I have put a link for your question. Most legendaries are obtained after beating all 16 gyms and defeating red.
No it is not.
NO
no he isn't the legedary Pokemon in soulsilver are: lugia,entei,raiko and suicune otherwise no magmar is not a legendary.
Cheating is wrong!!!!!!!!!!
Lugia
What do you mean? All Pokemon could be caught, except legendary Pokemon if you don't have the right balls for it.
lugia
You can't breed legendary Pokemon eggs on Pokemon SoulSilver or on any Pokemon game.
on any legendary(just that it should be a strong or rare legendary)
yes you can
Moltres is the only legendary Pokemon in Mt. Silver for HeartGold / SoulSilver only.
Nothing happens after that. You just caught the three legendary roaming Pokemon in the Johto Region.