How can you get in Sunyshore city sunder waterfall?

theoretically in order for a stripling who is playing the portable Nintendo DS game chip that has been legally titled "Pokemon Pearl/diamond/platinum ect." to enter that area of the game data titled...

go to top of mt. coronet capture dialga go to sunyshore man is gone

you have to beat the snowpoint gym and beat Cyrus on top of mt cornet

you have to have palkia or dialga, you can get palkia or dialga at spear pillar. But if you want mesprit dont use the master ball on palkia and dialga. this is only on diamond and pearl in platinum...

after you beat the pastoria gym an explosion will go off wake (gym leader) will come out he will go to great marsh then hill tell u stay put barry or whatever the name u gave him will say chase after...