Talk:Derpy/@comment-174.97.216.234-20130219141346/@comment-1812595-20130220085455

I don't really think it was last minute, I think it was kind of deliberate and clever. I think they probably excluded her from the other 12 episodes and added her in the finale episode to make fans who might have been upset over the whole Alicorn Princess deal feel less miffed.

It's doubtful that Hasbro actually banned Derpy from being in the backgrounds since they have TONS of Derpy merchandise out and even after the controversy they still made more without recalling the toys or something. So my guess is it was planned by the crew to have her return be a big thing in the finale episode.