The Cutie Map and a subsequent episode · 4:59am Nov 28th, 2020
So, I just got done watching "The Cutie Map" and I am now a little more acquainted to who villain Starlight is. Anyways, in an episode after that one, Applebloom and the other CMCs are having nightmares about their cutie marks, and based on what we saw from AB's POV, it seemed as though "she" (what Luna said was only AB's fear) took away the cutie mark every time she got one she didn't like, or tried to fix things. The voice... SEEMED ODDLY FAMILIAR.
I think Starlight has the ability to insert herself into dreams and convince others that their cutie mark is a curse, therefore making Starlight more powerful than I think.
Of course, this is only a theory and you can go ahead and debunk me, but just because Luna said it was only AB's self-doubt doesn't cut it for me, especially when the voice on "her shadow" was extremely familiar...