I've sent you a private message, but at this point all we can do is dump those files, keep the system on, and you should send those 4 files to me so I can look at the internals of your two NAND dumps. Once I know a bit more about your NAND, we can (loosely) predict what will happen if you flash the NAND back onto the system. This might or might not brick you, but at this point I don't think we can try anything else: We have a potentially-valid/invalid 1.0.0U Demo dump, a (probably) valid 6.x NAND dump, and your Xorpads in case we need to do further testing. If you brick, you will need a hardmod, though, and I think we'll have to find you someone who can help you with that if it comes to that. (I certainly hope we don't have to do that, but as long as that 1.0.0 NAND dump is valid, I don't think we've lost anything permanently.)
That's true, although I am more concerned about the fact they updated their system to 6.x using Pokemon Y: If that 1.0.0U NAND dump is invalid, we may have lost some valuable information for good...