Excluding the red Gyarados and special event shinies like Giratina in Black 2 my first shiny, one I found myself in the wild, was a Pawniard in Y.
It was after I completed the game in Mar 2016. The only reason I knew it was shiny, as I didn't see the sparkle or hear the ding, was that I encountered some red ones right before it. I probably would have ran had it been a first encounter since I wasn't hugely familiar with gen 4 or 5 Pokemon.