Talk:Episodes, films, and shorts/@comment-27515470-20150428112910/@comment-10390252-20150428121652

Um... Okay, I'll give it a shot.

1) No, Rainbow Dash and Scootaloo aren't sisters; Rainbow is Scoots' mentor and role model;

2) Derpy's popularity is a mystery to me. I think that, for a long time, the art team used her as a "Where's Wally"-style in-joke. Did you see where Derpy appeared in this week's episode? However, like a lot of background ponies, she became more popular through how various creative fans used her in their original works - Her family with Dinky Doo and Amethyst 'Sparkler' Star and her time as the companion of the time-travelling hero Dr Whooves.

Ultimately, Derpy is more popular as an original fan-character than she is for her very few canon appearances. Lyra, Bon-bon, Octavia and Vinyl Scratch are other examples of ponies more popular for their use in fan-art and fan-fiction than they are for anything they've done in an episode.