No, it would not work. Allow me to point out some flaws in this idea, despite how much I’d like it to work.
First of all, the save file isn’t saved on the cartridge itself, or the SD card directly. It’s saved directly onto the Nintendo Switch’s console system memory, and it is automatically backed up to the Nintendo cloud (Source). You’d have to access the data directly somehow, Nintendo has been very precise in making sure that doesn’t and can’t happen. As far as I’m aware, you can’t easily access or modify system files without hacking the console.
Hypothetically, if you were able to access the save data and input it onto an SD card to transfer over to a laptop and copy, I’m pretty sure they’d notice some “illegal” activity and ban the Nintendo Online account, thus preventing you from accessing the cloud and locking you out of Nintendo Features. They’ve banned people over hacked Pokemon before; I’m positive they wouldn’t tolerate someone accessing data they shouldn’t have access to and copying it.
In conclusion, there probably is a way, this this isn’t the way to do it, and it most certainly isn’t worth it.
