Haruko Kitahama

The heroes of the series Mazinger Z and Devilman fighting against the evil Demon Clan. (myanimelist.net)

Episode 57 "Dr. Hell Occupies Japan" of the original TV show, shown as a movie. (myanimelist.net)

5000 years ago, evil demigod Poseidon and his minions attack the good mermen. A dolphin saves one of them, baby Triton. Later, as a young boy, Triton decides to avenge his family and end the reign of evil Poseidon and his monsters.

Kozue is a high school girl and an enthusiastic volleyball player. Her dream is to play on the Japanese national volleyball team. Over the course of the series she makes it from the school district league up to the Japanese volleyball finals, step by step until the international volleyball championship. But the faster and higher Kozue climbs, the more she is confronted with the dark side of success: too-high expectations, self-conceit, and envy.

In a far distant future, professor Hayashi is trying to alert the world to an alien invasion, but is being ridiculed instead. Saved by four dogs his son Tsutomu befriended, the professor transforms the four dogs into cyborgs with incredible abilities. Led by Tsutomu; Queen, Ace, Jack, and Joker will together fight the alien menace.

Earth is invaded by the Izaru people and Doctor Kazuki builds a robot who's pilots joint bodies in a metallic plate locking itself on the Gakeen robot's frame thus enabling the super robot to move and fight.