Astro is a robotic boy created by Dr. Tenma to replace his late son. When Tenma destroys his laboratory and shuts down Astro, the Ministry of Science revives him and tries to give him a normal life as a 6th-grade student who occasionally helps keep renegade robots from causing harm.
| Title | Time | |
|---|---|---|
| 1 | Power Up! | 2003-04-06 |
| 2 | Rocket Ball | 2003-04-13 |
| 3 | Destination Deimos | 2003-04-20 |
| 4 | Into Thin Air | 2003-04-27 |
| 5 | Rainbow Canyon | 2003-05-04 |
| 6 | Birth of Atlas | 2003-05-11 |
| 7 | Astro Vs. Atlas | 2003-05-18 |
| 8 | Neon Express | 2003-05-25 |
| 9 | Franken | 2003-06-01 |
| 10 | The Venus Robots | 2003-06-08 |
| 11 | Robot Circus | 2003-06-15 |
| 12 | Reviving Jumbo | 2003-06-22 |
| 13 | Little Sister, Big Trouble | 2003-07-06 |
| 14 | Micro Adventure | 2003-07-13 |
| 15 | Only a Machine | 2003-07-20 |
| 16 | Robot Hunters | 2003-07-27 |
| 17 | The Rise of Pluto | 2003-08-03 |
| 18 | The Fall of Archeron | 2003-08-10 |
| 19 | Robot Boy | 2003-08-17 |
| 20 | Dawn of the Techno-Revolution | 2003-08-24 |
| 21 | Dragon Lake | 2003-08-31 |
| 22 | The Legend of Tohron | 2003-09-07 |
| 23 | Lost In Outland | 2003-09-14 |
| 24 | March of the Micro Bears | 2003-09-21 |
| 25 | Deep City | 2003-09-28 |
| 26 | The Blue Knight | 2003-10-05 |
| 27 | Old Dog, New Tricks | 2003-10-12 |
| 28 | Hydra-Jacked | 2003-10-19 |
| 29 | The Case of the Phantom Fowl | 2003-10-26 |
| 30 | Geo-Raider | 2003-11-02 |
| 31 | Gideon | 2003-11-09 |
| 32 | The Secret of Blue Knight | 2003-11-16 |
| 33 | Fairy Tale | 2003-11-23 |
| 34 | Shape Shifter | 2003-11-30 |
| 35 | Firebird | 2003-12-07 |
| 36 | Space Academy | 2003-12-14 |
| 37 | Atlas Strikes Back | 2003-12-14 |
| 38 | Battle-Bot | 2003-12-28 |
| 39 | Time Hunters | 2004-01-11 |
| 40 | Escape from Volcano Island | 2004-01-18 |
| 41 | Avalanche | 2004-01-25 |
| 42 | Battle of Steel Island | 2004-02-01 |
| 43 | Undercover | 2004-02-08 |
| 44 | Into the Dragon's Lair | 2004-02-15 |
| 45 | Night Before the Revolution | 2004-02-22 |
| 46 | Robotonia | 2004-02-29 |
| 47 | Showdown in Robotonia | 2004-03-07 |
| 48 | Journey to Tomorrow | 2004-03-14 |
| 49 | Astro Reborn | 2004-03-21 |
| 50 | The Final Battle | 2004-03-28 |
