This is a pretty long shot, but I've tried everything so it's worth it.
I have a Xenoblade Chronicles 35 hour system save that got botched, possibly by emulating the game, since it starts loading but it never ends.
Btw, this is the Wii version, but I figured it must be similar to the 3DS.
This happened when I was getting started on the Makna Forest level, so I figured the emulator must not like that level.
I tried this advice
Try editing the data at 0xB264 and 0xB288, these are not endian-flipped unlike most values in the 3DS save. changing this from e.g. 0101 (0x30313031) -> 0801 (0x30383031) would put you in Bionis' Left Shoulder, buuuut I also really doubt they forgot to strip the unused maps while porting. Maybe try epilogue Colony 9 (0102) first.
But whenever I changed that, the game tells me the save game is corrupted.
I've tried saving next to the entrace to an area, leaving to a new area and then saving again, then diffing the saves to see what changes around that offset, but I'm always getting the save corrupted message.
Can anyone let me know what else I need to change?
Thanks a mil!