Alright, so after somewhere between 550 and 600 Super Repels (my poor wallet... looks like I'll be beating the crap out of a pair of geezers for a while), I managed to catch a total of 16 Shiny Chansey. I would've had one more, but the stupid thing woke up the turn my Parasect used False Swipe and used Double Slap, getting Poisoned from Effect Spore... >_<
I have too many to IV check manually right now, and I don't have an AR nor WiFi access, so I can't post what IVs I've gotten, but it seems like I have a few Calm ones with nice IVs. Of course, all of them also have Serene Grace...
Anyone have any suggestions for what to chain once I'm done massacreing a coupl'a old hags?