Kiba Gaiden (呀〈KIBA〉 ～暗黒騎士鎧伝～, KIBA: Ankoku Kishi Gaiden, lit. "Kiba: Dark Knight Side Story") is a spin-off V-Cinema of the GARO television series, set for release on Blu-ray and DVD on September 7, 2011. A limited theatrical release took place on September 3, 2011, in Tokyo's Ikebukuro district and on September 4, 2011, in Osaka's Umeda district at Cine Libre theaters.

Actor and musician Masaki Kyomoto reprises his role as psychologist and counselor Karune Ryuzaki, the disguise for villainous Makai Knight Barago who is later taken over by the Dark Makai Knight Kiba, from the original Garo television series in a film revealing the character's history as well as the character's actions during the television series prior to his final battle. Mika Hijii also reprises her role as Kaoru Mitsuki, the female lead of Garo and one of Ryuzaki's patients who Barago intends to use to revive the Horror Messiah. Singer Leah Dizon joins the cast of Kiba Gaiden as the mysterious woman known as Makai Guide Elda who directs Barago towards his goal.