I caught fifteen Shiny Piplup during Community Day. I had some incredibly good luck and I evolved a couple of them into Empoleon. I also hatched a Shiny Scyther during Community Day, which was a pretty neat surprise. It is the third Shiny Scyther I've found, but I'm happy with that and it was a nice bonus during the event as well.
This morning, during breakfast, one of my accounts started GPS drifting. It suddenly stood in a faraway place with only a Turtwig and a Bulbasaur in sight. I tapped the Bulba, it turned out shiny! After feeding it a golden razz berry and a ultra ball curve it jumped out and fled! Then the GPS corrected itself and an Alola Ratata stood before me. I tapped it, another shiny. This one I did manage to catch.
I just hatched a Shiny Happiny this morning. I was hoping that I'd be able to hatch another Shiny Pokemon during the Valentine's Day event. This is much better luck than I had with the Sinnoh event where I hatched so many male Combee. I don't know when I'll walk with my Shiny Happiny in order to evolve it, but it was a really happy surprise to hatch it.