Ganzack is named after the word "zangyaku" ("cruel").
Especially created for the 1998 Jump Super Anime Tour. Ran as promotional triple-feature with HUNTER x HUNTER and Seikimatsu Leader Den Takeshi.
In 1999, Japanese readers of Shonen Jump could send away for a VHS copy of this OAV in exchange for a coupon printed in Shonen Jump and ¥500 shipping and handling.
Wataru Takagi, Takkô Ishimori and Ikuya Sawaki, who appear in this feature as Zoro, Skid and Herring, would later appear in One Piece (1999) playing different characters (Bellamy, Sengoku and Fujitora).