No, it's not a lie, and yes, you read it right! There is a way to breed Legendaries!
First, get a shiny Ditto. If you obtain this by cheating, it will not work. Remember, the game can tell. Put it in the day care w/ your Legendary. The resulting egg will take the number of steps listed in the Psydex to hatch, and will be Lv 5, like normal.
Good luck catching your shiny