by using the hm strength
A Pokémon needs the HM move of Strength in order to move the big boulders. You can find the Strength HM in the Rusturf Tunnel.
Well you need to get the TM strength from somebody and beat the gym (I forget what one) and teach it to a Pokemon
There is no move called push.But if you mean strength the move that pushes boulders you need to smash the rocks in ventredurf tunnel to get strength to be able to push boulders with it beat the 4th gym (the fire one.).
You will need HM strength, which you can get in Rusturf Tunnel. To use it though you will need to beat Flannery in Lavaridge Town.
HM "Strength" is used to move boulders.
First, you have to get the HM strength, then teach it to and a Pokemon and you can move boulders.
You might move boulders off of the seafloor cavern into a ship in order to examine the boulders. Often, this is accomplished using buoys that float the boulders from the seafloor to the ship.
To move the boulders and clear a path. If there are two types of boulders in your version the boulders with cracks need to have rock smash used on them instead of strenght.
Strength
you can use it when there are light brown boulders blocking somthing
By using the HM Strength you can move boulder's
go to the tunnel next to lavaridge town and use the strenght hm to move the boulders and go south to find a poke ball with a fire stone