From deep within the Earth's surface, the Dinosaur Kingdom make their move to wipe out mankind and conquer the planet with their mechanical dinosaurs. After a prototype Getter Robo is shot down by a mechanical dinosaur, the Saotome Research Institute decides to use the real Getter Robo, which is combat-capable. Due to a lack of pilots in the institute, Ryo Nagare goes to his college to persuade martial artist Musashi Tomoe and outcast Hayato Jin to join him and pilot the Getter Machines to combat the new threat and protect mankind.

[Source: Anime News Network]

Takes place after the final defeat of the Dinosaur Empire and the death of Musashi Tomoe in the original Getter Robo series.

Dr. Saotome, creator of Getter Robo, fears that the peace the Getter Robo team has won will be short lived and that an even greater enemies would appear. Dr. Saotome's fears are justified when the militaristic Hyakki (or "Hundred demons") Empire appears, but Dr. Saotome is prepared with the creation of an even more powerful Getter Robo, Getter Robo G and a new Getter Robo base. Also with Musashi Tomoe dead, Dr. Saotome needs a third pilot which he finds in baseball player Benkei Kuruma.

[Source: Wikipedia]

A new Getter robot is piloted by three youth as they combat the evil terrors that plague the world.

Dr. Saotome returns from the dead after being seemingly murdered by Getter pilot Nagare Ryoma and threatens the world with his ultimate creation: the Shin Dragon. Ryoma reluctantly teams up with his former co-pilots Jin Hayato and Tomoe Mushashi to combat Dr. Saotome. The pilots must also deal with the mysterious Invaders, aliens that have the ability to possess humans and warp their flesh to form hideous creatures.

[Source: Nihon Review]

Years after the defeat of the Reptilian Empire, Getter Team has begun training on a new super robot, Neo Getter Robo. But a surprise attack from the Empire's revived leader forces them to recruit a street fighter named Go Ichimonji as Getter One's pilot. Faced with an enormously powerful foe, the new team's only hope for victory may lie in the resurrection of the lost weapon of humanity, Shin Getter Robo.

[Source: Anime News Network]

Humanity is under attack by demonic creatures called Oni. Unable to fight back by any other means, the scientist Dr. Saotome creates a series of giant robots that harness the mysterious power of Getter Rays, giving them the strength necessary to fight the Oni. The strongest of these is Getter Robo, and Saotome must enlist three very different men to pilot it - martial artist Ryoma Nagare, criminal leader Hayato Jin, and monk Benkei Musashibou. Together, the Getter Team fights to end the Oni menace forever.

[Source: Anime News Network]

The world is on the brink of apocalypse following an onslaught of invaders. To fight the attacking hoard, one of the original Getter Robo pilots, Hayato Jin, has finished Getter Arc, a new fighting unit based on the final work and ultimate masterpiece of Professor Saotome. Now the son of Ryoma – one of Hayato's copilots on the first-generation Getter – Takuma, the half-human half-Saurian Kamui, and Baku, younger brother of the extraordinary ESPer Tahir, step aboard the Getter Arc to combat the ruthless incursion and restore hope to their ravaged world!

[Source: Sentai Filmworks]