When Ash helps with the performance at the end of the episode, he remarks, "It's kinda hard to match the lip flaps, isn't it?" This is a reference to "lip-flap," which is a problem faced by production companies such as 4Kids when dubbing anime.
In the original version of the episode, Kay and Ash voiced over Raichu and Pikachu, respectively, using their normal voices. In the dubbed version, they used higher pitched, comedic voices.
This episode aired on the second anniversary of "Pokémon - I Choose You!"
In the last scene where all the Pokémon are dancing, Aim to Be a Pokémon Master was played in the background. In the English version, Pokémon World was played. The dancing scene is the only time a Jynx's feet have ever been seen.
Professor Oak's Pokémon Lecture: Pokémon senryu summary: Free, Free; a freely flying Butterfree.