You go to Mauville City and talk to the Rock Smash Guy.
HM06 Rock Smash
Granite cave use rock smash on rocks in the cave and he will come out. it is on dewford
You need to use the move Rock Smash which you get in Mauvile City.
im think you get it from using rock smash on those rocks in the tunnel around verdanturf town
use rock smash on the rugged rock and the guy will give it to you when you smash one of the rocks
Get the HM Rock Smash
The route to the north of Mauville City past the rock smash rocks and east of Lavaridge Town.
Go to Rusturf tunnel then use rock smash in either of the 2 rocks then the man(the one in the left of a rock) will talk to you and.....
i just used rock smash
a move in Pokemon to smash rocks so you can get past
you must HM rock smash.
Find a Pokemon that can learn Rock Smash. Like Geodude.