The Power Rangers Rocky, Adam, Billy, Aisha, Kimberly and Tommy participate with Bulk and Skull in a charity sky dive for the Angel Grove
observatory in anticipation of Ryan's Comet, which will pass by in two
days. Having waited too long to jump, Bulk and Skull accidentally land
in a construction site, where a giant egg is unearthed from a chamber
underground. The evil energy alerts Zordon, an interdimensional wizard and the Rangers' mentor, who warns them of Ivan Ooze: a morphological being bent on the conquest of Earth. Zordon sends the Rangers to return the egg to its chamber, unaware that Lord Zedd and Rita Repulsa
have already freed Ivan Ooze and ordered him to destroy Zordon. Ivan
leaves the Rangers to face his Ooze men while he lays siege to their
Command Center and incapacitates Zordon. Meanwhile, the Rangers morph
and dispatch the Ooze men before suddenly losing their powers. Making
their way to the Command Center, they find it destroyed and Zordon
outside of his time warp, now dying from rapid aging.
Zordon's robotic assistant Alpha 5
sends the Rangers to the planet Phaedos in hopes of obtaining the Great
Power in order to save Zordon. Ivan usurps Rita and Zedd and traps them
in a snowglobe, offering their minions Goldar
and Mordant the choice to join him or suffer the same fate. They agree
to serve him. Ivan sends a squadron of bird-like Tengu warriors to
Phaedos while he hatches a plan to unearth his Ectomorphicon Titans: two
massive machines he had constructed for his conquest that were buried
near his chamber. He puts his ooze into mass production
and, after disguising himself as a carnival wizard, he gives out free
jars of it to the city's children, including the Rangers' friend, Fred
Kelman. When their parents come into contact with the ooze, it
hypnotizes them into becoming Ivan's work force. After Fred discovers
his father missing, he finds him and the other parents at the
construction site and discovers Ivan's plans.
The Rangers arrive on Phaedos and are almost killed by the Tengu
until they are rescued by Dulcea, Phaedos' Master Warrior, who initially
tells the Rangers to go back home. When she hears of Zordon's plight,
however, she agrees to help them and takes them to a ruined temple. Once
there she gives them the power of the Ninjetti, showing them their
animal spirits: Rocky is the ape, Adam is the frog, Billy is the wolf, Aisha is the bear, Kimberly is the crane and Tommy is the falcon.
She shows them where the monolith housing the Great Power resides, but
tells them that their journey has to be without her because if she went
beyond the temple, she would age as rapidly as Zordon. As the Rangers
quest through the jungle, they encounter an animate dinosaur-like
skeleton, which Tommy defeats before they find their way to the temple.
Working together, they defeat its four guardians, unlocking the Great
Power within to restore their powers.
Back on Earth, construction is completed on the machines and Ivan
orders the parents to return to the construction site and leap to their
dooms. Fred rushes to the rest of the kids and Bulk and Skull, partying
at Ernie's, and tells them of the situation. Together they board the
city's monorail
and head to the construction site to save their parents. The Rangers
return and call on their new Zords. They defeat one of the titans, which
enrages Ivan and leads him to merge with the other machine. The Rangers
form the Ninja Megazord while Tommy saves the train, whose track was
damaged by Ivan. Outmatched, the Ninja Megazord is damaged; Tommy
combines his Zord, creating the Ninja Falcon Megazord to fight Ivan.
Billy plots a course to outer space intending to lead Ivan into Ryan's
Comet. Ivan pins them down, but Aisha causes him to lose his grip and
they fly out of the path of destruction. Ivan's destruction breaks his
spell on the parents, who come to their senses as their kids, Bulk and
Skull keep them from stepping over the cliff as Fred reunites with his
father. Returning to the Command Center, the Rangers learn to their
sadness that Zordon has died. Using what they learned – that all things
are possible – they use the Great Power to restore the Command Center
and resurrect Zordon, reuniting with him.
During the following fireworks celebration, the Rangers congratulate
Fred for his bravery. When a message thanking the Rangers is lit, Bulk
and Skull are offended, although they had a legitimately large part in
saving lives.
In a mid-credits scene,
Goldar sits on Zedd's throne and calls himself "King Goldar, the ruler
of the universe" before Zedd and Rita enter, growling at their turncoat behavior. Goldar and Mordant look at each other and nervously proclaim "Uh-oh!" before the credits continue.
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