Here we see the Robeast in the wild competing with its only natural predator, the Super Robot.

The standard Monster of the Week for Super Robots and Super Sentai/Power Rangers.

A Robeast is a Kaiju-sized monster, more often than not the same size as the Super Robot that battles it, though Robeasts in Sentai and Toku may also start in human size, so as to be a threat on a personal scale, then grows through some form of Applied Phlebotinum.

Robeasts are rarely capable of human-level intelligence or communication, and even when they are, they usually prefer to just roar instead.

Robeasts are usually built with both biological and mechanical construction (though some are also completely mechanical, magical constructs, giant demons, and the like). They come in a dizzying variety of shapes, abilities, and weapons, and very rarely will any two robeasts look alike, even between robeasts deployed by the same villain(s). Many of them avoid humanoid designs and mook status, becoming a Mechanical Monster.

They are almost always Made of Explodium. Not to be confused with Ambiguous Robots, though their design may sometimes imply they are this.


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    Anime and Manga 

    Fan Works 
  • Advice And Trust: The cast fights Angels, giant alien monsters with Eldritch Abomination traits, but due to the changes in the relationships between the three pilots, the battles are very different from canon.
  • The Child of Love:
    • In chapter 3 shows up an Angel made up by the writer. It is based on Sahaquiel: it is an enormous, floating, heavy thing that plummets downward and tries to crush Tokyo-3 under its weight.
    • In chapter 7 appears another originally created Angel. It is called “Megrael”, it looks like a winged Evangelion and it remained airborne while shooting light beams.
  • Children Of An Elder God: At the beginning the Angels fought by the main characters seem to be just weird, massive aliens monsters, although very ancient and slightly eldritch. Then it is revealed that they are full-blown Eldritch Abominations and there are worst things behind them and their attacks.
  • Doing It Right This Time: The Angels -giant alien monsters- of canon, fought in the original timeline. Now the main characters have returned to the past, the battles have become quite different.
  • HERZ: In a chapter the cast had to fight an illegal Eva built secretly by the Chinese Government. It looked like the mutated offspring of a Mechanical Beast and an Evangelion.
  • Last Child of Krypton: Shinji -as Superman- and his pilot friends -driving giant robots- fight the Angels, alien Eldritch Abominations. In this crossover they had ruined other worlds before assaulting Earth: they wrecked Mars in the original fic, and Krypton in the second version.
  • The One I Love Is: The Angels -or Messengers-, giant alien monsters sporting all kind of shapes and abilities. Nearly all of them keep their canon selves, but Tabris. He is a her in this story.
  • Scar Tissue: The giant alien Angels had been all killed before the beginning of the story, but a Russian black project had used samples of their DNA to create another massive monster. In order to destroy it, the main characters have to repair and reactivate their last giant robot left.
  • Superwomen of Eva 2: Lone Heir of Krypton: The Angels from canon -humongous Eldritch Abominations-. Unlike than in canon, though, Asuka can fight them without her Humongous Mecha thanks to [[Supergirl her Kryptonian DNA]]''.

  • The original form of Mechagodzilla from Godzilla franchise. The second version was a human piloted mecha. The third version was a human piloted mecha built on the bones of the original Godzilla, dubbed Kiryu. Kiryu went berserk in its first confrontation with (a second) Godzilla, playing with the trope.
  • Then there's the cyborg Kaiju Gigan, the original Moguera (the second M.O.G.U.E.R.A. was, again, a human-built mecha), and Mecha-King Ghidorah.

    Live-Action TV 

    Tabletop Games 
  • Pretty much everything in Monsterpocalypse. For extra fun, the same company has released completely-compatible Voltron units, so the game has actual Robeasts.
  • Meka Dragon in King of Tokyo.



    Western Animation 
  • South Park — In the Sentai parody episode, Barbara Streisand turned into a Mechagodzilla.
    • And returned in "201" with full sentience.
  • Parodied in one episode of 'The Grim Adventures of Billy & Mandy'' where Grim takes Billy (who has been transformed into a 50-foot superhero) to Tokyo to meet a spoof of Gidora. An angry Mandy pilotes a giant gorilla robot called Mega-gorillasaur to bring them back.
  • The mecha-Stock Ness Monster in the Inspector Gadget episode "Monster Lake".