Looks like Rainbow Dash beat them all this time around. I'm actually kind of surprised to be honest. My bote still stays with Starswirl Twilight Sparkle. She has bells guys, bells!
And the next poll due to popular demand on this one: Best non main character Nightmare Night costume. We are only rolling with names characters this time around. I don't think the poll can handle all 40something costumed background ponies.