[[quoteright:330:[[Webcomic/GirlGenius http://static.tvtropes.org/pmwiki/pub/images/FunSized.jpeg]]]]
[[caption-width-right:330:The Fun-Sized Mobile Agony and Death Dispenser, order yours today!]]

->''"The master of the Goblin blacksmiths offered to build the king a golden mechanical army. Seventy times seventy soldiers that would never know hunger, and could not be stopped."''
-->-- Tale of the Golden Army, ''VideoGame/HellboyIITheGoldenArmy''

So your MechaMooks aren't cutting it? What's the next logical step up from taking the already impressive stamina, loyalty, and destructive power of a mechanical henchman?

Simply, you go [[UpToEleven absolutely off the wall with them.]] Where the mecha-mook will be a dime a thousand, you'll see only a few, or only one, Mechanical Monster. This may be due to [[OffscreenVillainDarkMatter limited resources]] or simply because [[NoPlansNoPrototypeNoBackup everyone involved in making it is no longer amongst the living]]. They are always [[ImplacableMan improbably hard to stop]], [[SuperPersistentPredator incredibly persistent]], [[PerpetualMotionMonster never need to recharge]] and always, ''always'' terrifying to look at. Very likely to be the big bad's [[TheDragon Dragon]], and often times much tougher to kill.

It should also be noted, that while the mecha-mooks often are [[LighterAndSofter fragile, incompetent, and generally gentle at their jobs,]] expect the Mechanical Monster to be a far less kind to its prey. [[BloodierAndGorier Slashing, stabbing, soul stealing to fuel their infernal engines,]] and [[ArsonMurderAndJaywalking loud noises]] are all par for the course.

See also HomicideMachines, OurMonstersAreDifferent, {{Robeast}}.

----
!!Examples

[[foldercontrol]]

[[folder:Anime and Manga]]
* {{Mazinger}}:
** The MonsterOfTheWeek MechaMooks in ''Anime/MazingerZ'' are called "Kikaijuu", which is made of the words for "machine" and "monster" in Japanese.
** And then you have the Mykene War Beasts ("Sentoujuu") in ''Anime/GreatMazinger'', Mykene soldiers grafted into gigantic mechanical bodies. They had shape of humanoid warrior, evil spirit, mammal, bird, reptile, fish or insect.
** The Saucer Beasts and Vega Monsters from ''Anime/UFORoboGrendizer''. They are animalistic mechanical monsters resemble flying saucers pre-transformation.
* ''[[Manga/GetterRobo Shin Getter Robot]]'' is a rare heroic example, at least in the original manga arcs (Its more monsterish aspects get ''severely'' toned down in other appearances such as [[VideoGame/SuperRobotWars SRW]] or the getter OVAS)
** Mechasauruses and Mecha Oni play it straight, though: the former ones are robotical dinosaurs, and the seconds are horned, demonic-looking mechanical beasts.
* The standard MonsterOfTheWeek in Tadao Nagahama's ''Anime/RobotRomanceTrilogy'':
** The bio-mechanical Slave Monsters and Magma Beasts from ''Anime/CombattlerV''
** The Beast Fighters and later Super Beast Fighters from ''Anime/VoltesV'', resembling robotical Earth animals.
** The Battle Robots and Mecha Warriors from ''Anime/{{Daimos}}''.
* The Mecha Boosts from ''Anime/{{Zambot 3}}''.
* The Megaborgs from ''Anime/{{Daitarn 3}}'', although they start out as less-monstrous Meganoids before mutating themselves.
* The Haniwa Phantom Gods from ''Anime/KotetsuJeeg'': Mechanical monsters animated through magic means and resembling mythological creatures or evil spirits.
* Gola Mosca in ''Manga/KatekyoHitmanReborn''. It is powered by [[spoiler: the LifeEnergy of the Ninth Vongola Boss]].
* The 'oni' from ''{{Kakurenbo}}'', which resemble giant animatronic puppets.
* The manga "Seiketsu no Hagurama" had a literal blue-blooded prince and GadgeteerGenius construct SteamPunk looking machines like a [[http://www.mangahere.com/manga/seiketsu_no_haguruma/c001.1/16.html whale-shaped ship]] and a [[http://www.mangahere.com/manga/seiketsu_no_haguruma/c001.2/22.html pilot-ridden steam blowing minotaur]] whom he thought were being used for peaceful purposes (but were actually used to eradicate the remaining red-blooded people by his father and king).
* Nearly every episode of the American translation of {{Voltron}} -- both lion-team Voltron and vehicle-team Voltron--culminated in a fight against a giant enemy [=RoBeast=]. Once or twice on the vehicle-team Voltron show, these robotic engines of destruction were shown with normal-sized pilots inside. (Since this was a NeverSayDie translation, the pilots were themselves android stormtroopers.)
* The Pacifistas of ''OnePiece''. These guys are made of an incredibly hard material, making them NighInvulnerable to typical physical attacks, possess FrickinLaserBeams in a story that presumably takes place in the [[AnachronismStew 15th century]], and share the appearance and physical strength of [[BearsAreBadNews Bartholomew Kuma]], one of [[TheDreaded the most feared men in the One Piece world.]] It's said that one of these things is the equivalent of a ''battleship'', and it took all of the main characters working together with everything they had to beat a single one pre-Time Skip.
** Double Subverted after said TimeSkip. Two Pacifistas fall victim to TheWorfEffect to demonstrate how powerful the Straw Hats are now, [[CurbstompBattle proving to be absolutely no challenge for them anymore.]] However, immediately after that, it's been stated that there are far more powerful Pacifista out there now, though they haven't been shown, nor has it been stated exactly what's improved over the originals.
[[/folder]]

