Unlock Mount Blade In Pokemon Sapphirre Where Do I Get Boulder Move?

In pokemon sapphirre where do i get boulder move? - unlock mount blade

In pokemon sapphirre Where can I get the HM is the movement can move the stones? As to the point where I beat the gym 7 cards and the device mounting pile of water. I havent Sootopolis Ever Grande City and the city has not been enabled.