* To defeat certain types of Pokémon. Rock Smash is a Fighting-type move, which is super effective against Rock-type Pokémon and Normal-type Pokémon. This can make it a useful move to have in your arsenal, especially if you're facing a lot of these types of Pokémon.
* To learn other moves. Rock Smash can be used to learn other moves through TMs. This can be a great way to expand your Pokémon's move pool and give them more options in battle.
* To increase your team's power. Rock Smash can be used to increase your team's power in a variety of ways. By breaking boulders, you can access new areas and find hidden items that can help you strengthen your Pokémon. By defeating certain types of Pokémon, you can earn experience points and level up your Pokémon. And by learning other moves, you can give your Pokémon more options in battle.