Talk to the underground man after completing his tutorial and he'll tell you he'll let you move boulders if you capture a flag. go into the underground and get a friend to go on his version and use the DS wireless link. find you're friend's secret base and talk to his PC it'll ask you if you want to steal his flag. take it and go to you're base. Talk to your PC and it'll register. You can now have 12 items in your base and remove 4-5 boulders. Hope it helped you.
First, you have to get the HM strength, then teach it to and a Pokemon and you can move boulders.
Strength
Use the HM move Strength.
With the HM move strength.
How do you move boulders in Pokemon:LEAF GREEN - FIRE RED - YELLOWTo move boulders you have to learn a HIDDEN MOVE (HM)called STRENGTH.You get this HIDDEN MOVE (HM) by giving the Warden in Fushia City hisGold Teeth back.You can find his teeth in the Safari Zone, close to the Secret House.The Warden lives at the east-side of Fushia in a house with a pond behind it.
You need to steal the flag out of your friend's Secret Base underground, then go up to the PC.
YOU CAN USE ACTION REPLAY TO MOVE THE BOULDERS INSIDE YOUR BASE
you need to get flags from plauing with your friends underground. the flags will be in there base so if you find it take the flag and run
If you mean in the underground, take it back to your base and go to the computer, you will now have 1 flag and if you get more you can destroy the boulders in your base and add more items
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.
it enables you to get rid of boulders in your underground hideout
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 put away the boulders once you've stolen at least 1 flag to get the bronze flags. The more flags you steal, the more boulders you can put away.
By using the HM Strength you can move boulder's