Extend the Story - Add a Room

Fluttershy eeped as she felt herself be picked up and placed on the toilet by none other than Pinkie. "Pinkie, I'm a year older than you!" She protested.

Pinkie just grinned. "Come on, Fluttershy. Won't it be fun to be younger for a change?" Pinkie suggested, pulling down her friend's diaper. "I've already got experience helping Mr. and Mrs. Cake potty train Pound and Pumpkin Cake. And unlike them, I know you won't give me a hard time on purpose."

Fluttershy just sighed. "Fine, Pinkie, I guess I'll play along for now. But as soon as we get out of this bathroom it's going to stop."

Pinkie smiled, patting Fluttershy on the head. "See? That's the spirit, Fluttershy. Now you just get comfy, and your Auntie Pinkie Pie's gonna read you a story. Let's see, what would be good reading material for you?"

"Everypony Poops"