you can use it when there are light brown boulders blocking somthing
Ok you must be really stupid because all you need is the TM strengh
Use HM04- Strength
HM04 is the strenght move
The HM04 Strength is found in emerald after the player uses Rock smash to open up the Rusturf Tunnel. A NPC called Wanda will give the HM to the player after the rocks are smashed.
You use an HM04 move called Strength. The HM04 strenght is found on Iron Island. Go to canalave city and get on the boat to Iron Island. When you get to the island there is a lady blocking a cave. Talk to her and she will give you the HM04 move Strength.
in the cave with big boulder
you remember that cave where you save mr.briney's bird? go there, use rock smash, and allow the karate kid to go through. He sees his lovely Wanda again, and he rewards you with the one and only HM04, strength.
HM04 In Heart Gold and Soul Silver is Rock Smash.
Actually, there are no Pokemon at all in The Scorched Slab. Just TM11. It is at the top and route 120, in the water. (Surf on the first pond on route 120 from Fortree.) All you need to get there is HM04 (Surf).
Pushing boulders is a feature that can only be done with HM04 Strength. HM04 is received after you find the Safari Warden's Gold Teeth in the Safari Zone. When you have the Gold Teeth, give it to the Safari Warden and he will reward you with HM04.
HM04 Strength, can be found in Nimbasa City, specifically from a man in the building northwest of the Pokémon Center
You'll need Pokemon who know HM03 (Surf), HM04 (Strength), HM05 (Flash), HM06 (Rock Smash) and HM07 (Waterfall) in order to fully explore Victory Road.