These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
In one episode of the second series, the Fenarinarsa Momo asks the other Momo about her pets. Then, a musical number where the pets sing about their personalities plays, and after this, the episode resumes.
Ear Worm: The original TV series theme song, "Love, Love, Minky Momo," sung by Momo's first voice actress, Mami Koyama.
Macekre: La Ronde in my dream was adapted by Harmony Gold and Carl Macek. Most of the dialogue is altered and the opening scene is moved to the end and becomes a dream sequence, but the overall plot remains the same.
Moe: Considered by some to be the first moe anime.
Several elements in scripts Shudo wrote for Pokemon are recycled from Minky Momo. "The Ghost of Maiden's Peak" noticeably contains many of the same elements as The Bridge Over Dreams, and Pokémon: The First Movie has a similar ending to La Ronde in my dream.