Yup, unfortunately it seems they are no more. The rooted fancy dance party dolls seem to be the last of them being produced. Sucks, I really liked these and I've definitely bought up my share. I have multiples on Tris and Mel actually, but apparently they didn't do so well. My local stores barely carried them at all even TRU. Our Walmart got them but only a couple of boxes per release which meant once they were gone. They were gone.
In fact out of the 6 dance dolls that they actually got I ended up with 3. I bought one when I first saw them to give to my niece, not to keep, intending to go grab more for myself later, but then they just vanished off the shelf and I never saw any again, not even through Christmas. Somehow 3 then ended up on the clearance shelf and I bought two. Our local Targets gave up after the first set apparently.
Never got wave 2 or the dance dolls so far as I know though they did have a couple more of the wave 1 dolls at one point. Even then they never had but Tristen, Melrose, Gavin and Leigh. I had to order away to finally get a Bijou and I will have to order an Arizona (and pay through the nose) to get one of those to complete my set too.