how do i get to the top of mt. cortet to find team galacta in pokemon diamond?

Go to Hearthome city and go left and just follow the path, and make sure you have a pokemon with rock climb, rock smash, strength, and fly so you can get back to a city faster after you catch Dialga with your master ball. If you plan on catching it without a masterball bring lots and lots of ultra balls, it will take a while but it will eventually work i've done it.

You need to use Surf Strength Rock Climb Rock Smash and Defog to get there.But you must go in to Mt.Cornut from Hearthome and you must Surf up.

Either go to serebi.net or try and find a tutorial on YouTube.

It always helps to get the Prima official guide though.

http://youtube.com/watch?v=_py7-Se5ih8

Go to that URL and once you have watched the whole thing, put its title into the search engine and add one to the part number, marriland helped me to get through pokemon.

action replay and walk any were or just have something that knows like all the Hm's like biddof