Pokemon Diamond- how do you smash boulders?

Question

I'm at a bit with brown rugged boulders and it says one of my pokemon could smash them. But how do I get my pokemon out and tell it to do that?

Answer 1

use your pokemon with a skill named 'strength', if you don't have one,, u can't smash it..... u must use a disk to teach a pokemon the skill nmed "strength"

Answer 2

smack the pokemon in the head