>>52061982emunand is, essentially, a copy of your switch on your SD card. it's a snapshot of what your switch was like when it was created, and anything you add or change on it will not carry over to sysnand. the two dont interact with eachother at all.
>can the emunand w/pirated games go online to play with friends or nah?no, this will result in a ban. i think there's methods of playing online with others with hacked/banned switches but i've never done it myself so not too knowledgeable on that
basically, here's how to avoid a ban, put simply: disable all internet settings on emunand and never ever go online on it after you've done anything unscrupulous. also install the thing that stops the switch from trying to connect to nintendo servers, forget what it's called at the moment(if you do this you can technically connect to the internet but thats a whole other thing and not really recommended unless you know what you're doing). keep all piracy to emunand and keep sysnand squeaky clean. do this and you wont get banned