How to get Rock Climb HM
On your way to Snowpoint City, near the top of the route, veer to the left, and there will be a house. A guy inside will say he lost his HM in the snow. Exit the house, and go down a little bit, and to the right of the house the HM Rock Climb will be there in the snow. If you can't find it, use your Dowsing Machine on your Pokemon Watch and look for it with that. Remember, it's to the right of the house(on the route, mind you) and a bit down. I hope this helps!
More tricks, tips and cheats for this game are right here - Pokemon Platinum cheats
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