* AlternateCharacterInterpretation: In the fandom: Louise or the Baroness, a very minor character with only one shot and no lines during Nishi's telling of Baron's past in WhisperOfTheHeart, has become a fan favorite, with personalities ranging from evil, rival love interest with Haru for Baron, to sweet and kind rival to even Haru or Baron's sister in some fics. If she was a person, she'd either be totally insane or have Gollum-level split personality disorder.
** Also the Cat King, ranging from slightly senile old man(cat?) to psychotic, so obsessive over wanting Haru for his own he'll kill to do so.
* AmbiguouslyGay: Natori's care for the King seem to go beyond simply duty. He immediately express concern whenever the King hurts himself or gets upset, gets an offended look when Muta refers to him in a mocking manner, and the camera cuts to him alone having a shocked reaction when the King [[spoiler:asks Haru to marry him instead]]. Also when the King [[spoiler:decides to retire, Natori immediately concludes that he'll be retiring too in such case.]]
* EarWorm: [[http://www.youtube.com/watch?v=NwoDrRCibhA Kaze Ni Naru]]. [[SweetDreamsFuel Sweet dreams]], listener.
* HilariousInHindsight: Several years after Creator/AnneHathaway starred in this movie about cats, she was cast as none other than [[Film/TheDarkKnightRises Catwoman.]]
*** Haru even comments, upon seeing Lune walking down the sidewalk with the box of fish crackers, "Cat burglar."
** [[http://www.youtube.com/watch?v=56nX41b82CU A 2007 short]] features a possibly unintentional Baron {{Expy}}.
* MorePopularSpinOff: It could be argued that this movie is more well-known and those who have seen this movie first [[SequelDisplacement might not know that it was an indirect sequel]] of WhisperOfTheHeart. It has more fanfictions and fanart in comparison to its first movie.
** ContestedSequel: WhisperOfTheHeart may be better in terms of animation and story, but The Cat Returns (itself not a weak movie) is just as popular, if not more.
* {{Narm}}: Haru's over-the-top reaction to turning into a cat. Made even more hilarious in the Japanese version, in which she just screams "NEKO!" at the top of her lungs.
* {{OTP}}: Haru/Baron for a majority of the fans. All minor characters except Lune and Yuki are shipped with another of the opposite gender in at least one fanfic or fanart.
* ShipsThatPassInTheNight: Baron/Lune. No one knows why...
* SoOkayItsAverage: It's good, but it really does feel like this when you hold it up next to many of the other movies from the studio.
* {{Squick}}: As if the Cat King trying to marry Haru to his son Prince Lune wasn't enough, when the prince says no, he tries to marry her ''himself''.
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