Ep. 17: Earth's Strongest Robot / The Rise of Pluto
Aired on August 3, 2003

17
Robot Pluto, built solely for combat, seeks to become the world's strongest by defeating other machines. His ultimate target is Atom, though Dr. Tenma orchestrates these encounters to test Atom's capabilities. Atom refuses to fight and questions the necessity of robotic violence, planting seeds of doubt in Pluto’s programming. Pluto later meets Uran, whose song fosters unexpected emotional growth within him. Despite Uran’s initial fear, she recognizes his kindness. However, Atom mistakenly believes Pluto harmed Uran, leading to a final confrontation between the two robots.
Episodes
- Ep. 13 · Uran's birth and her discovery of a mysterious pterosaur robot in the night sky.
- Ep. 14 · Mini-Atom enters Uran's body to fight a memory-destroying microbot while Dr. Minimini plots to steal Atom's empty shell.
- Ep. 15 · Defend the Artificial Intelligence! / Only a Machine
- Ep. 16 · Robots are abducted by other robots, leading Atom and his squad to an artificial island.
- Ep. 17 · Earth's Strongest Robot / The Rise of Pluto
- Ep. 18 · Pluto remains immortal while Acheron falls in a battle of wits and power
- Ep. 19 · Atom and Tatsuo face a rocket explosion as Tatsuo attempts to rescue his mother Erika.
- Ep. 20 · Atom and Tommy investigate the disappearance of children who visited Neverland to avoid aging.
- Ep. 21 · Yuuko and Atom investigate Dragon Lake for illegal dumping and environmental destruction.