[[folder:Comicbooks]]
* Franchise/{{Batman}} has a robot dinosaur in the TrophyRoom of the Batcave; a souvenir of a case called "Dinosaur Island".
* In [[MarvelComics Marvel's]] [[MerchandiseDriven toy tie-in]] comic ''The {{Starriors}},'' the title characters are about evenly split between semi-humanoid robots and animal and dinosaur-shaped ones. They're all perfectly sentient.
* [[SelfDemonstrating/DoctorDoom Dr. Doom]] had one, [[http://marvel.wikia.com/Doomsman_II_(Earth-616) The Doomsman]].
* ''ComicBook/TheTransformers'' features the Guardian Units, which are bright yellow, ridiculously huge by Cybertronian standards, and have a distressing tendency to turn against their owners. They are also incredibly over-powered and very strong, to the extent that even one of them is enough to give [[BigGood Optimus Prime]] trouble.
** They reappear in ''ComicBook/TransformersMoreThanMeetsTheEye'', where an army of them is sent up against Overlord, [[TheWorfEffect who quickly ploughs through them]].
[[/folder]]

[[folder:Films -- Animation]]
* ''WesternAnimation/TheIncredibles'' sported the Omnidroid. [[spoiler:Developed and controlled by the BigBad by evolving the design from pitting it against retired superheroes, the robot is extremely intelligent, fast, extremely deadly, and invulnerable to just about anything except weapons made from the robot's own tough metal.]]
* The villains from ''WesternAnimation/{{Nine}}'' fit the bill, and all of them are appropriately horrific. The Big Bad, [[BuffySpeak the huge, multi-armed arttificial brain thing]], ''DEFINITELY'' fits the bill.
* The Leviathan from ''Disney/AtlantisTheLostEmpire'' is a MagiTech version of this, somewhere in the vicinity of a ''couple miles long'', [[PerpetualMotionMonster capable of staying intact without recharge for thousands of years]], [[TheJuggernaut immune to direct torpedo hits]] and equipped with shearing claws and a particle beam-like BreathWeapon. Only one of them still functions by the time the heroes arrive at the gateway to Atlantis, but it's more than enough to trash their sub and kill over a hundred people.
[[/folder]]

