Super Robot Retsuden is a 2002 Humongous Mecha manga written and illustrated by Ken Ishikawa, featuring Dynamic Planning's most famous Humongous Mecha: Mazinger Z, Great Mazinger, UFO Robo Grendizer, Getter Robo and Kotetsu Jeeg.
An alien lifeform named Varon approaches Earth, looking to destroy human civilization. Kouji Kabuto and his allies have to team up to fight off Varon and its massive monsters called Meteor Beasts.
This manga provides examples of the next tropes:
- Affectionate Parody: The story parodies The '70s Toei Animation crossover movies.
- Big Bad: Varon the Annihilator all life on Earth.
- Breath Weapon: Meteor Beast D'Gorah's mouth fires energy blasts.
- Crossover: Mazinger Z, Great Mazinger, UFO Robo Grendizer, Getter Robo and Kotetsu Jeeg.
- Diabolus ex Nihilo: Valor's origins are never revealed.
- Eldritch Abomination: Valor is a massive, non-humanoid monster that hails across the space void, exterminating sentient civilizations.
- Generic Doomsday Villain: Valor has no past, background or motivations other than being an omnicidal maniac. This is intentional on Ishikawa's part.
- Heroic Sacrifice: Jeeg pulls one off to destroy Valor; luckily, he survives.
- Hot-Blooded: All pilots are passionate and enthusiastic.
- Hot Blooded Sideburns: Kouji's sideburns are long and spiky. Ryoma and Hiroshis are huge and bushy.
- Humongous Mecha: In addition to the canonical giant robots, a giant Transforming Mecha turns up during the Final Battle.
- Lava Adds Awesome: In the second chapter, the Monster of the Week causes Mount Fuji to erupt.
- Meta Mecha: In the Final Battle, the five lead robots pilot a Transforming Mecha.
- Our Dragons Are Different: D'Gorah is a shape-shifting, serpent-like, beaked lava dragon that can vomit massive fire blasts.
- Robeast: The Meteor Beasts.
- Rocket Punch: All robots are equipped with a type of missile punch.
- Spotlight-Stealing Squad: Ishikawas own creations, Getter Robo and Getter Robo G, receive most of screen time.
- Turned to Stone: A Meteor Beast is armed with some kind of petrifying gas.
- Wave-Motion Gun: D'Gorah's shoots massive energy blasts.