you jump and press F9.
The Pokemon rock in Pokemon diamond is required to use a Pokemons power. There are fire rocks, water rocks, wind rocks, and magic rocks. Do not snort the magic rocks though, they will surely mess you up.
A fight type
get the HM strength, and teach it to a Pokemon
they're in the grass, water, and in rocks and caves
you can. but only on some rocks.
Find a Pokemon that can learn Rock Smash. Like Geodude.
Try to solve the puzzle. The rocks around stop you, and you slide all the way to the other side of the room if there's no rocks in the way. And if you're in that cave in Snowpoint, you'll be a bit miffed if you don't have the three Regis on your team...
in snow point city next to the rocks
Trade a Skull fossil across from Pokemon Diamond. Them take it to the museum.
look near rocks or evolve geodude
by getting rock smash from oreburgh gym leader
route 207 across the bridge