Professor Leopold, who has appealed to stop a construction project that is destroying nature in the Basin Valley, fakes his own death he tries to stop the construction wearing a cat mask as a disguise Astro reveals his identity.
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After many rounds, Ippo and Volg are both exhausted after the match is finished, Volg visits Ippo in the hospital and meets Ippo's mother.
The fight between Ippo and Volg carries on. Ippo takes a lot of hits and gets knocked down a couple of times.
The match with Ippo and Volg begins.
Ippo meets Volg after Volg gets lost Volg tells Ippo that he boxes so he can get money for his mother.
Aoki and Kimura fight their matches Kamogawa wants Ippo to train his legs to get flexible muscles so that he can deliver a more powerful punch that can beat Volg.
Kurei will go to sinister lengths to discover immortality's secrets.
Recca finds a kindred spirit in the new history teacher, who knows all about the ninja of the past his visit to the teacher's home, however, goes wrong when enemies show up to kidnap Yanagi.
Recca's friends try to bring him out of a deep melancholy.
Dangerous truths come to the surface when Recca and Domon save a life.
Recca makes a major declaration.
Recca Hanabisihi, the son of a fireworks maker, may be the next in line of a series of legendary ninja warriors.
It is down to the final battle Kurei vs. Recca.
Koganei squares off against Kurei, but the fight doesn't go quite as expected.
After finding a large metallic meteor-like object that turns out to be a mass of metal parts, Astro puts the pieces together and builds a giant robot.
Astro fights off sharks and a submarine belonging to Mandrake when he visits an undersea farm where the mermaid robot Peppy works.
Atlas, who has been released from ice by Vivian, causes a subway train to go out of control to lure Astro out and challenge him.
While on school field trip to a comet, Astro Boy and classmates are kidnapped by Atlas.
The Donohues and the Cavalets have been enemies for generations their racing teams are rivals and their robot brothers are opposed to each other Robio of the Donohues and Robiette of the Cavalets fall in love Astro participates in the race.
During a New Year's celebration, Dr. Elephant presents Uran Uran gets involved with a villain who kidnaps robot children.
Skunk convinces a powerful Frankenstein robot to aid in his crime spree.
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