When Pinkie falls ill, Rarity takes her place as a foalsitter for The Cake Twins, and they take a real shine her to. This makes Pinkie feel like she's been replaced, and it's up Mr. and Mrs. Cake to show her that's not true.
The eleventh installment of What If series that involves the rewriting of episodes. This one involves eight rewrites of episodes from Seasons 1-3 plus 8, and four from Season 9. (Warning!: Rewrites based on personal opinion. Please respect it!)