You cannot have a legendary egg. Legendary Pokemon cannot breed. The only way to get one is to cheat.
You can never get an legendary egg without a ditto. And then it might not work.
No legendary can lay an egg except for manaphy which gives an egg to phione and you can not get manaphy or phione in heartgold
it is impossible to get an egg of a legendary Pokemon exept for Manaphy and Phione without AR codes, GS codes or codebreaker codes.
put shaymin in daycare with a ditto and they will make an egg, but u will have to wait a long time for the egg cause shaymin is legendary
you can but you have to have a female legendary and a male legendary
no:(
It is absolutely impossible to get Legendary Pokemon eggs.
Glitch for it! On Google type in: Tweaking glitch for Pokemon Platinum. find out how to do it and then Type in: How to get darkrai using the tweaking glitch on platinum.
No. Legendary Pokemon can't have eggs at all
No legendary Pokemon in history can breed. GENDER OR NOT!
No. It is a legendary with no egg group.
There are no such things as legendary eggs.