Unfortunately, being the cruel person that I am, I kind of left them in my PC Box and never touched them again.
It's a shame though, the only fun part about legendaries nowadays is actually battling them. As far as that's concerned, it's quite exciting kinda, but once you actually obtain them, you wouldn't have any more use for them(unless you're a person that's into using legendaries to construct an in-game team of some sort), so you have to sadly dump them into your PC and let them rot forever.