The episode centers on Pinkie Pie (voiced by Andrea Libman), whose plans to organize a birthday party for Rainbow Dash (voiced by Ashleigh Ball) are interrupted by a similarly energetic pony, Cheese Sandwich ("Weird Al" Yankovic), leading Pinkie Pie to defend her pride as a party planner in a "goof-off".

The two try to outdo each other with increasingly silly and elaborate performances until Pinkie accidentally drops a giant piñata on top of Rainbow Dash.

The episode was first teased by Hasbro Vice President of Development Mike Vogel during a panel at San Diego Comic-Con in July 2013, where he hinted about a musical season 4 episode where "somebody will give [Pinkie Pie] a run for her partying money.

[2] The tweet was discovered by co-executive producer Jayson Thiessen, who posted a reply asking the musician if he would be interested in the idea of guest voicing a character on the show since "Weird Al and My Little Pony seem to go together really well.

"[3][4] After being met with a positive response from fans of the series, Thiessen received a private message from Yankovic about a year later, expressing his interest in participating.

In the episode, Yankovic voiced a character named Cheese Sandwich, who is portrayed as being a rival to Pinkie Pie in the realm of party service.

[7] The episode was written by Amy Keating Rogers based on a story idea by Jayson Thiessen.

Rogers wrote the lyrics for the various songs with other melodies in mind: "Pinkie the Party Planner" was based on "Belle" from Beauty and the Beast;[9] "The Super Duper Party Pony" on "Supercalifragilisticexpialidocious" from Mary Poppins;[10] "Pinkie's Lament" on "Don't Cry for Me Argentina" from Evita,[11] "The Goof Off" on "Together (Wherever We Go)" as performed on The Brady Bunch,[12] and "Make a Wish" on Pink's "Raise Your Glass".

Noting Pinkie's "moronic" portrayal in other episodes, Gallant praised her "good heart", which he thought gave her more characterization.

"[21] Ingram and Andrews were nominated for a 2014 Leo Award for "Best Musical Score in an Animation Program or Series".