[[folder:Films -- Live-Action]]
* The title Golden Army from ''Film/{{Hellboy}} II: The Golden Army''. Saved from being simple mecha-mooks by their sheer hardiness. And a [[PullingThemselvesTogether self-repair function]].
* The giant Harvester from ''[[{{Terminator}} Terminator Salvation]]'' would most definitely count, as would the semi-humanoid tanks from the earlier movies.
* [[RobotMe Mecha-Godzilla]] anyone? A metal doppleganger of Franchise/{{Godzilla}} that was twice as deadly.
* Maximillian from ''Film/TheBlackHole'' pretty much takes this to horror territory.
* In ''Film/RedSonja'', the bad guys unleash a killing machine in the form of a robotic alligator. It's completely invulnerable to the heroes' weapons, except for the eyes, which they carve out.
* The most realistic examples may be the small attack "bugs" from ''Film/{{Runaway}}'', whose compact six-legged design was based on real state-of-the-art robotic prototypes of the time. Not as formidable-looking as others on this page, but their ZergRush tactics and acid-injectors make up for it.
* The Droideka model of battle droid from StarWars (the prequel trilogy) is this. These fun bots often give [[ImplausibleFencingPowers the]] [[PsychicPowers Jedi]] a run for their money.
[[/folder]]

[[folder: Literature]]
* Tash and Zak Arranda are menaced by a [[spoiler: simulation]] of one of these in ''Literature/GalaxyOfFear: The Nightmare Machine''.
[[/folder]]

[[folder:Live-Action TV]]
* Not a straight example, but the [[ItWasHisSled Smoke]] Monster on ''Series/{{Lost}}'' mixes mechanical noises (cranking, whirring) in with its biological noises (roaring, growling). Because it has no moving parts (being an amorphous cloud of black vapor), it is not clear where any of these noises are coming from. The most popular {{Fanon}} theory is that it generates these noises arbitrarily to frighten people.
** Quite remarkable, considering that it was born before the machines that generate such noises were invented. It's more probable that the creators hadn't decided the monster's true nature when they thought up its properties, and added the machine noises for a combined RedHerring and unnerving effect.
*** It was, however, on the Island when such machines were used, so it would have been able to observe them.
* If the smoke monster counts, then its grandfather Rover from ''ThePrisoner'' deserves a mention too. It's a white floating plastic sphere, and acts as a security device for The Village, but it's also ''alive'' somehow; it roars and groans and has a mind of its own, even killing the wrong person once.
** Rover was originally a more straight [[http://en.wikipedia.org/wiki/Rover_%28The_Prisoner%29 robotic example]] of the trope, until the prop [[SpecialEffectFailure sank in the waters off Portmeirion]] during the initial stages of filming.
* Certain Super Sentai seasons like Ohrangers and Go-Busters use machines as MonstersOfTheWeek.
[[/folder]]

[[folder:Tabletop Games]]
* TabletopGame/{{Warhammer 40000}} has many. ''Many, many, many.''
** The Dark Eldar [[http://wh40k.lexicanum.com/wiki/Talos Talos]] from ''TabletopGame/{{Warhammer 40000}}'' is a heavily armored floating mechanical scorpion acting as their version of a tank that grabs people off the battlefield and pulls them inside itself to slowly [[ColdBloodedTorture torture them to death]], which [[EmotionEater powers its systems and weapons with their agony and souls]]. On the outside it has various torture implements acting as claws to restrain other victims, then torture and kill them to remove their souls. It also has a cannon in the shape of a tail that fires incredibly corrosive bio-acid.
** The Necrons have the Tomb Stalker, a giant metal centipede with two guns that fire beams of energy that flay you molecule by molecule. If that wasn't enough, it can become incorporeal in order to pursue its targets ''directly through'' the labyrinthine halls of the Necron crypts it guards. It can also sense you coming from literal miles away.
** Chaos has a variety of these as well. Chaos Daemons employ hulking brutes fused to a SpiderTank chassis called Defilers, that have cannons both mechanical and organic in nature. They can also use a form of monstrous Mecha which teleports. As well, Juggernauts are basicly half-mechanical half-organic demonic Rhinos.
** Chaos Space Marines have similar bipedal Mecha monsters that were formerly entirely mechanical. They have mechanical dinosaurs with MoreDakka called Forgefiends that are armed with GatlingGood or plasma cannons, or a close combat variety. Last but not least a robotic dragon flyer called Heldrakes that have a gatling cannon or a flamer for a BreathWeapon and adamantium claws which can swoop down and slice tanks in half.
* Some of ''TabletopGame/MagicTheGathering'''s more impressive artifact creatures easily qualify as this rather than the standard MechaMooks of dragon engines and myr.
** The main villains of the series, the Phyrexians, have the purpose in life of turning all living things in existence into this, and are these themselves.
* Well, in ''TabletopGame/DungeonsAndDragons'' there are several [[CallARabbitASmeerp "constructs"]] that fit this category, most notably the Hellfire Engine, a GiantMecha made out of cold iron and powered by (as well as shooting) hellfire and the Anaxim, basically the twisted mechanical abortion produced by a god of the forge getting a little too crazy.
* Warjacks in the TabletopGame/IronKingdoms are large (seven to twelve feet tall) steam-powered robots used to protect and assist the setting's Not-So-{{Squishy Wizard}}s.
* In TabletopGame/{{Mortasheen}}, the genocidal villain civilization of Wreathe has 9 of these called Celestial Engines, all of them named and themed after planets, as well as the model for all Wreathe's MechaMooks.
* Whenever you want to tell your players to [[ThatOneBoss go f*** themselves]] in your ''TabletopGame/GammaWorld'' game, you use the setting's [[OhCrap mechanical equivalent to the]] [[TabletopGame/DungeonsAndDragons Tarrasque]] the [[ExactlyWhatItSaysOnTheTin Death Machine]]
* ''TabletopGame/{{Exalted}}'' has its fair share of these, such as the Thousand-Forged Dragons and the Brass Leviathan.
[[/folder]]

