One Piece: 1x18
You're the Weird Creature! Gaimon and His Strange Friends!
With Usopp now in the crew and a new ship, the Going Merry, under their command, the Straw Hats head to an island said to hold a fabled treasure, only to encounter a strange man stuck in a treasure box that has also been looking for this treasure.
1 - 1I'm Luffy! The Man Who Will Become the Pirate King! Oct. 20, 1999
1 - 2The Great Swordsman Appears! Pirate Hunter, Roronoa Zoro Nov. 17, 1999
1 - 3Morgan VS Luffy! Who's This Beautiful Young Girl? Nov. 24, 1999
1 - 4Luffy's Past! The Red-haired Shanks appears Dec. 08, 1999
1 - 5Fear, Mysterious Power! Pirate Clown Captain Buggy! Dec. 15, 1999
1 - 6Desperate Situation! Beast Tamer Mohji vs Luffy! Dec. 29, 1999
1 - 7Grand Duel! Zoro the Swordsman vs Cabaji the Acrobat! Dec. 29, 1999
1 - 8
1 - 9The Honorable Liar? Captain Usopp! Jan. 12, 2000
1 - 10The Weirdest Guy Ever! Jango the Hypnotist! Jan. 19, 2000
1 - 11Expose the Plot! Pirate Butler, Captain Kuro! Jan. 26, 2000
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1 - 13The Terrifying Duo! Meowban Brothers vs. Zoro! Feb. 09, 2000
1 - 14Luffy Back in Action! Miss Kaya's Desperate Resistance! Feb. 16, 2000
1 - 15Beat Kuro! Usopp the Man's Tearful Resolve! Feb. 23, 2000
1 - 16Protect Kaya! The Usopp Pirates' Great Efforts! Mar. 01, 2000
1 - 17Anger Explosion! Kuro vs. Luffy! How it Ends! Mar. 08, 2000
1 - 18
1 - 19The Three-Sword Style's Past! Zoro and Kuina's Vow! Mar. 22, 2000
1 - 20Famous Cook! Sanji of the Sea Restaurant! Apr. 12, 2000
1 - 21Unwelcome Customer! Sanji's Food and Ghin's Debt! Apr. 12, 2000
1 - 22The Strongest Pirate Fleet! Commodore Don Krieg! Apr. 26, 2000
1 - 23Protect Baratie! The Great Pirate, Red Foot Zeff! May. 03, 2000
1 - 24Hawk-Eye Mihawk! The Great Swordsman Zoro Falls At Sea! May. 10, 2000
1 - 25
1 - 26Zeff and Sanji's Dream! The Illusory All Blue! May. 24, 2000
1 - 27
1 - 28I Won't Die! Fierce Battle, Luffy vs. Krieg! Jun. 07, 2000
1 - 29
1 - 30Set Sail! The Seafaring Cook Sets Off With Luffy! Jun. 28, 2000
1 - 31
1 - 32Witch of Cocoyashi Village! Arlong's Female Leader! Jul. 19, 2000
1 - 33Usopp Dead?! When is Luffy Going to Make Landfall?! Jul. 19, 2000
1 - 34Everyone's Gathered! Usopp Speaks the Truth About Nami! Jul. 26, 2000
1 - 35Untold Past! Female Warrior Bellemere! Aug. 02, 2000
1 - 36Survive! Mother Bellemere and Nami's Bond! Aug. 09, 2000
1 - 37Luffy Rises! Result of the Broken Promise! Aug. 16, 2000
1 - 38Luffy in Big Trouble! Fishmen vs. The Luffy Pirates! Aug. 23, 2000
1 - 39Luffy Submerged! Zoro vs. Hatchan the Octopus! Aug. 30, 2000
1 - 40Proud Warriors! Sanji and Usopp's Fierce Battles! Sep. 06, 2000
1 - 41
1 - 42Explosion! Fishman Arlong's Fierce Assault From the Sea! Sep. 27, 2000
1 - 43End of the Fishman Empire! Nami's My Friend! Sep. 27, 2000
1 - 44
1 - 45Bounty! Straw Hat Luffy Becomes Known to the World! Oct. 25, 2000
1 - 46Chase Straw Hat! Little Buggy's Big Adventure! Nov. 01, 2000
1 - 47The Wait is Over! The Return of Captain Buggy! Nov. 08, 2000
1 - 48
1 - 49Zoro's New Swords and the Woman Sergeant Major! Nov. 22, 2000
1 - 50Usopp vs. Daddy the Parent! Showdown at High! Nov. 29, 2000
1 - 51Fiery Cooking Battle? Sanji vs. The Beautiful Chef! Dec. 06, 2000
1 - 52
1 - 53The Legend Has Started! Head for the Grand Line! Jan. 10, 2001
1 - 54Precursor to a New Adventure! Apis, a Mysterious Girl! Jan. 17, 2001
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1 - 56Eric Attacks! Great Escape From Warship Island! Jan. 31, 2001
1 - 57
1 - 58Showdown in the Ruins! Tense Zoro vs. Eric! Feb. 21, 2001
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1 - 60
1 - 61An Angry Showdown! Cross the Red Line! Mar. 07, 2001