Featured on October 3rd, 2013.

Princess Luna has returned to the Nightmare Night celebration and wishes everypony to have a good time. Unfortunately, nopony seems to want to be around her. It's only when she explains her concerns to Twilight Sparkle that she finds out the real reason why this is happening.

Not even the best dentist in all of Equestria will find it easy to freshen up the breath of a pony who hasn't brushed their teeth in 1000 years.

Done for Oneshotober, even though this idea's been floating around in my head for *way* longer than that.