A guide to the One Piece anime series has been published, outlining which episodes are part of the main storyline and which are filler episodes that can be skipped. The guide appears to list every episode that is not essential to the plot, allowing viewers to skip them without missing key elements of the story. However, it is unclear if the guide is universally agreed upon, as similar guides for other anime series, such as Naruto and Bleach, are also available.