PokéBase - Pokémon Q&A
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Due to Rock Smash being a TM in Gold/Silver, I'd say no. Rock Smash can still break rocks, but I'm pretty sure that none of the rocks that can be broken need to be broken in order to progress in the game.

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It is not needed to progress in the main storyline but obtaining it is recommended.

Source:https://gamefaqs.gamespot.com/boards/446340-pokemon-silver-version/62788306

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