You have to activate it first, then walk into a round boulder. You will automatically push it one space forward. The ability remains until you leave whatever cavern/room you are in, and you will have to reactivate the hm.
To activate, walk up to a round boulder and press "A". If you have a Pokemon with strength in your party, you will be able to activate it more easily.
HM STRENGTH HM STRENGTH
you get hm strength from a hiker on route 42
you get hm strength and hm defog after defeating two gym leader.Fantina(defog) Byron(strength).
HM 4
HM 4 Strength can be obtained from one of the houses in Nimbasa.
if coming from west you need the hm strength. if coming from east you need the hm strength.
To get HM strength you need to go to the lost tower in solaceon town and get to the top, when you get there, there will be 2 woman one of them has HM strength.
HM 06 strength
By using the HM Strength.
All the HMs in Pokemon D/P and even Platinum are below: HM: Where to find: Cut : From Cynthia when she comes to Eterna Fly : Galactic Warehouse in Veilstone Surf : From Celestic Town Elder Defog : From man in Pastoria Marsh Rock Smash : Mountain Man at Oreburgh Gate Waterfall : Jasmine on Sunyshore Beach Rock Climb : Route 217 (near Snowpoint)
You can get it in the place.
yes