How do you move a heavy boulder at mtmortar on Pokemon gold?

You can't move the boulders at Mt. Mortar in Pokemon Gold. They are purely environmental features and serve no gameplay purpose.

The only way to interact with the boulders is to throw Poké Balls at them, but this has no effect.

If you're trying to reach a specific area, perhaps there is another route you haven't discovered yet. If you can provide more context about what you're trying to do, I might be able to help you find a solution!