There are vectors of the Doctor running as a pony but I didn't see any with this face or expression, but most of the reason this was made was to recolor him into another pony and have him running from another
's vector of the exact same frame in the running animation
was viewed for reference for fixing some of the animation/puppet errors, such as the mane and legs. Some things I left alone, like his ear; I think it looks odd because of how big his neck is but it wasn't something I that I could think a better solution for fixing.
Time: 3 hours
Traced from Season 2, Episode 26 (A Canterlot Wedding Part 2) @ 15:26