[[folder:Videogames]]
* Some of the monsters in VideoGame/PuzzleAndDragons, especially the higher-level monsters, are definitely this.
* The alien Hunter from ''VideoGame/{{Crysis}}'' is this qualified with a [[TripodTerror Quadruped Terror]]. It's a house-sized HumongousMecha with a decidedly inhuman design (looking more like a deep-sea [[GiantEnemyCrab crustacean]]), bristling with {{Freeze Ray}}s and {{Wave Motion Gun}}s. It also has several moving parts on its front, which seem to be there only because they look threatening. Also, it can ''roar''.
* The ''[[BanjoKazooie Banjo-Tooie]]'' boss Weldar is this trope, albeit in a very unconventional way. Namely, the fact that he is a giant killer welding torch who can electrify the floor.
* The ROB line in VideoGame/ChronoTrigger could be a good example of these. Also, Lavos' core seemed very Mecha-esque.
* VideoGame/MegaMan, being a robot-based series, has its share of these, mostly as Wily Fortress bosses, most notably [[ThatOneBoss The Yellow Devil]] and all the other Devil series robots.
* [[BonusBoss Omega Weapon]] from the ''Franchise/FinalFantasy'' franchise is often depicted as this. Other times he's a ''bio''-mechanical monster.
* ''VideoGame/CastlevaniaLordsOfShadow'' has a giant robot scorpion BrainInAJar built by Doctor Frankenstein.
* The [=FuzzBomb=] from ''VideoGame/AgentUSA'' used to be a normal television set, until an experiment GoneHorriblyWrong gave it malevolent sentience (with angry eyes!), and it's now trying to turn everyone in the entire United States into mindless, walking TV static.
* Most players wouldn't know what the second boss ([[http://metalslug.wikia.com/wiki/Aeshi_Nero Aeshi Nero]]) of ''MetalSlug 2/X'' is when they first see it. It's a giant robotic cobra.
* ''VideoGame/MetalGearSolid4GunsOfThePatriots'': The Gekko are as much life-form as machine; they're about as smart as an animal, make appropriate sounds when they're in distress, and, of course, have organic legs. They also follow the basic use of the Mechanical Monster trope in that they are much more dangerous and intimidating than a simple robot would be.
* Among the many [[OurDwarvesAreDifferent Dwemer]] Animunculi you run into in ''Franchise/TheElderScrolls'' series, there is always at least one type of these. In ''[[VideoGame/TheElderScrollsIIIMorrowind Morrowind]]'', you had Steam Centurions. In ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]'' there are Dwemer Centurions. These things are rare, difficult to kill and can end your quest in a few hits if you are careless. And as if that was bad enough, ''Skyrim'' also has the Dwemer Centurion Master. They are twice the size of their lesser brethren and naturally their armor and killing power are doubled.
* The Frost Orca from ''VideoGame/MiniRobotWars'' is a large, whale-submarine bot that spits out deadly ice balls, has a TON of health, is more tenacious than the regular mooks, and acts as a BossInMookClothing. [[ArsonMurderAndJaywalking It also practices good dental hygiene]].
* [[SpiderTank Scarabs]] in the ''Franchise/{{Halo}}'' series are controlled by the same [[WormThatWalks alien worms]] that composes the [[GiantMook Hunters]], and have an organic roaring sound.
* The Harvester {{Spider Tank}}s in ''VideoGame/QuakeIV'' seem to be partially organic like the aforementioned Scarabs, by the sounds they make.
* The Meka Dragon in the ''Franchise/WonderBoy'' series.
* ''VideoGame/{{Descent}} 3'' has the Homunculus, which looks like a mechanical version of the Rancor from ''ReturnOfTheJedi''.
* The Mechon in ''VideoGame/{{Xenoblade}}'' are all walking machines of death and mayhem, but they couldn't be called monsters, at least not individually. Some of them are larger and have faces. The faced Mechon are the ones who could be called monsters [[spoiler:but they aren't really machines]].
* The Autosaurus Wrecks in ''Videogame/SimCity 4''. It's basically a T-Rex (or perhaps Franchise/{{Godzilla}}) made of cars.
* One of the Black Knight's twisted inventions, the Moat Monster, from ''VideoGame/SlyCooperThievesInTime''.
* In the first ''VideoGame/{{Shantae}}'' game, a giant HornedHumanoid monster robot thing that [[TransformingMecha transforms]] into a [[RollingAttack spiked wheel]] serves as the boss of the [[BigBoosHaunt Cackle Mound]].
* The Precursor robots from the Franchise/JakAndDaxter series would count. You also get to encounter the occasional Dark Maker robot in the third game.
* ''Franchise/MassEffect'': Reapers go a bit beyond this into "Mechanical EldritchAbomination", but they'd have to count the few times you fight one on foot - most notably Priority: Rannoch, which famously involves syncing up a target pointer to the biggest fleet in the galaxy and having them rain Thanix projectiles on its weak point.
* ''VideoGame/TheLegendOfZeldaMajorasMask'' has Goht, whose [[BossSubtitle title]] actually ''is'' (Masked) Mechanical Monster. It's an enormous mechanical goat-like monster that [[GetBackHereBoss constantly runs away,]] and the only way to make it stop after waking it up is to destroy it.
[[/folder]]

