Nintendo Switch Mario Kart Deluxe 8 Online Mii?

It's about the following, my sis and I always play with their console on the television in online mode with others from all over the world. Unfortunately you can only play Mii as a guest and you always lose the points you have collected. But I would very much like to play with my real Mii, I also own the game and my own console and would like to know if it works at all, so that you can somehow play with your own Mii or game and your own console at my sister's, like that that I can then choose my main Mii with her in the game? ^^ Or whether somehow you have to make friends and then somehow you are connected and I can then choose my main Mii without my console or game with her?

No, don't think so. You could open your own room online, but there would only be those who have the key, so probably only you 2. Or you just play with computer-generated opponents. So just as you imagine it will not work. Of course, you could both log in at the same time until you happen to end up in the same lobby, then it should work and you may stay in there together, but then only one person can use the TV, unless there's still a TV or monitor. In any case, you usually need your 2 switches and have to operate them at the same time, but you could buy a HDMI splitter and switch between them. But costs a few €. This artificially divides the television into 2 or more equally sized parts.

so yes, it works somehow, but it still remains pretty fiddly!

Or you just need a key from a room that is already in use and where something is going on. But this is only about one of the problems. From 7 p.m. On there's a tournament: https://www.youtube.com/...tfd4AaABCQ if one is playing directly at the switch and the other is maybe on the tv, you can join in