Choujuu Kishin Dancougar: Ushinawareta Mono-tachi e no Requiem

超獣機神ダンクーガ 失われた者たちへの鎮魂歌（レクイエム）

The Dancouga team prepares for its final showdown with their arch-enemy Zorbados. The team has to travel to the strange dimension of the alien invaders to once and for all save the earth. Fighting on the home-grounds of the enemy will take all their strength and cunning. The Dancouga will have to fight its way to the strange alien red dimension before it can start its final assault and assure the safety of mankind forever.

(Source: Anime-Planet)