lugia, ho-oh, rakiou, entie, suicune, celebi , groudon,kyoger,mew,mewtwo,arceus,zapdos,moltres,articuno and, raquayza
7 10 if you trade
Moltres is the only legendary Pokemon in Mt. Silver for HeartGold / SoulSilver only.
7 "legendary" Pokemon
The Legendary is Lugia it can be found in whirl islands
Moltas: the fire legendary bird Pokemon the second strongest bird Pokemon
moltress
the only legendary that you can breed is manaphy. and that will result in a phione.
You can't breed legendary Pokemon eggs on Pokemon SoulSilver or on any Pokemon game.
Latios
no.
They will simply gain Exp. You can't breed legendary pokemon.
It might depend on the Pokemon, though usually you can face legendary Pokemon again if you beat the Champion.
Well, I guess you mean "Soul Silver", and the main legendary Pokemon is Lugia, Water/Flying-Type.