One Piece S00 E10 Episode of Merry: The Tale of One More Friend

"Set sail for One Piece!"

During a lull in their travel, the Straw Hats are milling around the Thousand Sunny. Usopp, Chopper, and Brook head out to explore the surrounding ocean in the Mini Merry II. Brook asks about the Merry, since he joined after the crew had acquired the Sunny.