he isn't blocking the doorway to Dialga. you have to battle your way to the seventh floor, the Spear Pillar, and there will be a battle with the Team Galactic boss, followed by the professor's arrival, and then you will battle Dialga
you need to capture/kill palkia/dialga at mt cornet and go to team galactic base in veilstone city
to get past the guy blocking the way to sunyshore. you go to mt.cornet and you surf across the water and use rock climb.then there is a cave that go threw. and then theres place that's snowing.
You have to go to Spear Pillar and do stuff there, everything will be explained on what to do once you are there
get the HM Defog
You cant get palkia in diamond if you play diamond and you trade you STILL cant get palkia only in pearl you can get palkia
you cannot get past him yet. the spear pillar is at a different area. you can go past him when you have caught dialga/palkia
you kiss him with palkia
get through mt coronet after you beat cyrus in team galactic vielstone go to spear pillar and rowan and dawn are there. talk to them and they say stuff about palkia then in front of you will be palkia!
battle palkia/ dialga
beat snowpoint city gym then get palkia if you have Pokemon pearl or go and get dialga if you have Pokemon dimond then try again then you should be able to get there.
If you're talking about the guy blocking the path to Sunyshore city in diamond and pearl, you have to defeat Team Galactica at the top of the mountain, beat palkia, etc. After that the guy is gone.
Battle Dialga or Palkia at Spear Pillar and the guy blocking the road will leave.
In which game?
simple.......... just catch or defeat palkia than hell be gone
You must go to the cave where you capture either dialga or palkia, get them(optional), and then the guy will let you through.
PALKIA :go up to palkia and save then press A and battle it (use ultra balls u r gonna need 'em) as for the grunt I don't have a clue what ur talking about
No you cant