Astro Boy

In the 22nd century, Toby Tenma is a teenager who lives in the futuristic city-state of Metro City, which floats above the polluted Earth. His father, Dr. Tenma, works at the Ministry of Science, alongside Dr. Elefun. Under orders of President Stone, who is running for re-election, they have created the Peacekeeper, an advanced defensive robot fueled by two powerful energy spheres with opposite properties, respectively in the colors blue and red, from a star fragment discovered by Elefun. Against the scientists' warnings, Stone loads the negative red core into the Peacekeeper, causing it to become hostile and indirectly kill Toby while attempting to violently leave the research facility before Elefun disables it. Heartbroken, Tenma makes a robot programmed with Toby's memories, along with built-in defenses, including flight and the ability to understand silent robots. Powered by the positive blue core, the robot activates and believes himself to be Toby. Though the robot has Toby's memories and a similar personality, Tenma realizes nothing could replace the original Toby and rejects him. Stone has his forces pursue Toby in an effort to retrieve the blue core, leading to him falling off Metro City's edge when Stone's flagship blasts him. Afterwards, Tenma escapes arrest by agreeing to disable Toby and give up the blue core. Toby awakens in an enormous junkyard populated by robots dumped from Metro City. He meets a group of orphaned children—Zane, Sludge, Widget, and Cora—accompanied by a dog-like robot named Trashcan, and the Robot Revolutionary Front (RRF) members Sparx, Robotsky, and Mike the Fridge, who plan to free robots from mankind's control, but are very inept and bound by the Laws of Robotics. While attempting to recruit him for their cause, they rename Toby "Astro". Hamegg, the former head of the Ministry of Science and caretaker of the orphans, takes Astro in. The next day, Astro comes across an old, offline construction robot named Zog, whom he reactivates through sharing some of the blue core's energy. After restoring Zog, Astro has a heart-to-heart with Cora, discovering that Cora is from Metro City, having run away from home, but is regretful of her decision out of love for her parents. Later, Hamegg, having secretly discovered Astro is a robot, knocks him out with an electric blaster to use him in his robot arena, the Robot Games, before publicly acknowledging Astro's true self. Astro defeats Hamegg's fighters until Zog gets deployed. The two robots refuse to fight due to their friendship and Hamegg tortures Astro. Zog, who predates the Laws of Robotics, almost kills Hamegg before Astro saves him. Moments later, Stone's forces arrive to take Astro back to Metro City, and he willingly surrenders himself. Astro reunites with Tenma and Elefun, and the former disables him. Realizing that he loves Astro as much as Toby, Tenma steals back the core, and stalls Stone long enough to reactivate and free Astro. Outraged, Stone powers up the Peacekeeper with the red core, commanded to destroy Astro and return with the blue core: the Peacekeeper instead absorbs Stone and many other objects, growing to a gargantuan size. Stone gains control of the fusion and goes on a rampage, prompting Astro to return to Metro City to battle the Peacekeeper. In the ensuing fight, Metro City's power station gets destroyed and causes it to fall. Astro uses his superhuman strength to help Metro City land safely. The Peacekeeper tries absorbing Astro to get his blue core using the red core, but are separated due to the cores' repulsive reactions. Tenma tells Astro that the cores will violently destroy each other on contact, thus, killing them both. The Peacekeeper captures Astro's friends from the junkyard, who were searching for him, and he shares a farewell with his father before flying into the Peacekeeper's core, sacrificing himself to destroy it. Stone survives and is arrested. As Elefun and the children find a destroyed Astro, Zog revives him with a surge of blue core energy. Reunited with his friends and father, Astro is hailed as a hero, while Cora is finally reunited with her parents. When a monstrous extraterrestrial soon after attacks Metro City, Astro leaps into action.

Plot from Astro Boy (film)CC BY-SA 4.0