JKSV VS sys-botbase

Installed JKSV saves manager on the hacked switch and backed up all of the saves on the switch. Make sure to save a copy of these game backups in case anything goes wrong. JKSV created folders for each of the games on the SD card.

on your switch install JKSV (if you haven't played the game and created any save files, do that first). use jksv to create a back up of the save files on your switch. this back up will then be overwritten by copying your save files from your PC to the location of the backup on your switch. plug your switch into your pc and transfer the save files from yuzu/ryujinx to the location of where the backup was created. the save files from yuzu/ryujinx will look the same as the jksv backup. copy your yuzu/ryujinx save ontop of t he backup files and replace when prompted. now that the backup has been overwitten with your yuzu/ryujinx save, go into jksv on your switch and load the backup. you will now have your yuzu/ryujinx saves on your switch.

You can do that with JKSV, but only if your Switch is hacked.

Assuming you have both of them homebrewed (PC/Linux program to convert Wii U <-> Switch BOTW saves) https://github.com/DeltaJordan/BotW-Save-Manager (Switch homebrew app for exporting/importing/backup game saves) https://github.com/J-D-K/JKSV Use JKSV to import the save into the game once you got the save converted and onto the sd card in your switch. I don’t know how to get the save from the Wii U though, that you’ll have to research.

JKSV is probably your best option

Must have a hacked switch to move with https://github.com/J-D-K/JKSV

This reentry guide section has steps for migrating, since it migrates your SX OS EmuNAND over if you have one and your SysNAND is completely unaffected by the change in CFW, I'd presume that moving saves would be unneeded, however if you want to be on the safer side, you can always back up your saves using JKSV or another save backup tool of your choice.

Since the Steam and Nintendo version(s) use the same file format(s) you could use this method: https://github.com/J-D-K/JKSV Which is a Steam appgamedata% cloud save content transfer method- and migrate it to your Nintendo Switch 's "slot 1" file save. (Not suggested)

Would not recommend doing that on your sysMMC, especially if you intend to go online again without having to factory-reset via TegraExplorer. If you want to edit saves, do it in a permanently-offline emuMMC (exosphere and dns.mitm) using a tool like JKSV, so that your sysMMC stays clean and can still be used online. Using edited/hacked saves online is a one-way ticket to Ban City.

It's certainly possible - maybe even probable. I've found this program you can run on hacked Switches to allow preprogrammed inputs. This is useful for Tool-Assisted Speedruns (TAS), which can press buttons faster than any human can. It's possible that the same technique could cause Animal Crossing to glitch out.

Well for a save editor that you can use in game you can always try using the sys-botbase ram edit function found in NHSE or you can use ACNHPoker both of these allow you to edit the save in game though they do require an external device to run the editor on.

You can also use sys-botbase if you're running custom firmware to do everything via software, and hook directly into the game with other repos using this module

All you really have to download onto your switch's SD card for ACNHSpawner is sys-botbase (https://github.com/olliz0r/sys-botbase/releases)