If you get the 3ds in time that'd be great, I was planning on getting the shiny Yveltal's and Xerneas's on all four games anyway but there's no point in just letting most of them rot in the PC so I don't mind sharing if someone misses them. Also, when you do get the game there's this really cool function called wondertrade, people mostly give out weedles and that shit but on Wednesdays (or Wondertrade Wednesdays as they're called) you can potentially get some really awesome Pokemon if you're patient enough, I've gotten a few Zygarde's that way so it's worth a try, the easiest way would be to get x or y though.