* AcclaimedFlop: The film received [[https://www.rottentomatoes.com/m/batman_mask_of_the_phantasm/ critical and audience acclaim]], but bombed when it was originally released in theatres.
* ActorAllusion:
** Creator/DanaDelany delivers the line "He laughs!" exactly as she did in ''Film/{{Tombstone}}''.
** While it's purely casual, in the Finnish dub Joker says that the Phantom looks like [[Franchise/StarWars Darth Vader]]. Coincidence?
*** Also it happened in the Hungarian dub. [[HilariousInHindsight More hilarious]] if you know the fact that [[https://hu.wikipedia.org/wiki/Reviczky_Gábor Joker's voice actor]] for this dub is Emperor Palpatine.
* BoxOfficeBomb: Due to a lack of advertising, the movie bombed ''hard'' during its theatrical run. This didn't last forever, though, as a certain trope to be seen below indicates...
* RealitySubtext: Andrea is named after Andrea Romano, the voice casting director for the series. The entire romance plot came about because of Creator/KevinConroy ad-libbing an "Oh! Andrea" after a series of grunts. It was originally intended to be Batman getting punched, but the ad-lib made it sound [[ImmodestOrgasm a little different]].
* ScrewedByTheNetwork: The film did ''[[NotScreenedForCritics not]]'' [[NotScreenedForCritics have a pre-release screening for critics]], which hurt it badly, since when a production company does that, it indicates that the film is probably awful. The reviews that did come out were generally positive, but they were on a ''Saturday'', instead of the launch day, and generally, movie reviews on a Saturday are passed over by readers.
* SpoiledByTheMerchandise: Creator/{{Kenner}}'s figure of the titular villain revealed that [[spoiler:"he" was actually Andrea Beaumont, Bruce Wayne's LoveInterest.]]
* VindicatedByCable: The movie turned a ''huge'' profit when available on VHS, earning ''millions'' more than it did while in theaters.
* WhatCouldHaveBeen:
** The film was going to be completely computer generated, but that was dropped for traditional cel-animation. The CG buildings during the opening credits are an artifact from that plan.
** The movie was originally planned as the series finale for ''WesternAnimation/BatmanTheAnimatedSeries'', which explains why Joker seemingly dies at the end. It was also originally going to be a two-parter called "Masks" featuring Batman Year Two's villain Reaper, with Batman's origin being a standalone ep called "Vigil."
* YouLookFamiliar:
** Andrea is voiced by Dana Delany, who later became more famous as the voice of Lois Lane in ''WesternAnimation/SupermanTheAnimatedSeries''. In fact, WordOfGod has stated that it was her stellar performance here that caused them to pursue her for the role of Lois in the first place. Bruce even had a brief relationship with Lois.
** Dick Miller, who provides the voice of Phantasm's first victim Chuckie Sol, would provide the voice of Boxy Bennett in a few episodes of ''WesternAnimation/BatmanTheAnimatedSeries''' second season the year after the movie came out.
* The fighting style Bruce was shown practicing was very close to Taekwondo, despite him calling it "Jui Jitsu". The move Andrea performed on him, however, ''was'' from Jui Jitsu.
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