The story is set in the Valley of Peace, a fictional land in ancient China inhabited by anthropomorphic animals. Po, a giant panda, is a kung fu fanatic who idolizes the Furious Five — Tigress, Monkey, Mantis, Viper, and Crane — a quintet of kung fu masters trained by the red panda Master Shifu. As he helps his goose father Mr. Ping in his noodle restaurant, Po is unable to pursue his dream of becoming a kung fu master himself.
The Ninja Turtles are alerted by their master Splinter that they have been careless and discovered fighting the Purple Dragons on TV. Denying this, they set out to break into the Purple Dragons' HQ to get to the bottom of these doppelgängers. Upon doing so, the Turtles discover that their "impostors" are Turtles from another universe. They escape together, but the '03 Turtles find the '87 team childish as they refuse talk until lunch. They enter a pizza place, only to terrify the citizens, who call the cops; the turtles flee, only for the '03 Turtles and Splinter to capture them. '87 Leo explains his team was fighting Shredder over Mutagen in the Technodrome; the dimensional teleporter backfired, sending them all to this world. Checking recent tremor reports, the Turtles find the Technodrome; however, '87 Shredder manages to elude them, forcing his foes to build a portal device to reach their universe for "anti-Technodrome gear". In the meantime, Shredder locates an '03 Shredder on an icy asteroid. After Ch'rell is thawed out, he is contained for vivisection, as he's too insane to work with; however, his adopted daughter, Karai, breaks into and frees him; she had been monitoring his exile.
Un naufragé se retrouve sur une île déserte suffisamment pourvue pour l'accueillir. Il décide cependant de quitter l'endroit, mais en empêché par une grande tortue marine à la carapace rouge. Après avoir tenté de la tuer, le naufragé connaît une aventure merveilleuse et reste vivre sur l'île.
Three years have passed since Gamera defeated the Legion, and the world is once again plagued by the Gyaos, which have evolved into Hyper Gyaos. Mayumi Nagamine, noted ornithologist, returns to aid the Japanese government in addressing this threat. A graveyard of Gamera fossils is found at the bottom of the sea. Shadowy government agents, occultist Miss Asukura and Kurata Shinji, are meanwhile working to a different agenda, with Asukura believing Gamera to be an evil spirit.
Batman, Batgirl et Robin forment une alliance avec les Tortues Ninja pour affronter Shredder qui s'est apparemment joint à Ra's al Ghul et sa Ligue des Assassins, afin de pouvoir prendre le contrôle de la ville.
A year has passed since the battle between Gamera and the Gyaos, and Japan has struggled to rebuild its cities in the meantime. The military has kept a cautious vigil on the nation's coast, but so far Gamera has yet to return. Suddenly, a series of bizarre incidents reveal a new threat to the land of the rising sun. On a moonlit stroll, science instructor Midori Honami watches as a huge meteor plunges into the mountain snow. The next night, two security guards are horrified as they see large insect-like creatures stealing glass bottles from a nearby warehouse. Soon after, the entire city of Sapporo is covered with strange plants and the link between these events soon becomes clear.
Momo, une petite fille, vit une vie paisible avec ses amis. Mais lorsque d'étranges hommes en gris arrivent en ville et proposent aux habitants de placer leur temps en épargne à la Banque du Temps pour l'utiliser plus tard, une étrange frénésie s'empare de la cité, obsédée par l'idée de ne plus gaspiller la moindre seconde. Pour déjouer les plans des Hommes en gris, qui utilisent le temps des habitants sans jamais le leur rendre, Momo doit partir à la recherche du professeur Secundus Minutus Hora et de la tortue Cassiopée.
As a crime wave rises in New York City, Channel 3 news reporter April O'Neil talks about rumors of young children and teenagers being reported as the majority of the thieves, connecting it to a rumored Foot Clan, which originated in Japan. On an ordinary night, she comes across thieves stealing from a news van and is attacked. She is rescued and one of her rescuers leaves behind a sai as police arrive to collect the beaten criminals. In the storm sewers, four anthropomorphic turtles return to their underground home and meet with their master Splinter, who advises them to remain hidden from the world and work only in the shadow. Raphael admits he lost his weapon, and when the others order pizza he leaves in disguise to see a movie. After leaving the movie, he encounters Casey Jones who tries to exact justice on a pair of muggers by beating them with sporting implements. After a brief stand off between the two, Casey takes off into the city and Raphael loses his temper. Returning home, Splinter confronts Raph about his temper.
A ship carrying plutonium collides with a floating atoll off the eastern coast of the Philippines, one of many incidents occurring throughout the area. As the anomalous formation approaches Japan, a team of scientists led by Naoya Kusanagi (Akira Onodera) discover orihalcum amulets and a stone slab covered in Etrurian runes on the atoll. During the investigation, the atoll suddenly quakes, destroying the slab and throwing the scientists into the ocean. One member of the team, Marine Officer Yoshinari Yonemori (Tsuyoshi Ihara), sees the eye and tusk of a giant turtle.
Gamera self-destructed to destroy several Gyaos in 1973, the tale picks up thirty three years later, when the son of one of the survivors of that incident finds an unusual egg, from which a baby turtle hatches. The boy, Toru, raises the creature, quickly realizing it as remarkable in that it hovers and breathes fire. The creature quickly outgrows the house, is relocated by Toru and his friends to maintain secrecy, and then disappears.
Three thousand years ago, an Aztec warlord named Yaotl and his four generals discover a portal opening into a parallel universe which is said to have great power. Yaotl becomes immortal but at a high price, as his four generals were turned to stone. The portal releases thirteen immortal monsters that destroy his army as well as his enemies. In the present, the Teenage Mutant Ninja Turtles have grown apart. After defeating the Shredder, Master Splinter has sent Leonardo to Central America for training. Donatello works as an IT specialist, Michelangelo works as a birthday party entertainer called Cowabunga Carl and Raphael works at night as a vigilante nicknamed Nightwatcher. April O'Neil operates a company that locates and acquires relics for collectors with the help of her boyfriend, Casey Jones.
A young pizza delivery boy named Keno inadvertently encounters burglars on his route and tries to stop them. Seeing him as a witness, the burglars attack Keno, who proves to be an expert martial artist, but he is soon overwhelmed before the arrival of the Ninja Turtles. They vanish after rescuing Keno, taking the pizza he was delivering and leaving money to pay for it.
Sammy, a Green sea turtle, hatches on a deserted beach and while trying to climb up a sand slope is caught by a seagull. He manages to escape along with another hatchling sea turtle caught by a seagull named Shelly. Sammy falls onto an old raft and gets carried into the open ocean, losing Shelly. Later he befriends a leatherback hatchling named Ray. The two friends grow up together.
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The film starts with an animated sequence, showing an anthropomorphic turtle walking down a road, while picking up a flower and smelling it. A chorus sings the Duck and Cover theme:
Après son évasion de prison, Shredder s'allie avec le savant fou Baxter Stockman et deux hommes bêtes et costauds, Bebop et Rocksteady. Grâce à un puissant mutagène violet, ces deux derniers sont transformés en monstres ressemblant à un phacochère et un rhinocéros. De leur côté, les Tortues sont toujours aidées par April O'Neil, Vern Fenwick et un nouveau venu, le justicier hockeyeur masqué Casey Jones, pour contrecarrer ses plans. Cependant, ils doivent très vite faire face à une menace encore plus grande : Krang.