>>18914744There's an anime episode with a Lugia and its baby.
Legendaries breed, just very slowly over hundreds of years and not with your shitty Ditto. They might also be genderless, or reproduce asexually.
And don't say "durr hurr thats teh anime its wrong aim for da horn", it's the only explanation for why there are clearly more than one of each legendary in the game with the exception of Arceus creating a Dialga/Palkia/Giratina