First off- Vision: Humanized Daring Doo.. normally I would be neutral to these kind of art concepts but this is definitely a step above the rest! (coming from the brony who drew 90% of all of the pony memes, it is hard to believe it came from somebrony else!) This pose is really explains for itself! Adventurous, daring, dashing, leader and fearless! This really fits Daring Doo's envision! (Silly brony, that's not how you draw Rainbow Dash)
Originality: If there wasn't thousands of pony avatars and pony groups featured on the same page as this, you wouldn't have known it came from a little girls show. I'm sure that a dew of those pony-haters would like this as well! *I'll give them the test this week, a few of my friends are brony-haters (but no worries, they don't hate them personally..they're more like neutral haters)
Technique: Comon, it comes from *GlancoJusticar... what technique is there is there to critique^!? The massive Cutiemark background deserves its views/favorites! its fukken pony-perfect! I wouldn't doubt it for one second that as soon there's a Daring-Doo fanfic, that *MaximillianVeers would feature this as the cover page! one great implied Brony deserves another!
Overall, Great job and I hope that you had as much fun drawing this as I did admiring it!
It isn't really my style, but that's beside the point. I believe you did a freaking fantastic work with the posture. Bodies and their positions are one of the hardest things to convey, especially in a dynamic way.
The coloring is well done, except for the shadows in the legs, but I think it's just me on that one. For some reason I feel like the light would cast the shadows in a different position, more to the right.
All in all, these are but little things when looking at the big picture, quite literally. I believe a successful drawing is one that manages to convey something in a proper way, and as I stated before, you manage that with your excellent eye for dynamic looking postures.