This is very interesting... lol. =3
Pinkie is Maud LOL XD
Why does pinkamena have the same cutie mark as applejack?
The screenshot I used was taken from the last episode (during the song "A True, True Friend"), most precisely during the part where Applejack is singing. At that moment, Pinkie still had Applejack's cutie mark.
That's funny, it's the name I originally planned to give to it. You must be reading my mind
Are there individual versions of this?
If you open it with Inkscape (from the SVG file linked), you can just hide Applejack and get Pinkamena alone, but Applejack is not complete (a part of her tail is missing). If you want it in PNG, tell me which one you want and I'll see if I can do it tomorrow.