yes you can. but if you have Pokemon soulsilver, the first encounter will be a lugia and vice versa for ho-oh.
If you want a Lugia egg, first get the actual one. Then get a Ditto and put the actual Lugia and the Ditto in the day care (located south of Goldenrod City). Wait for them to have an egg and you'll have a Lugia egg.
You get a Pokemon that's effective against Phychic or Flying. Personally, I wouldn't defeat Lugia...
Lugia learns Sky Attack at level 99.
Lugia doesn't learn psychic in Pokemon soul silver on his own. However, you can easily teach Lugia psychic if you have the move in your possession.
Ditto and Lugia do not breed. I tried it.
You don't, legendary Pokemon can't be hatched from and egg with the exception of manaphy and phione.
you can't. it's suppose to be a glitch if lugia and the unhatced egg is in your party and a shadow lugia shows up in the hall of fame after elite four.
Lugia is located in the whirl islands
No. Lugia for SoulSilver and Ho-oh for HeartGold. Yes, you just get them at different times. You get Ho-oh in Johto and Lugia in Kanto in HeartGold, and vise versa in SoulSilver.
On whirl island
yes you can. but if you have Pokemon soulsilver, the first encounter will be a lugia and vice versa for ho-oh.
If you mean Lugia following you, yes, it can.
Shadow Lugia is only available in XD.
Whirl Islands!
Yes.
LV 45