Diamond and Pearl help

[BlazingPhoenix]

I'm stuck in Mt. Coronet. There's this galactic grunt that's blocking my way and he says "I'm hopelessly lost! Please don't pay attention to a lowly grunt without any Pokemon!"
I have no idea what to do, I rescued the three legendaries from the Galactic HQ and I beat the 7th gym leader. Help?

 

[ninja]

www.gamefaqs.com Take a ride on the Faqs trian.
That link leads to the best place ,for videogame help.

 

[Chaos Knux]

^What he said^

 

[Chimera]

I think you're supposed to go out from the East Side... PS, The new game out now is Pokemon Mystery Dungeon: Explorers of Time/Darkness.

EDIT: I ment in. Sorry ^^'