[AniMecha] Great Dangaioh [Dual Audio English & Japanese][English Sub][Haja Kyosei G Dangaiou][2001]

Plot:

After a decade of silence, the Dangaioh Legend Continues:
A mysterious explosion on Futagami Island begins a new chapter in the Dangaioh mythos! Led by the evil Professor Katou, a band of warriors calling themselves the "Tartarus Knights" have begun their campaign to lay waste to the world by way of a small research station on Futagami Island. Katou's victory seems almost certain until he encounters an advanced fortress guarding the island. From it, a group of three humanoid robots are launched - Dangaioh!