From a man in the building north west of the Pokemon Center in Nimbasa City.
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.
you get hm strength and hm defog after defeating two gym leader.Fantina(defog) Byron(strength).
Correction: it is an HM, but it is in Nimbasa City. The house behind the Pokemon Center, a blue haired guy will give it to you.
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.
You get strength in Nimbasa City in the top left building.
I believe you need to have the HM Strength
HM STRENGTH HM STRENGTH
cut, fly, surf, strength, dive, waterfall
HM04 Strength is found in Nimbasa City in the top-left building.
In Olivine City, go to the Pokemon Center. Don't go in. Then, if you're there, go left, to the building next on the left. In there, are men.talk to the man sitting at the table. He will give you the Strength HM
The HM Strength. It can be found in Nimbasa City, in one of the houses close to the Pokemon Center. Talk to everyone, and you'll get HM Strength! Hope this helped! :)
HM 4