So I actually found a shiny for the first time in years, and the first shiny found while actively looking for one, the other day: a shiny Whismur!
I finally got my Shiny Charm in Alpha Sapphire and I decided to test it out in horde encounters, and since I like the Whismur line and you pretty much know exactly what you're getting in Rusturf Tunnel, I decided to try there. Only took me an hour or two, to my surprise, given my past shiny luck. I'm a little disappointed because I recalled Loudred/Exploud being a cool gray/purple color, and it turns out that was only the case in 3rd gen, but I'm still pretty psyched just to have another shiny, that
isn't a Bellsprout...
I've also started SRing for a shiny Regirock, since it's one of my favorite Pokemon and my favorite legend, but I am (to no surprise) having more trouble with that one. Given that I don't get the 5 encounters at once I don't have that help anymore, plus of course it's just going to feel more tedious anyway. Hoping it pays off though, I've been at it for a few days now while I do tasks that require more attention so that it's not too boring to be resetting again and again.