I live in the US and bought the platinum version from yesasia.com, I will be buying the english one when it comes out in march or so, and I don't know what you mean about the pokedex and no it didn't mee up my pokedex and I know nothing about iv's or even how to check them.
I got the jap darkrai event on my game on dec.1 but am SR'ing for a shint one, it's been 6 days with no luck!!