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What is the plot?
Sixty-five million years ago, a massive meteorite slams into Earth and, in the impact's aftermath, reality cleaves into two parallel dimensions. A group of dinosaurs slips through into the newly created realm and, over millennia, evolves into a humanoid society that builds a sprawling metropolis they call Dinohattan. In 1973, an enigmatic woman appears at a Catholic orphanage in Brooklyn carrying a large egg and a small shard of the meteorite; she leaves both behind. The egg hatches into an infant girl, who grows up in the orphanage as the decades pass.
Twenty years later, Italian-American brothers Mario and Luigi work as plumbers out of a cramped Brooklyn apartment and struggle to compete with construction interests tied to mobster Anthony Scapelli. Scapelli's crews work on a project under the Brooklyn Bridge, and Luigi, attending New York University, meets an archaeology student named Daisy who shows him an excavation she is conducting beneath the bridge for dinosaur remains. While Luigi and Daisy are examining the dig, Scapelli's men deliberately sabotage the site by leaving water mains open. Mario and Luigi rush in to repair the broken pipes and prevent the collapse of the excavation.
That night, henchmen Iggy and Spike--cousins and operatives for President "King" Koopa, the de facto ruler of Dinohattan--kidnap a group of young women from Brooklyn, intending to snatch the princess of the other dimension. The men make a mistake: they seize several girls, among them Mario's girlfriend Daniella, instead of only the princess. Daisy is taken as well. The brothers pursue the kidnappers through an interdimensional portal that appears at the Brooklyn Bridge. They tumble through the rift and emerge in Dinohattan, but their chase fractures when crowds and unfamiliar streets separate them from Daisy. A nightclub bouncer, Big Bertha, snatches Daisy's necklace--the pendant that contains a fragment of the meteorite--and the brothers lose that trace of her.
In Dinohattan, Daisy learns truths about her origins she never suspected. She is descended from the city's dinosaur-heritage lineage and is the missing princess of the parallel realm. Her father, the rightful king of Dinohattan, has been devolved by Koopa--then a general in his army--into a living fungus that has spread throughout the city and become a visible blight across streets and public spaces. Daisy's mother, the queen, had smuggled the infant princess through the portal to Brooklyn when danger threatened; when the portal sealed, the queen is crushed to death during the closure. Daisy reacts to these revelations by clinging to the necklace and the meteorite fragment concealed within it, unaware that the shard can trigger a fusion between the two realities because of her royal bloodline.
Iggy and Spike realize the necklace is missing and that the meteorite piece embedded in it is the key that will allow the dimensions to merge. They conclude that, due to Daisy's lineage, only she can make the two worlds combine. Back in Brooklyn, Scapelli continues moves to dominate local construction; in Dinohattan, Koopa plots a takeover that will reach across dimensions. The Koopa regime uses a device described as a de-evolution gun to manipulate forms and minds; that weapon has been used on dissidents and opponents to reduce or alter them. Toad, a gentle guitarist and former advisor, has been punished for protesting Koopa's rule and punished by devolution into a Goomba, a semi-humanoid dinosaur creature. Toad retains his kindness and his music.
Mario and Luigi, having been brought into the city and separated from Daisy, are captured by local authorities and jailed in Dinohattan's municipal prison. They break out, driving their escape through a sequence of small fights and improvised maneuvers inside the facility, and they set out to find the kidnapped women. As they move through the fungus-corrupted streets, they encounter pockets of the fungal king's influence that, unexpectedly, aid their passage rather than hinder it; the fungal king's presence produces openings and diversions that Mario and Luigi exploit to penetrate the city further. Toad finds them and joins their effort, offering information and an improvised handheld device later in the conflict.
Meanwhile, Daisy attempts to escape from the place where the royal family is held. She gains assistance from Yoshi, a reptilian pet that has been bonded to the royal line and that helps her move through hidden passages and serviceways beneath Dinohattan. Iggy and Spike, having received boosts to their cognitive capacities from exposure to the de-evolution technology--an enhancement that increases their awareness of Koopa's ruthlessness--decide to defect from Koopa's inner circle and help Daisy personally. Their change of allegiance comes after they experience the weapon's effects and recognize that Koopa uses it to manipulate and degrade those he sees as weak. The cousins act on their conscience and assist Daisy's flight.
