I know you can't get it from the eshop anymore, but if I get it from like hshop can I send my MHG save from my 3ds to MHGU on switch?
Well, I ended up going down a long ways and thought I'd share for others trying to transfer their save now that the official app has been killed. I had to convert my...I'm fairly sure MHG -> MHGU conversions have been a part of the save editor for a while. I've just downloaded it and can see there's a Convert option on the menu bar, but it's blank for me since I don't have an MHG save to hand to test. Give it a go though:
The GitHub page mentions MHX to MHXX but the save editor was updated to be a MHXX and MHGU editor, so I'm imagining it was updated for the western releases.