Toku Nishio

A hard-hitting tale of violent criminals engaged in a brutal turf war, it is easily the best-written and most stylishly directed since the first in the series. This one tells the story of a young Japanese Yakuza who takes over the Russian supply of drugs and weapons to Japan and cuts out the involvement of the Hong Kong-based 108 Dragons. (imdb)

Mankind is threatened by the Megasaur Empire, an advanced civilization of dinosaurs that survived extinction by living underground. In response, Prof. Saotome develops Getta Robo, a 3-in-1 robot formed by three separate vehicles (Getta Machines Eagle, Jaguar, and Bear). Powered by cosmic/getta rays, Getta Robo battles the army of Mechasauruses unleashed by the Empire. (imdb)

When a UFO appears over Japan, both the heroes of Great Mazinger and Getter Robo want to investigate it first, out of a sense of rivalry. Getter finds it first since the Mazinger robot is being repaired. However they are unable to defeat the apparently living vehicle. It had already dropped a metal-eating monster on Japan named Gilgilgan and Great Mazinger confronts it only to be badly beaten. (wikipedia)

When earthquakes shake up Japan, Professor Saotome is certain that it is the work of the Dinosaur Empire. Michiru goes out to investigate in the Command Module but is quickly shot down and injured; the culprit is none other than Megazaus! Team Getter Robo is eager to get revenge for Michiru, but first they have to brave the fractured roads and find a physician for her. Once Getter Robo is formed, they must track Megazaus underground and defeat him before he destroys the cities of Japan. (myanimelist.net)

Travelling in the spaceship "Space Colony", Nick, with the help of his ball-shaped robot "Ball Boy", arrive on Earth to study the behaviour and manners of human beings for his doctoral degree thesis. Under the human identity of a young man named Ken Takase, he meets Maki Hayama, a photographer at Shukan Hit newspaper, and later saves her from a building fall. Maki was taking pictures for a scoop about a building which had been mysteriously demolished. (wikipedia)

Dr. Raichi, a survivor of the Tuffle race that was eliminated from Planet Vegeta by the Saiyans, is trying to take revenge on the surviving Saiyans by killing them and Earth's population. Goku, Gohan, Piccolo, Trunks, and Vegeta must find and destroy generators emitting deadly Destron Gas before all life on Earth is extinguished, then find Raichi and stop him. (imdb)