Go to Mauville City and go inside the house to the right of the Pokemart then talk to the guy inside he will give you the HM Rock Smash.
in mauville city there is a man in a house that looks like some sort of scientist talk to him and he will give you the hm for rock smash
At Ambrette Town there's a girl near the aquarium that will give it to you if you talk to her.
How to go to verdanturf town in omega ruby
Get the HM Rock Smash
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at a town
No, it cannot learn Rock Smash.
in a house in mauville city
You get Rock Smash in Mauville City. Talk to the guy in the house to the right of the Pokemart.
you can find the legendary Pokemon regirock
Talk to a guy in one of the cities
go to the granite cave and have a pokemon with the move rock smash then go to a stone you can smash with rock smash smash it and nosepass may appear
When you come into mauvill city from the soulth there will be a house to your left.The man inside will give you rock smash.
From the secound house you see in Mauville City.
Beat the 3rd Gym, and Get HM 06 Rock Smash