So I've had a lot of crashing issues but they only happen if I try to use the blue screen filter.
N3DS XL, 11.6-E, Ultra Moon, NTR Selector on 3.6, latest stable Luma, B9S, etc. etc.
When I stopped trying to use the blue screen filter, cheats seemed to work fine.
I tried clearing my Ultra Moon plugin settings (since I had the to auto-save and auto-load) but that didn't help.
I don't think the crash logs have any sensitive information in them, at least to my knowledge, so I've uploaded them all in case those help. (I can't get the built-in uploader to work at all for some reason, so I've put them here:
https://www.dropbox.com/s/k8rh1to50e4cut9/um_arm11_dump.rar?dl=0)
Also, to those talking about regions, 3DS Pokemon games are meant to be the same for all regions to my knowledge (bar region-locking on the cartridges). Maybe there is something I'm not aware of though, such as different headers (and maybe different Title IDs).
Oh, and one last thing I just remembered, I often get some flickering, primarily on the touchscreen, when transitioning between areas or cutscenes, when using NTR. It seems to happen whether or not I use cheats (but I haven't tested it without the plugin actually installed). I haven't noticed it much since I changed to this plugin from the other that was posted elsewhere on GBAtemp on the weekend though, but I just thought I'd note it anyway.