Across his 70-year history in Japanese and American films, Godzilla has amassed a rogue's gallery of kaiju to face down, from King Ghidorah to Mothra to Mechagodzilla to Millie Bobby Brown. (Kidding! She is neither skyscraper-sized nor Godzilla's enemy.)
Also seen in the Skull Island post-credit scene, and making a sinister showing in Godzilla: King of the Monsters, is King Ghidorah - the three-headed cinematic arch-nemesis of both Godzilla and Mothra who dates back to 1964.
Mechagodzilla, the mechanized kaiju beat Godzilla outright in Godzilla vs. Kong. His arsenal of missiles and lasers decimated Godzilla, who was almost sluggish in his attempts to fight off his attacker.
The rivalry between Godzilla and King Kong is well noted within their established mythos, including and especially the current MonsterVerse canon, but there's one kaiju Godzilla hates far more than Kong (or any other Titan, for that matter): King Ghidorah - and there's only one reason as to why.
Anguirus was reintroduced in Destroy All Monsters as an ally and best friend of Godzilla living with him on Monsterland, a role that Anguirus maintained throughout Godzilla vs. Gigan, Godzilla vs. Megalon, and Godzilla vs. Mechagodzilla.
Serving as the final villain of the Heisei era, Destoroyah was born from the Oxygen Destroyer, making him the personification of the very weapon that killed Godzilla in 1954. In a sense, he was indeed the ultimate adversary in Godzilla vs. Destoroyah, pushing a dying Godzilla to his limit and defeating his son.
Summary. Godzilla is the clear winner in the battles against Kong, showcasing his superior power and invincibility. Despite losing the fights, Kong still plays a crucial role in the story, defeating Mechagodzilla and earning the title of "King Kong".
In films that depict Godzilla as an aggressor, we rarely know why Godzilla is angry enough to invade Tokyo. Presumably, he is provoked by war, pollution, industrialization, and of course, the dropping of the A-bomb. Loud noises, bad smells, and humanity's general disregard for the natural world invoke his wrath.
After absorbing excessive amounts of radiation, Godzilla's powers were boosted to new heights. With his enhanced strength also came a surprising side effect, turning Godzilla's usual blue glow when he is powering up into a vibrant pink.
Ebirah is one of the weakest monsters Godzilla has ever faced. A giant crustacean, Ebirah lacks many of the traits and capabilities necessary to fight the King of Monsters effectively. Armed with only two differently-sized claws, the mutant arthropod doesn't have a lot of options for close-quarters combat.
Ghidorah is Godzilla's greatest foe, and it isn't close. This alien creature sports three deadly serpent-like heads, it can fly, and it's capable of withstanding everything Godzilla can throw at it. Though Godzilla manages to win in the end, it's usually by the closest of margins.
What is Godzilla's weakness? Godzilla is slowed down by the cold, and in some movies he is weak to electricity. Godzilla has also been killed by his own doing, for example he pushed his body and went to far entering Critical Mass which is what killed him in Godzilla v.
Mothra doesn't simply die in King of the Monsters - she transfers her life force to Godzilla. The film even has the atomic pulse Godzilla sends forth to kill Ghidorah briefly taking the shape of Mothra's wings and her chirping is heard when he attacks.
This is why Godzilla immediately recognized Kong's presence on Earth as that of his ultimate, instinctual rival, and why it was inevitable that the two would fight. Kong didn't bow before Godzilla like the other Titans did in King of the Monsters, and more than that, Kong is inherently a threat to Godzilla's kingship.
Godzilla has only lost to six of his adversaries in the franchise, showcasing his dominant reputation as the King of the Monsters. Biollante, SpaceGodzilla, King Kong, King Ghidorah, Mothra, and Mechagodzilla have all achieved victories over Godzilla at least once in their battles.
Despite being a god, Zeus was shown to be neither all-powerful nor immortal. Zeus drained himself of his power by unleashing all of it upon Godzilla, and was later killed in the eruption of Mount Vesuvius caused by Godzilla.
The saddest monster death wasn't a death, per say, but it was framed as one until the next movie where we learned he survived. It was Godzilla himself from 1984/5, when he freejumps into a volcano.
His swan song came to pass in Godzilla vs. Destoroyah, which revealed that a dangerous buildup of radiation was causing him to experience a nuclear meltdown. Not only was Godzilla dying, but his situation promised to take most of the population of Japan with him.
Godzilla is shown to have a crush on Gojirin, and she seems to return his feelings. Occasionally, Gojirin is a source of conflict among Godzilla and his friends, as both Baragon and Anguirus compete with Godzilla to impress her.
Biollante is a genetically-modified rose Kaiju hybrid created from Godzilla's DNA by the Devonians, making her Godzilla and SpaceGodzilla's half-sister. She fought against Godzilla on the Monster Islands, but was defeated and escaped into the planet's atmosphere.
