Sorry, but I don't think theres 'foggy island' in pokemon heart gold. I beat the game, and I have not heard of 'foggy island'. But, I did not get rayquaza, and as soon as I get a groudon, I will go to get it A.S.A.P. Then, maybe, it will unlock 'foggy island'. But as far as I know, there is no such thing. Sorry dude. :(
There is no such place as Foggy Valley in Pokemon Heartgold or Soulsilver, therefore you cannot get to these places.
If you complete the national pokedex, go to visit Prof. Oak and he will give you a ticket to a place called foggy valley. You have to get a ticket because it is also an island.
I caught it in Seafoam Island. (:
in the seafosam island at the bottom
to find Blue in HeartGold or SoulSilver go to Cinabar Island next to Seafoam Island and go right next to the Pokemon center.
No, Cinnabar Island never gets rebuilt in Pokémon HeartGold.
surf in the front of the island
You have to use rockclimb
it is in a cave beside island 1
TM13 is found on Seafoam Island.
in the seafoam islands in kantobottom of seafoam island
oh well its at the island were u get grudon