When Rita Repulsa uses an Ancient Artifact to transport herself to a universe without Power Rangers, she finds herself in a world with aliens, kaiju, and… Godzilla! Hoping to annihilate this new foe, Rita hurls her own terrible creatures into battle. But she never expects that the Rangers have followed her to this alternate reality, pitting the Dinozords themselves head-to-head with the King of the Monsters!
A sequel, Godzilla vs. the Mighty Morphin Power Rangers II, started in April 2024. Rita, having started a campaign to conquer the multiverse, has come into contact with Astronema and the Psycho Rangers, empowering the Psycho Rangers with the abilities of Godzilla's foes. While tracking them, a dimension hopping White Ranger ends up accidentally bringing Godzilla in with him when going to get help from the Power Rangers. Now Rangers and kaiju must unite against the Alliance of Evil and their new trump card: Spacegodzilla.
Godzilla vs. The Mighty Morphin Power Rangers provides examples of:
- Adaptational Badass: Tommy successfully fights off attempts to mind control him through Heroic Willpower, something his canon counterpart never did.
- Admiring the Abomination: Unlike Finster, who is frightened by the presence of monsters on the Earth that Rita traveled to, Rita is delighted to see giant creatures and the destruction they sow.
- And I Must Scream: The crossover ends with Rita and her goons endlessly tumbling through the void between dimensions, surrounded by images of Rangers and Godzilla.
- Big Bad Wannabe: The Xiliens are in the process of invading Earth, with no success due to Godzilla's intervention. Even after they team up with Rita, she is clearly the bigger threat, and they are powerless against her when she betrays them.
- Card-Carrying Villain: Rita happily brags about having no motivation beyond wreaking havoc and destruction across a defenseless planet.
- Curb-Stomp Battle: Ghidorah dominates both Godzilla and the Megazord. Godzilla only lands one hit with his Breath Weapon, which does no real damage.
- Even Evil Has Standards: The Xilien Supreme Controller only prefers to send out monsters that are pliable to orders, and when Rita sends out less obedient creatures, they are quick to run when things go bad. Seeing that failure, the Xilien commander no longer wants to send any more monsters in rash attacks, seeing it as a waste of resources.
- Evil Is Not a Toy: When Godzilla and the Rangers start gaining the upper hand against Rita and the Xiliens' monster army, Rita forces the Xilien commander to admit that they do have one more kaiju. Unfortunately for everyone involved, Rita ignores the commander's warnings and releases King Ghidorah, who turns out to be a wild, uncontrollable juggernaut that attacks everything, even those who are supposed to be its allies.
- Final Boss: King Ghidorah is the last opponent Godzilla and the Megazord face together.
- Godzilla Threshold: A villainous example used against the Trope Namer himself; Rita, seemingly having depleted all of the monsters at both her and the Xillians' disposal, coerces them to admit that they have one last resort: King Ghidorah. Despite being warned that it will destroy everything, ally and foe alike, Rita releases it anyway.
- Immune to Mind Control: Rita attempts to mind control Godzilla early in the series, but his mental fortitude is so strong that the attempts only serve to make him angry.
- The Juggernaut: Ghidorah easily defeats Godzilla and the Megazord when sent against them. After he turns on Rita, she sends Goldar, Scorpina, and her three remaining monsters to kill him. Ghidorah defeats them all. It takes the Mega Dragonzord and Godzilla's combined power to defeat him.
- Let's You and Him Fight: As can be expected, Godzilla takes on both Dragonzord and Megazord in a battle of titans. Unlike other franchise crossovers where the Rangers make peace with other heroes, Godzilla keeps wanting to battle the Megazord even after they've vanquished all other enemies after their teamup.
- Made of Iron: Godzilla gets impaled by the Megazord's Power Sword and still gets up to fight the Xilien ships sent to finish him off.
- Mythology Gag: Perhaps, perhaps merely a coincidence. But its certainly fitting that one of the monsters used is Snizzard, given he was voiced on the show by Bryan Cranston, who would go on to star in the first entry of the Godzilla MonsterVerse film series.
- Never My Fault: When Ghidorah nearly kills Rita, she questions whose idea it was to send the monster out, forgetting that it was her idea.
- Pragmatic Villainy: The Xiliens do not like to waste resources, and the Supreme Controller is against sending monster after monster in failed attacks against Godzilla and the Megazord with no guarantee of victory. Too bad for him, Rita doesn't listen and turns loose Ghidorah, who nearly destroys them all. Realizing the invasion of Earth has failed, when Tommy breaks out of his cell, one of the guards makes no attempt to stop him and gives him back his Morpher so Tommy can help stop Ghidorah and get the Power Rangers back to their universe.
- Poor Communication Kills: A variation since Godzilla can't speak for himself. When the Rangers arrive in Godzilla's universe, they understandably believe that he's one of Rita's creations and attack. It isn't until a bystander on the ground explains to the team that Godzilla is a native that they realize that they jumped the gun.
- Villain Team-Up: Rita, Finster, Goldar and Scorpina team up with the Showa version of the Xiliens.
- We Have Reserves: Rita's whole attitude towards fighting Godzilla and the Rangers is to keep sending wave after wave of monsters at them, whether they belong to her or the Xiliens, with no regard for how much her own resources or her allies' resources are getting whittled down.
- You're Insane!: Tommy calls Rita insane after she explains her plan to use her monsters and the monsters of the Godzilla universe to finally conquer her home reality. Her reply:What else is new?
