Regarding "deep piece," this often refers to the community or discussions that dive into the series' complex lore, world-building, and hidden details. Many fans analyze these "filler" episodes for character consistency and thematic connections to the broader narrative, even if they aren't strictly canon. Episode 428 | One Piece Wiki | Fandom
Boss undergoes a sudden transformation, molting his skin to gain a new size and color, which allows him to temporarily free the Straw Hats from their nets. One Piece Episode 428
In , titled "A Special Presentation Related to the Movie! The Fierce Onslaught of the Amigo Pirates," the Straw Hat crew continues their battle against the Amigo Pirates in the Little East Blue filler arc . Key Episode Highlights Regarding "deep piece," this often refers to the
Chronologically, it interrupts the Impel Down Arc to promote the movie, a common practice in the series. In , titled "A Special Presentation Related to the Movie