you first you beat a gym leader then you get the hm strength and teach it to a Pokemon then you push some boulders
use strength
Don't worry, just go back to the higher levels and the boulders will be there for you to push down again.
Strength.
You have to use a HM called strengh.
You would have to push down the boulders into the holes.
http://www.serebii.net/platinum/tornworld.shtml
use strength
you follow the spirits of the lake and then push them in to the right hole
its a hm and its called strength
Don't worry, just go back to the higher levels and the boulders will be there for you to push down again.
Travel through and keep heading down and push the boulders in the holes that the legendary Pokemon are near.
Push them in a way so that you can go through, if your doing the tanoby key puzzle the last boulders you want to push is the bottom boulders.
You Cant But The side Boulders Like This ^ You Can Hop It
You use the TM strength and push it into the holes.
it enables you to get rid of boulders in your underground hideout
Strength.
just push all the boulders