While Luigi reaches Daisy and extracts her from her captors, Mario locates Daniella and the other Brooklyn women who were abducted in error. Mario fights through several Koopa enforcers in a nightclub where Big Bertha presides as bouncer. He confronts Bertha, struggles with bouncers and nightclub security, and retrieves Daniella and the mistaken captives. During the rescue attempts the brothers coordinate: Luigi guides Daisy through alleyways aided by Yoshi and Iggy and Spike; Mario leads Daniella and the other women out of captivity. Their rescues involve hand-to-hand skirmishes, use of the environment as cover, and the use of the de-evolution technology when adversaries attempt to overpower them.
Koopa's jealous girlfriend Lena plays an active role in the unfolding events. She tries to kill Daisy; she arranges an assassination attempt that fails when Daisy avoids the attack through quick movement and the protection of her allies. Frustrated, Lena manages to steal the meteorite fragment from the necklace during a separate struggle. Lena intends to use the fragment to unseat Koopa and claim power for herself. She sets the fragment into a device and attempts to trigger the fusion of dimensions as a means of toppling her lover. As she initiates the merger, the process reacts violently. The attempt causes Lena to be fossilized; the merger element petrifies her, and she is turned into stone--an instant death as her body hardens and fractures under the forces she tried to wield. The act of trying to combine the realities kills her in that moment.
Koopa, watching power slip from his grasp and seeing factionalism within his ranks, carries his confrontation to Brooklyn itself. He appears in the human city and attempts an overt takeover there, deploying forces through the portal and threatening the people Mario and Luigi know. In Brooklyn, Koopa's presence creates chaos: his followers attempt to seize civic structures, his technology disrupts municipal systems, and he brandishes the threat of the meteorite fragment's power. Daisy and Luigi locate the meteorite shard during a tense sequence in which the fragment sits embedded within a larger piece of the meteorite; the two of them work together to remove the shard from the meteorite's core. Luigi physically pries the piece loose while Daisy steadies it, and when they extract the fragment they cause the dimensional bond to break. The two parallel worlds that had begun to fuse pull apart and the rift closes, undoing the immediate doorway that Koopa had exploited.
Back in Dinohattan, Toad gives Mario and Luigi two compact handheld weapons--devolution devices engineered to reverse evolutions or regress forms--so that they can confront Koopa on equal footing. Mario and Luigi take the devices and pursue the ruler into a final confrontation. They aim the instruments at Koopa and activate them. The devices fire, and Koopa's form collapses outwardly through a rapid sequence of transformations. First the devices regress his form into a massive Tyrannosaurus rex, a primeval predator that thrashes across city streets; rubble falls and Koopa's human intelligence is overwhelmed by the T. rex's instinctive fury. Mario and Luigi persist, continuing to use the devolution technology until the dinosaur form breaks down. The weapons then strip Koopa further back along evolutionary time, turning him into viscous, primordial slime--an amorphous, gelatinous state that eliminates his mobility and ability to coordinate. Mario and Luigi stand over the shapeless residue of his former form as the creature can no longer wage conquest.
As Koopa's hold collapses, those who had been devolved begin to be restored. The fungal form that once housed the king's mind is reversed; Daisy's father is evolved back into his original human-like dinosaur appearance and his faculties return. He resumes his role as the legitimate monarch of Dinohattan and takes visible leadership of the city's recovery. Citizens pour into streets and public squares to celebrate the end of Koopa's regime. In the jubilant throng, they immediately destroy statues, billboards, and any signifiers of Koopa's rule, tearing down images and burning banners that had been erected in his honor.
With Koopa defeated and her father restored, Daisy chooses to remain in Dinohattan as the princess and the heir to its governance. Before making the decision final, she embraces Luigi; the two share a kiss goodbye on the threshold of the portal. Daisy then reopens the gateway between worlds long enough to let Mario and Luigi return to their Brooklyn home. The brothers step through the portal together, leaving Daisy in the care of her restored father and the reconstituted city she is born to rule.
