[Miasma]

I ran into a shiny Golbat on Iron Island on my second playthrough of Platinum, and so far it's the only shiny Pokémon I've ever encountered. I did manage to capture it, and evolve it into a rather cool looking Crobat that I used for awhile. I ended up trading it for a Shaymin later on though, and I don't have either of those Pokémon anymore, sad to say.