I spotted these two talking Rainbow Rocks Equestria Girls at Target while picking out my pirate fairies. There only seem to be these two in this set (at least, they're the only ones I could find evidence of.
These two dolls seem to have feet, unlike the previous waves of Eq. Girls. I couldn't really tell if their shoes would fit MH, though. Both dolls come with a band-based accessory. Drums for Pinkie, and a mic for Twilight.