Three weeks later, Mario and Luigi receive public recognition in Brooklyn for their actions. They are lauded as local heroes--neighbors, residents, and city officials praise them and they accept the accolades with the quiet relief of men who have survived a remarkable ordeal. While the brothers settle back into their work and routines, Daisy surprises them by turning up at their apartment. She arrives with an urgent expression and asks for their help on a new mission, indicating that her responsibilities in Dinohattan will draw on their talents again.
In a brief, post-credits exchange, two Japanese businessmen approach Iggy and Spike, who are now free from Koopa's influence and sitting in a modest office together. The businessmen request permission to develop a video game based on the cousins' experiences capturing Daisy, fighting in two dimensions, and confronting Koopa. Iggy and Spike consent and christen the proposed title Super Koopa Cousins, offering their names and a wry smile as the film closes on the prospect of their story being retold in electronic form.
What is the ending?
The ending of The Super Mario Galaxy Movie has Bowser Jr. defeated, Bowser surviving in skeletal form, and Rosalina restored after Peach reaches her in the weapon's core. Mario, Luigi, Peach, Rosalina, and the Lumas then return to the Mushroom Kingdom and begin rebuilding Peach's castle together.
In short, the heroes win the battle, save Rosalina, and stop the power-draining weapon. Bowser is cast down into lava, but he does not remain gone; he returns in a skeletal state, and Bowser Jr. ends up locked up with him by the end of the film.
At the end, the story moves into a quiet but important rebuilding phase. Mario and Luigi come back with Peach, Rosalina, and the Lumas, and the castle is still missing when they arrive. Instead of ending on destruction, the film closes with the characters joining together to rebuild what was lost.
Here is the ending in a more detailed chronological narrative:
Rosalina is still trapped in the core of the weapon, and her energy is draining away. Peach reaches her there and sees that Rosalina is weak and close to death. Peach remembers their shared power and calls out to Rosalina, telling her to press on her hand from her side. The connection works, and Rosalina is recovered by that shared power just moments before she dies. Freed from the weapon, Rosalina survives, and the weapon no longer holds her.
With Rosalina saved, the film shifts to the fate of Planet Bowser. Rosalina and Peach, now reunited, transform Planet Bowser into a clean, nature-filled world. This is the last major act of the story's conflict: the destructive force tied to Bowser's side is undone, and the world itself is changed.
The Lumas gather around Rosalina again after her rescue. They reunite with her, and then they ask to visit Peach's Castle. Mario and Luigi react with dread, because they know the castle is gone. When the group returns to the Mushroom Kingdom, the castle is still completely destroyed. Luigi, looking nervous, tells the Lumas that the castle has just "died." Mario then says that they will rebuild it together, and Rosalina and the Lumas join in. The ending closes on that promise of repair and shared effort.
Bowser's fate is darker but not final. Mario confronts Bowser on a bridge suspended over a lava moat. Bowser is trying to force the battle to continue, and Mario uses one of Bowser's own axes to cut the bridge apart. Bowser falls into the lava below. He survives, but he returns in a skeletal form, becoming Dry Bowser.
Bowser Jr.'s ending is tied directly to that fall. After Bowser is lost in the lava, Bowser Jr. is enraged by what happened to his father. He recovers his brush from Luigi by throwing Dry Bowser's shell at him, and this also defeats Game & Watch in the process. He then creates a replica of the Ruined Dragon. That creature unexpectedly swallows him whole. Mario then uses a Red Star to become Flying Mario and defeats the Ruined Dragon, saving Bowser Jr. from it. By the end of the film, Bowser Jr. is alive, but he is also one of the villains locked up after the defeat.
Mario's ending is active and triumphant. He defeats Bowser by cutting the bridge and later uses the Red Star to transform into Flying Mario to stop the Ruined Dragon and save Bowser Jr. He then returns to the Mushroom Kingdom and helps lead the rebuilding effort with the others.
Luigi's ending is quieter but important. He returns safely with the group, participates in the rebuilding, and is the one who nervously tells the Lumas that the castle "died." He remains with Mario and the others at the end.
Peach's ending centers on rescue and restoration. She finds Rosalina in the core, reaches out to her, and helps save her from dying. Peach then joins Rosalina in transforming Planet Bowser into a healthier world. She returns to the Mushroom Kingdom and helps rebuild the castle afterward.
