History YMMV / InvasionOfAstroMonster

* EvilIsSexy: The female Xiliens.

* SugarWiki/AwesomeMusic: Though it was used before in other films such as [[Film/Godzilla1954 the original Godzilla film]] and ''Film/BattleInOuterSpace'', Ifukube perfected the [[https://m.youtube.com/watch?v=GzE0XkTTeKU Great Monster War March]], a staple track in the whole Godzilla series. It’s as triumphant as it is epic.
* BadassDecay: Well, design wise, compare the fierce Rodan design in the [[Film/{{Rodan}} original film]] to the goofier one here.
** Ghidorah likewise went from an unstoppable planet killer that took three monsters to stop to being DemotedToDragon in this film, starting an unfortunate trend for the rest of his appearances in the Showa continuity.
* EnsembleDarkHorse: The Xiliens, so much so that they’ve been used in other Toho and Godzilla material outside the movies as the main alien menace against the Earth. Being brought back and revamped in [[Film/GodzillaFinalWars Final Wars helps]].

* WeirdAlEffect: Godzilla's infamous dance was a ShoutOut to the Iyami's pose from Manga/OsomatsuKun, [[Anime/OsomatsuSan Prior to 2015]] however, that series was really obscure in the West so when most Westerners saw that dance they thought it was a Godzilla reference.

* VillainDecay: While King Ghidorah is still seen as a huge threat this movie started the trend of him being a puppet of an alien force rather than an independent destructive being. A trend that would continue for most of the films afterwards.

* EvilIsSexy: The female Xiliens

* EnsembleDarkHorse: The Xiliens, so much so that they’ve been used in other Toho and Godzilla material outside the movies as the main alien menace against the earth. Being brought back and revamped in [[Film/GodzillaFinalWars Final Wars helps]].

* WeirdAlEffect: Godzilla's infamous dance was a ShoutOut to the Iyami's pose from Manga/OsomatsuKun, [[OsomatsuSan Prior to 2015]] however, that series was really obscure in the West so when most Westerners saw that dance they thought it was a Godzilla reference.

* WeirdAlEffect: Godzilla's infamous dance was a ShoutOut to the Iyami's pose from Manga/OsomatsuKun, however that series is really obscure in the West so when most Westerners see that dance they think it's a Godzilla reference.

* {{Narm}}: From the American dub, three words: "A happy moment".

** Godzilla ''jumping'' on Planet X to memetic levels.

* SugarWiki/AwesomeMusic: Though it was used before in other films such as [[Film/Godzilla1954 the original Godzilla film]] and ''Film/BattleInOuterSpace'', Ifukube perfected the track [[https://m.youtube.com/watch?v=GzE0XkTTeKU Great Monster War March]], a staple track in the whole Godzilla series. It’s as triumphant as it is epic.

** Glen's cry of 'you sticking rats what did you do to her!?' should be really ineffective and narmy but Nick's acting makes it work.

* {{Narm}}: Three words: "A happy moment".

* SugarWiki/VisualEffectsOfAwesome: [[Film/GhidorahTheThreeHeadedMonster Once again]], the great Eiji Tsuburaya outdoes himself with the effects work on [[BigBad King Ghidorah]], pulling off the flying scenes and the puppetry on '''three independently-moving heads''' so awesomely that you can easily forget that it's a guy in a rubber suit.

* VisualEffectsOfAwesome: [[Film/GhidorahTheThreeHeadedMonster Once again]], the great Eiji Tsuburaya outdoes himself with the effects work on [[BigBad King Ghidorah]], pulling off the flying scenes and the puppetry on '''three independently-moving heads''' so awesomely that you can easily forget that it's a guy in a rubber suit.

* NarmCharm: Glen's cry of 'you sticking rats what did you do to her!?' should be really ineffective and narmy but Nick's acting makes it work.
** Godzilla ''jumping'' on Planet X to memetic levels.

* NarmCharm: Glen's cry of 'you sticking rats what did you do to her!?' should be really ineffective and narmy but Nick's acting makes it work.

* {{Narm}}: Three words: "A happy moment".

* {{Narm}}: Three words: "A happy moment".
* WhatCouldHaveBeen: There were plans to release the film in the U.S. as early as 1966, under the title ''Invasion of the Astro-Monsters'', but they ultimately fell through. A work print of this earlier version was used as Toho's official "international" version of the film. The title card bares the original name, several SFX shots that got cut from ''Monster Zero'' are still intact and two lines were left undubbed.

* WhatCouldHaveBeen: There were plans to release the film in the U.S. as early as 1966, under the title ''Invasion of the Astro-Monsters'', but they ultimately fell through. A work print of this earlier version was used as Toho's official "international" version of the film. Several SFX shots that got cut from ''Monster Zero'' are still intact and two undubbed lines exist.

* {{Narm}}: Three words: "A happy moment".