Talk:My Little Pony Equestria Girls/@comment-28019041-20130817145346/@comment-4531340-20130818000036

Technically, it wasn't an "error"; it was an intentional joke inserted by one of the layout artists that was originally covered by another pony, but was uncovered in a later layout change (and by that time, the Hub had already greenlit the episode, so Thiessen didn't order her eyes changed back; plus, once the episode aired and the crew realized how popular she was, Thiessen ordered her eyes derped in all the episodes that hadn't yet been sent to the Hub, which, evidently, was from Feeling Pinkie Keen forward).