to get the legendary (lugia) you must go to the whirlpool islands and on one of the islands you will find lugia
Latios
Well, I guess you mean "Soul Silver", and the main legendary Pokemon is Lugia, Water/Flying-Type.
the only legendary that you can breed is manaphy. and that will result in a phione.
over 9000
Probably either Mewtwo or Rayquaza.
ranges from 40(legendary dogs) to 70(ho-oh for you, mewtwo, ect.)
you have to look in places where a legendary might live (example: Zapdos=power plant)
yes. but there very hard to find.
Well I have the game so once
yes you do in fact you need it to get most of the legendary pokemon.
Moltas: the fire legendary bird Pokemon the second strongest bird Pokemon
They will simply gain Exp. You can't breed legendary pokemon.