You obtain it from a sailor that is located inside the pokemon center in Olivine City.
Give the warden his gold teeth.
you have to go to mt. mortar (east of ecruteak town) and a guy will jump out of the cave and will give you hm 04 strength
Unlike in Pokemon Gold, there is quite a different scenario to get the HM Strength. First, walk east of Ecruteak heading towards Mahogany, and you don't need surf. Eventually, a hiker will bump into you, apologize, and give you the HM Strength.
HM STRENGTH HM STRENGTH
get the gold teeth in the safari zone then give them to the warden he is in the house right to the Pokemon centre then you give him the gold teeth and he will give u strength!!!!
find the Wardens gold teeth in the safari zone and bring them to him
Find the Gold teeth in the safari zone. Go talk to the Warden (right of the Pokemon Center) and he will give you hm 04- strength.
you get hm strength from a hiker on route 42
Strength is an HM by the way, go to fuschia city go to the safari zone and find the gold teeth bring it to the warden who's house his next to the Pokemon center he will give you the HM Strength.
HM 4
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.
once you earn a certain amount of gym badges you will be able to teach a special move to your Pokemon( which will show up in HMS and tms part of bag).