| Title | Season | Episode # | First Aired |
|---|---|---|---|
| One Piece OVA: Defeat the Pirates Ganzack!!! | 1 | 0 | |
| 1 | 1 | 1 | |
| I'm Gonna Be King of the Pirates! | 1 | 1 | Saturday September 18, 2004 |
| Roronoa Zolo: The Pirate Hunter | 1 | 2 | Saturday September 25, 2004 |
| An Unlikely Pair: The Pirate and the Pirate Hunter | 1 | 3 | Saturday October 2, 2004 |
| The Passing of the Hat | 1 | 4 | Saturday October 9, 2004 |
| The Circus Comes to Town | 1 | 5 | Saturday October 16, 2004 |
| The Beast Breaker | 1 | 6 | Saturday October 23, 2004 |
| The Desperate Duel | 1 | 7 | Saturday October 30, 2004 |
| Who Gets the Last Laugh? | 1 | 8 | Saturday November 6, 2004 |
| The Teller of Tales | 1 | 9 | Saturday November 13, 2004 |
| The Bluff and the Bluffer | 1 | 10 | Saturday November 20, 2004 |
| The War at the Shore | 1 | 11 | Saturday November 27, 2004 |
| The Black Cat Pirates | 1 | 12 | Saturday December 4, 2004 |
| Good Pirates vs. Bad Pirates | 1 | 13 | Saturday December 11, 2004 |
| The Purr-Fect Plan | 1 | 14 | Saturday December 18, 2004 |
| The Long Arm of the Claw | 1 | 15 | Saturday January 8, 2005 |
| The Cat's Ninth Life | 1 | 16 | Saturday January 15, 2005 |
| The Scrub in the Shrub | 1 | 17 | Saturday January 22, 2005 |
| Zolo's Pledge | 1 | 18 | Saturday January 29, 2005 |
| King of the Busboys | 1 | 19 | Saturday February 5, 2005 |
| Respecting Sanji | 1 | 20 | Saturday February 12, 2005 |
| Recipe for Disaster | 1 | 21 | Saturday February 19, 2005 |
| The Red Footed Pirate | 1 | 22 | Saturday February 26, 2005 |
| The Better Swordman | 1 | 23 | Saturday March 5, 2005 |
| Pearl Jam | 1 | 24 | Saturday March 12, 2005 |
| Stranded | 1 | 25 | Saturday March 19, 2005 |
| Here We Go A Ghin | 1 | 26 | Saturday March 26, 2005 |
| Blitz Krieg | 1 | 27 | Saturday April 2, 2005 |
| The Crack of Don | 1 | 28 | Saturday April 9, 2005 |
| New Crew | 1 | 29 | Saturday April 16, 2005 |
| The Mermen | 1 | 30 | Saturday April 23, 2005 |
| The Thief With a Heart of Gold | 1 | 31 | Saturday April 30, 2005 |
| The Marked Marksman | 1 | 32 | Saturday May 7, 2005 |
| It Takes a Thief | 1 | 33 | Saturday May 14, 2005 |
| The Belle of the Brawl | 1 | 34 | Saturday May 21, 2005 |
| You Dirty Rat! | 1 | 35 | Saturday May 28, 2005 |
| War of the Species | 1 | 36 | Saturday June 4, 2005 |
| Arms Against Arms | 1 | 37 | Saturday June 11, 2005 |
| The Comeback Kid | 1 | 38 | Saturday June 18, 2005 |
| Wanted! | 1 | 39 | Saturday June 25, 2005 |
| Roguetown | 1 | 40 | Saturday July 2, 2005 |
| Switched Blades | 1 | 41 | Saturday July 9, 2005 |
| Sanji Sizzles | 1 | 42 | Saturday July 16, 2005 |
| Buggy's Back | 1 | 43 | Saturday July 23, 2005 |
| Fantastic Voyage | 1 | 44 | Saturday July 30, 2005 |
| Baroque Works | 1 | 45 | Saturday August 6, 2005 |
| Luffy vs. Zolo | 1 | 46 | Saturday August 13, 2005 |
| Escape From Misty Peak | 1 | 47 | Saturday August 20, 2005 |
| Saving Nami | 1 | 48 | Saturday August 27, 2005 |