Saw your question as well on the other animation for Apple Bloom. And yes, your base helped a lot in making these animations. I imported the PNG files into Flash to make vector versions of the frames. But I also made a few changes and redrew them slightly so that every fourth frame is the exact symmetrical opposite of the other (1 & 4, 2 & 5 etc).
There's a third character in the works, and I'll also make a fourth submission for all three together. If you want, I can add a note in the deviation comments about using the original base you made.