While Luffy and his crew of Zoro and Nami are starving on their small boat, they are attacked by a large monster. Nami is taken away, while Luffy and Zoro wash up on shore. There they meet a young girl, Medaka, and learn of the sad history of the island. The evil Pirate Ganzack has taken away all the men in the village and enslaved them, including Medaka's father. Now Luffy, Zoro, and Medaka must infiltrate Ganzack's base in order to rescue the villagers and Nami.
Unfortunately the movie One Piece: Defeat the Pirate Ganzack! is not yet available on HBO Max.
| Directing | Goro Taniguchi | Director |
| Production | Hidekazu Terakawa | Producer |
| Production | Tetsuo Otoku | Producer |
| Writing | Hiroaki Kitajima | Writer |
| Visual Effects | Isao Sugimoto | Key Animation |
| Visual Effects | Fumiko Yoshida | Key Animation |
| Visual Effects | Hisashi Kagawa | Animation Director |
| Visual Effects | Seiichi Nakatani | Key Animation |
| Visual Effects | Munetaka Abe | Key Animation |
| Visual Effects | Tatsuya Suzuki | Key Animation |
| Visual Effects | Yoshinobu Aohachi | Key Animation |
| Visual Effects | Yasunori Miyazawa | Key Animation |
| Visual Effects | Asako Nishida | Key Animation |
| Visual Effects | Naoya Furukawa | Key Animation |
| Visual Effects | Tooru Yoshida | Key Animation |
| Visual Effects | Masahiko Nakada | Key Animation |
| Visual Effects | Miki Yoshikawa | Key Animation |
| Visual Effects | Tsutomu Nishiyama | Key Animation |
| Visual Effects | Masahiko Itojima | Key Animation |
| Visual Effects | Tatsufumi Itoh | Animation Director |
| Visual Effects | Yoshihiko Umakoshi | Key Animation |
| Visual Effects | Masayuki Sato | Key Animation |
| Visual Effects | Yutaka Nakamura | Key Animation |
| Visual Effects | Shigeyuki Suga | Key Animation |
| Visual Effects | Takuya Suzuki | Key Animation |
| Visual Effects | Hiroshi Shimizu | Key Animation |
| Visual Effects | Toshihiko Fukano | Key Animation |
| Visual Effects | Atsushi Hasebe | Key Animation |
| Visual Effects | Ken Ootsuka | Key Animation |
| Visual Effects | Takayuki Hamana | Key Animation |
| Visual Effects | Kaori Higuchi | Key Animation |
| Visual Effects | Motoki Yagi | Key Animation |
| Visual Effects | Mamoru Sasaki | Key Animation |
| Visual Effects | Kazunobu Hoshi | Key Animation |
| Visual Effects | Masahiro Sekino | Key Animation |
| Visual Effects | Hiroshi Yatsuka | Key Animation |
| Visual Effects | Hiroyuki Nakamura | Key Animation |
| Writing | Goro Taniguchi | Writer |
| Sound | Hideyuki Tanaka | Sound Director |
