I love shiny Drifloon too - it's color scheme, especially at night, is one of the very best!
Well, I have
1. A Shiny (Random Encounter) Geodude
2. Event Shiny Raikou, Shiny Entei, and Shiny Suicune
3. A Shiny Drifloon
I really don't know what I'm going to hunt... I'll have to think about that...