An alternate dimension where Panny finds a little doll during one of her wanderings, which she dubs Cupcake. She treated Cupcake as though she were real, giving her food and playing with her, talking to her about her worries and hopes, napping with her and taking her to school in her backpack. She was always careful with Cuppy, and took care of her, stitching her up when she got "injured" and making her tiny raincoats and scarves and boots, and eventually, tiny armor made of cardboard and imagination.



One day, when Pandora was a teenager and feeling especially blue about the lack of ponies who appreciated her, for her, rather than simply respecting her for her title or fearing her for her magic, she went on a huge rant and finally ended up sobbing her heart out, clutching her little Cupcake tightly. And then, Cupcake spoke, looking straight up at Panny and telling her that she wasn't alone, she had Cuppy, and she would never stop loving her or being her friend.



Whether there is another-dimensional-Cupcake that has a teensy-weensy Pandora doll she'd always talk to and they were connected in that way, or if Cupcake-the-dolly simply came to life because of extreme exposure to chaos magic or what is up to you, I like both ideas equally, to be honest.