Go to Nimbasa City's Pokemon Center entrance, then go to your right, five steps exactly, and then head up.
Once you've gone up there will be another street on your left, turn there and go to the final house right next to the water and light post.
In the house there will be two people sitting at a long table, and then a blue haired Ace Trainer sitting in the back. Go speak with him and he will give you the HM Strength
you get hm strength and hm defog after defeating two gym leader.Fantina(defog) Byron(strength).
With the HM move strength.
If you have beaten Mauville Gym and have gotten HM ROCK SMASH, go to RUSTURF TUNNEL and clear out the rocks. The digger will grant you HM STRENGTH.
HM STRENGTH HM STRENGTH
HM04 Strength is found in Nimbasa City in the top-left building.
you get hm strength and hm defog after defeating two gym leader.Fantina(defog) Byron(strength).
its hm
In a building north of the Pokemon Center in Nimbasa.
make one of your pokemon learn the hm strength
a guy in nimbasa city
With the HM move 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).
You can get the HM Strength at Nimbasa City. One of the buildings behind the Poke Center will have a man with blue hair and will talk to you about the HM Strength and will give you it.
If you have beaten Mauville Gym and have gotten HM ROCK SMASH, go to RUSTURF TUNNEL and clear out the rocks. The digger will grant you HM STRENGTH.
Somewhere on route 18
From a man in the building north west of the Pokemon Center in Nimbasa City.
Surf, cut, fly, strength, waterfall, and dive