My Little Pony: Friendship Is Magic

Season 1, Episode 25

Episode Title: Party of One

Air Date: 2011-04-29

Overview:

After a successful birthday party for Gummy, her pet alligator, Pinkie Pie invites her friends for an "After Birthday" party the next day. However, they claim to have other errands to run, declining the invitations. Pinkie Pie grows suspicious and sets out to solve the mystery.