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.
They will simply gain Exp. You can't breed legendary pokemon.
Legendary Pokemon do not breed, so they cannot lay eggs. However, only one legendary can breed, which is Manaphy. If you breed it with a Ditto, you will get the uncommon Pokemon which is Phione.
i am pretty sure the answer is no there is not
Latios
Well, I guess you mean "Soul Silver", and the main legendary Pokemon is Lugia, Water/Flying-Type.
no it is legendary. but in Pokemon heart gold or soul silver you get a giratina or palkia or dialga egg by going with arceus to the alph ruins
Moltas: the fire legendary bird Pokemon the second strongest bird Pokemon
Yes
over 9000
Yes, Beldum can breed but it can only breed with Ditto.
Yes