I wish there was a way to get shiny Celebi legitimately. It's pink, so that in mind, you probably don't have a complete pink set. And then those shiny Mews are rarely ever legit. ~_~
I'm working on collecting foreign unnaned Braixen, but that's really it. I usually only go after shinies I really like as well, but that's quite a few haha. I have about...80 or so shinies in X now, I think. Maybe more, not totally sure. I still need to transfer some from Black before I lose my cloning capabilities. :( Waaaah.