--> ''When a black mountain appears in the sky, and the red sun rises in the West, a monster will appear and try to destroy the world''.
--> ''When the people of Okinawa are in danger, a monster will appear and save them''.

--> ~ Two prophecies of the Azumi Royal Family

Both of the prophecies above are put to the test in Godzilla's 20th anniversary outing, ''Godzilla vs. Mechagodzilla'' (''Gojira Tai Mekagojira'', [[NamesTheSame not to be confused with]] [[Film/GodzillaVsMechagodzillaII the Heisei]] [[Film/GodzillaAgainstMechagodzilla and Millenium]] films). The monster that will try to save the people of Okinawa is King Caesar, the ancient guardian of the Azumi Royal Family. The monster that will destroy the world... is at first believed to be Godzilla, but after Godzilla's ally Anguirus is brutally attacked and wounded by the beast, people start to notice that something is off. When Godzilla attacks a refinery, another Godzilla appears. A vicious battle soon follows, where the first Godzilla soon sheds its skin in a fiery display to reveal a mechanical weapon of destruction: Mechagodzilla. The resulting battle ends in a draw, but questions remain. Who built Mechagodzilla, and why?

The answer to the above questions is that a race of aliens from "The Third Planet of the Black Hole," or Simians, have come to Earth to setup a new home for themselves. Instead of asking nicely, however, they've decided that the best option is to use Mechagodzilla to destroy a sizable portion of Japan to make way for their own settlement.

However, there is still the issue of the Azumi prophecy, and with it, King Caesar. If King Caesar can be awakened, then other monsters may soon follow, and so the Simians attempt to gain control of a precious statue that is instrumental to the legend to prevent the divine monster's awakening. Deciding to launch a two-pronged plan, the Simians capture an Earth scientist who is familiar with the technology they used to create Mechagodzilla, to speed up repairs, and send their own agents out to capture that damn statue. What follows are gunfights, INTERPOL agents with some bad hair-dos, and archaeologists fighting in a race against time to awaken King Caesar and stop the Simians. Fortunately, Godzilla is still alive, but will he be able to rejoin the fray before it's too late?

Well, yeah, of course he will.

''Godzilla vs. Mechagodzilla'' was released in 1974, as the 14th ''Franchise/{{Godzilla}}'' movie and in honor of the King of the Monsters' twentieth birthday. The film was directed by Jun Fukuda, with music by Masaru Sato and SFX work by Teruyoshi Nakano.

!!! "When the people of Okinawa are in danger, a trope will appear and save them.":
* AlienInvasion: Once again a plot element during this era of the franchise.
* AttackReflector: King Caesar can reflect Mechagodzilla's eye beams with his own eyes.
* BeingWatched: There are two instances of this.
** In Act I, a man is seen watching another man who is watching the professor. The same man who was being watched (and was watching the professor) reappears later in the movie on a boat because [[spoiler:he's an alien trying to prevent King Caeser from being summoned.]]
** When Godzilla is fighting Godzilla, the aliens are watching the fight.
* BigDamnHeroes: Agents Nanbara and Tamura.
** Just as Mechagodzilla is about to finish off King Caesar, the true King of the Monsters appears.
* BloodFromTheMouth: Poor Anguirus.
* BloodIsSquickerInWater: Godzilla gushes with blood underneath Tokyo Bay after the beam explosion knocks him down into it.
* CallBack: Anguirus emerges in the prologue sequence... somewhere... after being swallowed up by a fissure at the beginning of the previous film.
* CaptainObvious: "Space titanium? You mean it's from outer space?"
* [[ChekhovsGun Chekhov's Pipe]]
* ChestBlaster: Mechagodzilla is packing one, and first uses it to take out the mountain that King Caesar is hiding behind.
* CrazyPrepared: The Professor, who made a special pipe whose "bowl's metal includes [[EvenTheSubtitlerIsStumped a?????]]" and "If you separate it in this way, [[TechnoBabble magnetic waves will develop that will destroy the positive and negative electrodes]]", just ''because''.
* CurbStompBattle: Mechagodzilla's fight with Anguirus, and most of his fight with King Caesar, who only survived because of Godzilla's timely arrival. Even after he shows up, Mechagodzilla still inflicts its fair share of damage on the two.
* {{Determinator}}:
** Despite being grossly outmatched by Mechagodzilla, it takes his jaw being shattered for Angurius to finally give up.
** King Caesar counts as well. After Mechagodzilla catches on to his trick, his obviously outclassed. But he was summoned to protect Okinawa, and he's gonna do so even if it kills him.
* EverythingsBetterWithMonkeys: Why the aliens are apes.
* EvilKnockoff: Mechagodzilla himself.
* EyeBeams: Mechagodzilla. Fortunately, King Caesar can reflect them.
* Foreshadowing: Mechagodzilla might be well disguised as Godzilla when he first appears, but does not copy Godzilla's iconic roar, providing the first clue that something is off.
* {{Gorn}}: This is definitely one of the, if not ''the'' goriest Godzilla film.
** The [[BloodierAndGorier violence was increased]] to compete with the ''{{Gamera}}'' films.
* KillerSpaceMonkey: Simians, though they're not ''as'' brutish as most examples of the trope are.
* MacrossMissileMassacre: Mechagodzilla has dozens and dozens of missiles, lasers, and rockets at his disposal and he uses ''all of it'' in his battle against Godzilla and King Shisa.
* MeaningfulName: King Caesar, or Kingu Shisa. Refers to the [[http://en.wikipedia.org/w/index.php?title=Shisa shisa of mythology]]. Unfortunately, this is sometimes overlooked.
* MoreDakka: Mechagodzilla, armed with BreathWeapon, laser eyes, with missiles on its fingers and toes.
* NewPowersAsThePlotDemands: Godzilla himself. After his first defeat, he attracts lightning bolts to gain the power of magnetism and, oddly enough, heal.
** Mechagodzilla: His forcefield to protect him from Godzilla's breath, he only uses this once though.
* NighInvulnerability: Mechagodzilla is made from space-titanium and sports an unbreakable force field. Ultimately subverted, however, as it turns out Caesar's physical blows are strong enough to deal serious damage to it once Godzilla gives him the opening to do so.
* OffWithHisHead: How Mechagodzilla is finally defeated due to Godzilla's new magnetic based powers.
* PrecisionFStrike: A mild one, but in a mid-70s' Godzilla movie it really stands out. The alien leader spouts this gem before unveiling Mechagodzilla in his true form: "Damn Godzilla! You're mistaken if you think your powers are a match for Mechagodzilla!"
* SadlyMythtaken: Subverted with King Caesar. The Shisa is considered a guardian beast in Okinawa folklore and there is a story about a Shisa being awakened to fight a monster (Though, it's a sea dragon instead of a giant robot).
** The original myth is even referenced in the song used to summon/awaken King Caesar. Translated, she's singing "Kill the dragon, King Caesar!".
* SpaceX: The aliens boasted that Godzilla could not break Mechagodzilla's armor of space-titanium.
* SpellMyNameWithAnS: King Shisa, commonly misnamed as "King Caesar", and in the case of the Star Maker video blurb, "King Seeser", because of the international dub and some of Creator/{{Toho}}'s own material.
** Toho's official English name for him is King Caesar.
*** Since not many English-speaking people that aren't aware of Japanese folklore would even know what a Shisa ''is'', let alone its role in Okinawan lore, the renaming is probably only to avoid having to put more exposition in the English release of the film to explain these details, though this is just speculation.
* ThisCannotBe: The alien leader has this reaction when Godzilla and King Caesar finally destroy Mechagodzilla.