself. After finding the Gold Teeth and bringing them back to the warden he will give you the HM for Strength.
in fire red you have to go to the safari zine and find golden teeth then in fushcia city there's this old guy and he will give strength to you
You need the rainbow badge which you get a celadon city Hm cut is needed.
There is one. Use Strength on a boulder to get the Rare Candy
let all you're Pokemon faint and you'll return to the last Pokemon center you used.