Many thanks!
Get this:
https://gbatemp.net/threads/questio...g-file-with-pointer-code.434481/#post-6535705
As described in the thread, put the plugin in sd:/plugin/home/dumper.plg
Create this folder on the sd card: sd:/dump
Load up NTR and then MHXX, and get into a quest.
Once in use X+Y to bring up the NTR menu, then select ProcessDumper2.0.
Select the process with "1971" in it; it should be the last entry. (Press A to select)
You will see a message in green saying dumping blah blah... Press A to move to the next screen.
At this point you'll see a memory layout on the screen, and you should press B.
It will begin dumping the entire memory (about 80MB) to your SD card (should take about 1~3 minutes, depending on how fast your card is)
Once it is done it will show a green "dump complete" message, and you can press B to get back to the game.
The dump file will be located in sd:/dump/########.bin. Upload this file somewhere and PM me the link as well as what quest you were in.
There are other ways to dump the game, such as using a debugger over wifi. I've tried this and found that it always crashes the game afterwards when you encounter the next load screen (switching maps, exiting the quest ...etc). With this method at least it's relatively stable; it still crashes after making about 12 dumps though.