Dragon Quest XI S uses a Unreal Engine serialized and encrypted savegame, same as SAO:Fatal Bullet, it's nearly impossible to write a Save Editor for a format like that, without having the source code.
No matter if it's an RPG or not, serialized file format are the hardest possible formats to crack.
About Link's Awakening, i finished 100% of the main game (without the new dungeon feature) in less then a few hours yesterday, what i want to say is, waiting for a save editor will take longer then just playing the game.
The bad thing about the VM that depending on your machine it doesn't work right. For example pcs with USB 3.0 there is no point in using a VM for this purpose, as the USB 3.0 drive does not recognize an old driver.