after you get surf, surf down from olivine city and you will find them, but you will need whirlpool to enter, and you have to defeat a specific gym leader i think it is the 7th one in mahogany town
No, there are no underwater routes in Pokemon HeartGold or SoulSilver. The HM Dive is not available in Pokemon HeartGold or SoulSilver.
yes you can
You'll need to use the Super Rod for all of them, except Cliff Cave. Cherrygrove City, Cianwood City, Olivine City, Route 19, Route 34, Route 40, Seafoam Islands, Union Cave, and Whirl Islands.
You'll need to trade for it from Pokemon HeartGold. It is not avilable in the wild in Pokemon SoulSilver.
you can´t
you dont
Seafoam Islands.
Whirl Islands!
lugia
Whirl islands
seafoam islands. surf from cinnibar
seafaom islands up the ladder
whirl islands
Articuno is located in Seafoam Islands.
Ice Path or in Seafoam Islands.
Articuno should be in the Seafoam Islands.
if this is the swirl islands . . <-- . . go to this one