Whirl Islands only exist in Gold, Silver, Crystal, HeartGold and SoulSilver.
You can get Horsea in Dark Cave or Whirl Islands. You'll need to Surf on water to get it.
On Whirl Islands.
go to whirl islands
First, travel to Olivine City. Then, surf Southwest of Olivine to get to a Whirlpool. Then, use a Pokemon with Whirlpool to go across the whirlpool to get into the Whirl Islands.
Lugia
To get mantine in crystal and gold surf around the whirl Islands
You can find Luigia at the Whirl Islands, you have to go quite deep.
I have gold and silver, which almost is the same as crystal (the same generation). In those games, whirl islands is east of Cianwood City. You can go on the pokegear and look at the map. If you surf east from Cianwood City there are a couple islands there. It is hard to find whirl islands, but as you land on an island, look on the map and see if you are on whirl islands. If your not, try more islands. It is not that hard, but dont forget to have a pokemon with you that knows whirlpool.
Whirl Islands only exist in Gold, Silver, Crystal, HeartGold and SoulSilver.
Once you have it, you can catch Lugia on Whirl Islands. It's the one at the bottom.
i think he's in the whirl islands
Whirl islands are in the johto region which is not in firered.
You can get Horsea in Dark Cave or Whirl Islands. You'll need to Surf on water to get it.
It's in one of the Whirl Islands. You will need Whirlpool, Surf, Waterfall, Strength and Flash.
In the whirl islands with the silver wing
In Pokemon Silver, LUGIA is found in the WHIRL ISLANDS at Lvl 40. In Pokemon SoulSilver, LUGIA is found in the WHIRL ISLANDS at Lvl 45. In Pokemon Gold, LUGIA is found in the WHIRL ISLANDS at Lvl 70. In Pokemon HeartGold, LUGIA is found in the WHIRL ISLANDS at Lvl 70.