Sunny, Izzy, and Hitch are turned into to foals and Pipp and Zipp have to figure how it happened.
Tropes:
- Alternate Identity Amnesia: Sunny, Izzy, and Hitch were also regressed mentally along with physically, and when they're restored to their normal ages they don't seem to remember the events.
- Call-Back: The red magic glitter that Sunny left behind in "Alicorn Issues" is responsible for Sunny, Izzy, and Hitch turning into foals when Pipp mixed the glitter into her face mask cream, not knowing it would make it magical.
- Fountain of Youth: Pipp mixing Sunny's magic glitter into her face mask cream turns Sunny, Izzy, and Hitch into foals. She and Zipp are able to reverse their age by mixing different ingredients for the cream.
- In Medias Res: The episode begins with Pipp walking in on her de-aged friends. The rest of is spent trying to figure out how things got that way to begin with.
- Power Glows: Zipp's first hint that Pipp's new facial mask might the cause of the trouble is that it's glowing.
