Season Four needs at least a third Rarity episode

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You know how, even after receiving her own key in the form of a spool of rainbow thread, Rarity will receive another episode in the form of "Simple Ways"?  Well, I hope they do a third Rarity episode for S4, probably one where she's paired up with Pinkie Pie.  In fact, I bet the premise will go like this:

 

Rarity uses Pinkie Pie as a model to design her dresses.  Unfortunately, many of them do not fit, because Pinkie is overweight as a result of her eating too many sweets.  So, the fashionista puts her party-pony friend on a strict diet and exercise regiment that the latter would frequently rebel against.  The friendship lesson would be that when you're helping a friend with a problem like weight loss, you can't be too intrusive, but neither can you ignore them; you have to help them out without unintentionally creating more problems, like what Rarity would be doing to Pinkie with regard to the diet and exercise regiment.

 

Seriously, I'm still contemplating about the lack of an S3 Rarity episode, and her becoming a possessed damsel-in-distress in the Nightmare Rarity comic book arc.