The thing is, it's not that badly drawn (emphasizing on "that", because it remains average, at best)…
But the sole premise of this is ridiculous. Not only is the author parting from the event of Rainbow Dash being a human (I have nothing against humanized art), but also that she would agree to go to prom (Which, if she were true to her character, she wouldn't even care about to begin with, much less in a frilly dress) with him… All of this can be barely excused for it being an "imaginary" prom, but still…

Truth be told, it's about 4-5 in the morning over here, I can't sleep, and I'm just trying to kill time until the sun comes out.
I don't know why I even wrote this comment to begin with.
Sorry xD

I can't stop looking at his legs! One's a twig, and the other looks like it belongs on an Olympic athlete!