[[folder:Webcomics]]
* In ''Webcomic/TheInexplicableAdventuresOfBob,'' [[GadgeteerGenius Molly]] [[http://bobadventures.comicgenesis.com/d/20090811.html builds one,]] seemingly just for fun.
* ''Webcomic/GirlGenius'' has a lot, including a great many built by the Heterodyne family. When the {{Mechanical Monster}}s are not available, the Heterodynes fall back on their good old-fashioned biological monsters.
[[/folder]]

[[folder:Western Animation]]
* The Renegades in ''WesternAnimation/ChallengeOfTheGobots'' use Mechanical Monsters called Zods. Cy-Kill's EvilPlan in the FiveEpisodePilot is to obtain the means to build an entire army of the suckers; he succeeds, but they all get blown up by a [[ChekhovsGun Chekhov's Bomb]] introduced earlier. The Renegades continue to use Zods after this, but more sparingly. They also have one called Scales, who can [[TransformingMecha transform]] into a racecar, but he only appears rarely.
* Franchise/{{Transformers}} has several, including the Terrorcon combiner team, the Monsterbots, the [[MixAndMatchCritters Fuzors]] and Trypticon.
* The old ''StarWars: Droids'' cartoon featured one of these in the form of the villainous Great Heep, which eats other droids to refuel and maintains a droid harem. [[Franchise/StarWarsExpandedUniverse Later on he is revealed]] as a member of the Abominor, an entire species of these creatures from outside the main galaxy. They were at war with the Silentium (who are made up of AlienGeometries), which is implied to be the reason for the [[NewJediOrder the Yuzhaan Vong leaving that galaxy]].
[[/folder]]

[[folder:Real Life]]
* [[TwoWordsObviousTrope One word...]] [[ExactlyWhatItSaysOnTheTin TRUCKASAURUS!]] [[http://shellgames.files.wordpress.com/2009/04/truckasaurus2.jpg See?]]
* [[http://en.wikipedia.org/wiki/Deep_Blue_%28chess_computer%29 Deep Blue]].
[[/folder]]

----