You don't, legendary Pokemon can't be hatched from and egg with the exception of manaphy and phione.
Ditto and Lugia do not breed. I tried it.
yes you can. but if you have Pokemon soulsilver, the first encounter will be a lugia and vice versa for ho-oh.
lugia
Yes.
Whirl Islands!
Lugia
pokemon piatunum lugia egg code
If you mean Lugia following you, yes, it can.
You can't unless you use gameshark
lugia
Lugia is the only one.
A person that has SoulSilver