Rosalina's ending is one of survival and reunion. She is first seen near death while her energy is being drained. Peach restores her through their shared power, and she is freed from the weapon just in time. She then joins Peach in remaking Planet Bowser and later goes with the group back to the Mushroom Kingdom.
The Lumas end the story reunited with Rosalina and involved in the rebuilding of Peach's castle. They are no longer separated from her, and they participate in the final return to the Mushroom Kingdom.
If you want, I can also give this ending again in an even simpler "storybook" style, still scene by scene.
Who dies?
Based on the available results for The Super Mario Galaxy Movie (2026), the only character explicitly described as dying is Rosalina, and even that death is framed as happening "moments" before she would have died, because Peach rescues her in time.
Rosalina: - Circumstances: She is found in the core of Bowser Jr.'s weapon, where her energy is being drained. - Why: Bowser Jr.'s machine is weakening her as part of his attack and captivity. - When: Near the climax of the film, during Peach's rescue mission inside the weapon. - How: She is "slowly dying" from the energy drain, but Peach restores her by sharing power with her; the film description says this happens "moments before her demise," so she does not appear to actually die on-screen.
Bowser is attacked and later survives as Dry Bowser, so he is not listed as dead in the source material provided.
If you want, I can also give you a full death-count style breakdown of every apparent fatality or near-death event mentioned in the movie's plot summary.
Is there a post-credit scene?
Yes, the movie titled Super Mario World (the sequel to The Super Mario Bros. Movie) is expected to have post-credit scenes, continuing the tradition established by the first film. The original Super Mario Bros. Movie (2023) had two post-credit scenes: one mid-credits featuring Bowser singing about his plans for revenge while locked in a cage, and a second post-credits scene showing a green-spotted egg cracking in the Brooklyn sewers, hinting at the arrival of Yoshi, a key character from the Super Mario World game.
For Super Mario World (2026), while detailed plot information is not fully available yet, the title itself was revealed in connection with the post-credit scene of the first movie, which introduced Yoshi's egg. This strongly suggests that the sequel will continue from that scene and likely include its own post-credit scenes to tease further developments or characters, following the pattern of the first film.
In summary, the 2026 Super Mario World movie is anticipated to have post-credit scenes, continuing the franchise's use of these scenes to set up future storylines, though specific details about those scenes have not been publicly disclosed yet.
How does Bowser Jr. capture Rosalina, and why is she so important to his plan?
Bowser Jr. sneaks onto Rosalina's ship, the Comet Observatory, while she is getting ready to read to the Lumas. Rosalina initially tries to protect the Lumas, but that same protective instinct becomes her weakness, and Bowser Jr. captures her. He then reveals that he wants to drain her cosmic powers in order to destroy the universe and fulfill his father's ambition. This makes Rosalina the central target of the story's conflict.
How do Mario, Luigi, Peach, Toad, and Yoshi first end up working together on the rescue mission?
Mario and Luigi meet Yoshi after finding it stuck in a pipe during a mission in a desert town, and Yoshi becomes their new companion. The larger rescue team then forms around Mario, Luigi, Peach, Toad, and Yoshi as they travel into space to stop Bowser Jr. and save Rosalina.
What role does Yoshi play in the movie’s story, and how important is he to the group?
Yoshi is introduced as a new ally when Mario and Luigi discover it trapped in a pipe, and the two befriend it. From that point on, Yoshi joins the adventure across the galaxy and participates in the action alongside Mario, Luigi, Peach, and Toad. The story treats Yoshi as a meaningful new companion rather than a background character.
What happens when Bowser Jr. attacks the heroes on their way to Space Junk Galaxy?
While the group is traveling to Space Junk Galaxy, Bowser Jr. ambushes them with a Super Scope and turns Mario and Luigi into babies. He also causes the Arwing to crash into Fossil Falls, forcing the rescue team to recover and continue the mission after the attack.
How do Peach and Rosalina defeat Bowser Jr. and restore the planet?
Near the end, Peach finds Rosalina in the core of Bowser Jr.'s weapon, where Rosalina is weakening as her energy is drained. Peach reaches her by recalling their shared power, and once Rosalina is recovered, the two reunite and transform Planet Bowser into a clean, nature-filled planet. Their combined power breaks Bowser Jr.'s control and completes the rescue.