I don't. I just came across them. I do admit I have a soft spot for shiny Cacnea, so I wouldn't mind getting my hands on one. But there's about a 1 in 8,000 chance of bumping into a shiny. I'm not interested in shiny hunting.
No, no, that's what makes them so good. I was expecting them to just be pixelated DP sprites. Instead they were clearly the new Pokemon, but with Green's style of having them look slightly different than they're supposed to. Basically you did a good job at making them look bad. ..I hope that sounds like a compliment. >_>