If you are talking about the rocks in Pinwheel Forest or Victory Road, these are only removed once you encounter Cobalion in its cave, on Route 6 (needs Surf).
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You can't. The only possible way you can get zekrom in Pokemon black is trading with somebody in pokmon white, in which you would need wireless communications, which some people don't have. hope this helps! :o)
if it is not breakable it cant be moved
you catch cobalion
If you're talking about the small, rugged rocks, then I don't think you can. The only rocks I know you CAN move/break are the huge boulders made for Strength.
You have to have the HM Strength in order to move the boulders around in Victory Road on Pokmon White. To get the HM Strength, go to Nimbassa City, and then go to the house(one all the way to the left) above the Pokemon Center, and talk to everyone in there, and one of them will give you the HM Strength. Hope I helped. :D