Party of One

Party of One is the twenty-fifth episode of the first season of My Little Pony Friendship is Magic. In this episode, Pinkie Pie investigates her friends’ excuses for not attending one of her parties.

Plot
At the beginning of the episode, Pinkie Pie visits each of her friends and sings invitations to Gummy's one-year birthday party. When she's finished, she is exhausted and remarks to Gummy, "Next time I think I'll just pass out written invitations."

Gummy’s birthday party was held on the second floor of Sugarcube Corner. Pinkie tells Rainbow Dash and Applejack she's happy they made it to the party, and the two say they'd never miss it. Applejack bobs for apples, but bites a fake spring-loaded apple that pulls her back into the vat. When Dash emerges from the apple bob, Gummy is clinging to her face.

Rarity compliments Pinkie’s punch, but spits it all over Pinkie's face when she sees Gummy dipping in the punch bowl. She forces a smiles and sips more punch, but spits it into a plant pot when Pinkie turns away. Pinkie joins Twilight Sparkle and Fluttershy, who compliment her party. Pinkie accidentally knocks Twilight Sparkle and Fluttershy into a wall while dancing, but later all the friends and Gummy dance together. That night, when the ponies are leaving, Twilight suggests that they "do this again soon”, and Pinkie agrees.