Yartch
Smash Cadet

Look at this picture of Smashville, we can see 5 characters here right? Note where they're standing.
Now look at every other picture of Smashville, I'll give a couple examples.

We can see 4/5 of the positions are still occupied, every one but Nook's original one. Also note the Giraffe thing is gone, and I'm guessing that was her car too. Now we've got someone else there.

And...

Giraffe thingy is back with her car now, but hey, still no sign of Nook, or anyone taking his spot.
From all the pics I looked at, it's all the same. No one's taking Nook's spot, we aren't seeing Nook anywhere else. They CAN change spots, and even in different backgrounds too.

That weird pink thing moved spots from the first pic in this post, and Rover is even in the rock background, then on KK's set later. Could this be some sort of reserved spot or something?