I got the second-chance Darkrai and the wifi Keldeo on all my games. I really didn't do much with them besides TM up my Darkrai and Keldeo on OR, and give all four of my Keldeos Secret Sword to swap them to their Resolute form. I didn't bother soft-resetting for good natures or IVs since I won't use these mythicals in any way, and I really didn't teach them many decent TMs, just moves that they could learn and that didn't thoroughly suck.
It's still rather rare that I manage to get event Pokémon at all; I've only been able to do it since moving into my own place last year, which has wifi. Needless to say, I'm taking full advantage of the system for as long as I can, until Pokémon games start coming out for future systems that I won't own because I can't afford them. Hopefully that won't happen for at least another decade, but technology advances so rapidly that I'm surprised the 3DS isn't completely obsolete by now.
"Blessed are the peacekeepers, champions of the just."
IGN: Alduin (X, OR), Lillith (Y, AS)
3DS FC: 0318-8048-1351
I have several HA Pokémon, shinies, and a handful of events for trade! Looking for anything to expand my collection! PM me if you're interested!