Gridknight Fight (グリッドナイトファイト Guriddonaito Faito) is a live-action spin-off of SSSS.DYNAZENON featuring Gridknight. Each episode of this 4-episode series will be released as bonus features in each of the four SSSS.DYNAZENON DVD and Blu-ray box set releases. It adopts the style of film-making seen in the original Ultra Fight and more contemporary series such as Sevenger Fight, as opposed to the more conventional giant hero tokusatsu means.
- Gridknight (グリッドナイト Guriddonaito): Kenichi Suzumura (鈴村健一 Suzumura Ken'ichi)
- The 2nd (２代目 Ni-daime): Karin Takahashi (高橋花林 Takahashi Karin)
- Alexis・Kerib (アレクシス・ケリヴ Arekushisu Kerivu): Tetsu Inada (稲田 徹 Inada Tetsu)
- Nanashi B (ナナシB Nanashi B Stock Roars): Reina Ueda (上田麗奈 Ueda Reina)
- Narration: Hiroshi Kamiya (神谷浩史 Kamiya Hiroshi)