no it cannot be breed.
no legendary pokemons can be bred except for one which is manaphy bred with ditto
which gives phione(a weaker legendary).
hope this helps.
Some legendary pokemon despite being legendary can be male or female. However they are still in the legendary egg group which contains pokemon that cannot breed.
even though some legendary pokemon have genders they still belong in the "undiscovered" egg group which means they cannot be bred however the only legendary pokemon that can be bred is manaphy once put in the day care with ditto there will be an egg and from that egg a phione will hatch no matter if its a stronger or a weaker legendary
for more info about the undiscovered egg group go here :
and for more info about egg groups and breeding go here :
It's alright if you already asked! You didn't get your answer, no need to apologize! :) And Landorous doesn't have an egg group, therefore, he cannot breed. Sorry. :( I wish they could, but that would ruin their value...