I recognize that Milhouse pony! It was in a pony customization thread on Canv.as a while back… but now it has wings! Well well. His cutie mark was the “downvote” button’s icon on Canv.as at the time. (There is no such button anymore.)

Sauce.

There are a few bronies on Canv.as, but it’s amusing to see remixes turn up in other places.