How do I get past the cave? (Plz help)

Ok, Mods PLZ let me just get an answer before you lock this. PLZ. It is impossible to get a point across in the stickied thread, and no ones cares about my posts. Thank you.

Ok, so I'm stuck at this cave part in the game (Diamond version btw). It's the cave that is after Jublife City. In front of the cave there is a boy standing, and he says "The cave is blocked by boulders, but a Pokemon would be able to break them I think..."  So I go into the cave, and I don't know how to break these darn boulders! I just keep runing into geodudes and zubats, but I don't know how to get through!

Please help me some! :( 

Ok, Mods PLZ let me just get an answer before you lock this. PLZ. It is impossible to get a point across in the stickied thread, and no ones cares about my posts. Thank you.

 

 

Ok, so I'm stuck at this cave part in the game (Diamond version btw). It's the cave that is after Jublife City. In front of the cave there is a boy standing, and he says "The cave is blocked by boulders, but a Pokemon would be able to break them I think..." So I go into the cave, and I don't know how to break these darn boulders! I just keep runing into geodudes and zubats, but I don't know how to get through!

 

Please help me some! :(

xxcommixx

It took me two seconds to find the answer on Google. Try that next time. And to answer your question, you need to teach one of your Pokemon HM Rock Smash. 

Ya, you're not supposed to go to that cave just yet.

First go east where the first gym is, on the way there is another cave btw...

Then teach one of your pkmn rock smash

You can check www.gamefaqs.com for guides or like Nickman suggested, just google it.