Gravion, Gonzo tarafından üretilen bir anime televizyon dizisidir. Japonya'da 7 Ekim 2002'den 16 Aralık 2002'ye kadar yayınlanmış ve 13 bölüm sürmüştür. 2004'te Gravion Zwei yayınlandı ve 8 Ocak'tan 25 Mart'a kadar Japonya'da on iki bölüm daha yayınlanarak ilk seride ortaya çıkan sorulara cevap verdi.

Hem Gravion hem de Gravion Zwei, Kunio Okawara'nın mecha tasarımlarıyla Masami Ōbari tarafından yaratılmış ve yönetilmiştir. Her iki seri de Amerika Birleşik Devletleri'nde ADV Films tarafından yayımlanmıştır.

Gravion

The team-up between Kyuukyuu Sentai GoGoFive and Seijuu Sentai Gingaman. Its footage was used in the Power Rangers Lightspeed Rescue episodes Trakeena's Revenge parts I & II.

Kyuukyuu Sentai GoGoFive vs Gingaman

A masochistic mobster meets his match in the dark streets of Tokyo. His nemesis, Ichi, is a psychopathic killer with an unrelenting thirst for bloodshed. A horrifying secret burns in his mind, and his hands deal death without mercy. At last, the shrouds of mystery are parted to reveal the origin of the monster. The city will know its greatest fear at the unveiling of Ichi the Killer.

Ichi the Killer: Episode Zero

On her day off, Tessa wakes up in her commander chair. After regaining her composure, she notices that her favorite stuffed animal is missing and thus tries to remember what actually transpired the night before. To do so, she will spend time with all the main characters of the Danaan crew, and eventually recalls the events of the previous night.