When we think of "One Piece", we immediately assume this premise "'The Crew is sailing somewhere, cross roads and trade blows with the antagonist in the middle of their nefarious plans, the Crew decides to derail said plans by fighting him and his henchman with Luffy punching out the final villain'.
Story: In contrast to other films before or since then, it is willing to deconstruct things like Nakama and show how it can be easily broken apart.
Art: The looks of the characters may look below for the series, but it proves to be necessary in evoking how there is a dark and ugly
secret hidden on this island.
Sound: There was more effort in utilizing the soundtrack to evoke the mood of the scenes like humor, frustration, mystery and especially horror.
Characters: The highlight of this film. Where interations that turn hilarious in the beggining, turn out to be twisted manipulations done by the villain Baron Omatsuri. Who rivals Doflamingo in terms of evil and terror, while still retaining sympathetic elements that are cleverly revealed at the end of of the story.
Enjoyment: The first act may be hard to digest for it's unusual art direction, but it pays off in the second and third acts of the film.
Overall: A forgotten jewel within the list of One Piece films, that deserves a viewing for the sake of quality at the time.