Topic: SBBU Version 6.0 is out, can it be removed?

I had a bunch of Replay Data featuring DLC characters I haven't bought yet. I have a download code for the Fighters Pass lying around in my home (I restrained from using it because I thought about giving it away to a friend) but when I went to look for it, the game got updated as I mistakenly left my Switch connected to the internet.

Is there a way to delete or remove this update? I'm sure there is but there is a lot of conflicting solutions and some technical difficulties associated with them so does anyone know of a safe and effective method of uninstalling a particular update/software patch?

For technical clarification, I own the physical cartridge for Ultimate and I use a microSD card for memory storage.

Sure there is....
Delete all the Smash data and you can use 1.0.0 offline forever

Once update there is no reversing it. You should contact Nintendo Support on this. This isn't something NL can help with.