Episode 18

'''You Are a Special Animal! Gaimon and His Wonderful Friends' is the eighteenth episode of the One Piece'' anime.

Short Summary
With Usopp now in the crew and a new ship, the Going Merry, under their command, the Straw Hat Pirates head to an island said to hold a fabled treasure, only to encounter a strange man stuck in a treasure box named Gaimon that has also been looking for this treasure.