History Main / MechVsBeast

** ''Film/MightyMorphinPowerRangers'': The climactic battle is between the Rangers in their new Ninja Megazord against Ivan Ooze who has fused with one of his insect mechs.
** ''[[Series/PowerRangersTurbo Turbo: A Power Rangers Movie]]'': The Rangers battle an ancient monster named Maligore in their Turbo Megazord.

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* The movie ''Anime/UFORoboGrendizer, Manga/GetterRobo G, Anime/GreatMazinger: Kessen! Daikaijuu'' has these mecha (from different shows) allies to battle a giant prehistoric monster (even bigger than them) surviving unknowingly in the depths of the oceans.

* ''Anime/NeonGenesisEvangelion'': The eponymous [[GiantMecha EVA mechs]] are used by NERV to fight [[OurAngelsAreDifferent Angels]], which resemble [[AlienGeometries weird]] [[{{Kaiju}} giant aliens]] with no uniform appearance. The only thing that qualifies them as "Angel" is that they have a "blood pattern blue" ([[NonIndicativeName which, despite its name, is still red]]). However, it's played with because the [=EVAs=] are not really robots, but actually [[spoiler: cloned Angels in a mechanical restraining bolt]].
** In Episode 7 a competing agency tests an automated nuclear-powered mech, but a malfunction [[spoiler: or NERV sabotage]] causes it to go haywire, necessitating EVA 1 to stop it [[spoiler: making it something of an inversion.]]

* In ''Film/GulliversTravels2010'' the Liliputian villain builds a steampunk mech a head taller than Creator/JackBlack, and strong enough to give him a wedgie.

** Likewise, the low-budget knock-off ''Film/AtlanticRim'', mostly known for getting riffed in [[Recap/MysteryScienceTheater3000S12E02AtlanticRim season 12]] of ''Series/MysteryScienceTheater3000''.
* ''Franchise/PowerRangers'': The movies have featured this just like the t.v. show they are based on.

** ''Film/PowerRangers2017'': After gaining the ability to combine their Zords, the Rangers battle Goldar who in this continuity is a monster created from rocks and gold by Rita.

* ''Mecha vs. Kaiju'', which is ExactlyWhatItSaysOnTheTin.
* ''TabletopGame/BattleTech'' has the potential for this to happen, when [[HumongousMecha BattleMechs]] come into contact with [[{{Kaiju}} MegaFauna]]. It's more often than not an AvertedTrope, as of course it's [[JustHereForGodzilla the Mech on Mech warfare that most people are interested in]]. There's actually a planet that uses this trope to attract tourists. Called Hunter's Paradise, it's full of dinosaur-like reptiles that tourists hunt using armed Industrialmechs. Of course, as they're just animals and not super-powered kaiju, there's really not much danger involved.

* At one point in ''Website/{{Neopets}}'', a robot named Mechachiazilla tries to take over Maraqua and fights with a beast called Chiazilla.
* ''VideoGame/IntoTheBreach'' is a TurnBasedTactics game in which you control a mech squad to repel the invasion of {{kaiju}} known as the Vek.

* In ''VideoGame/{{Fortnite}}'', the Battle Royale Season 9 live event featured the giant [[https://vignette.wikia.nocookie.net/fortnite/images/1/19/Mecha.png/revision/latest?cb=20190805050143 Mecha Team Leader]] battling against a giant beast known as Cattus, or more officially, [[https://gamepedia.cursecdn.com/fortnite_gamepedia/f/fb/Cattus_The_Devourer.png?version=01e19f9285922a42a4a2a0c6fa9e31da the Devourer.]] An epic battle ensued in real time, with the Mecha emerging victorious after stabbing the Devourer's head with a [[BigFancySword giant sword]] made from the statue of Singularity.
* In ''VideoGame/EarthDefenseForce5'' the 150 foot Baraga, a mech built to function as a construction crane, is utilized as a weapon of war to defeat a large group of Archelus and Erginus.
* ''VideoGame/CosmicStarHeroine'' has a playable battle that works like this. After the party has defeated a giant mecha all on their own, its pilot, as a last-ditch move, releases an artificial creature named the Blobmith which grows to kaiju proportions in seconds. Alyssa, the titular heroine, then knocks the pilot out, takes control of the mecha and uses it to battle the Blobmith, before activating the self-destruction sequence of the mecha and blowing both it and the monster up. It's all a BigLippedAlligatorMoment because it has no impact on the rest of the plot and nothing to do with anything else, but it sure looks cool.

* Episode 27 of ''WebVideo/SuperPowerBeatDown'' features "Godzilla vs. Dragonzord". The King of the Monsters versus one of the most powerful ''Power Rangers'' Zords.

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* ''Webcomic/{{Unsounded}}'': Cresce developed their giant humanoid Firelopers to fight Alderode's dragon-like giant Vliegeng.

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* ''LEGO Jurassic World: The Legend of Isla Nublar'': Danny Neidermeyer does battle with an ''Allosaurus'' and a ''T. rex'' with a dinosaur mech that he intended to use for digging up No Beard's treasure.

* The climax of nearly every ''Franchise/SuperSentai'' episode starting with ''Series/BattleFeverJ'' (and by extension, every ''Franchise/PowerRangers'' episode) involves the MonsterOfTheWeek undergoing a MakeMyMonsterGrow and the heroes countering by summoning their HumongousMecha. Having a climatic battle between a giant robot and giant monster, however, actually originated from Creator/{{Toei}}'s earlier ''[[Series/SpiderManJapan Spider-Man]]'' live-action series. Of course, being a LongRunner series, certain ''Super Sentai'' series may play on the nature of the mecha and the monsters the heroes fight.

A SubTrope of FleshVsSteel and BehemothBattle. Compare AnimalMecha and {{Robeast}}, where it's a combination of a mecha and a beast. See also UltramanCopy for various giant, (usually) flesh-and-blood superheroes who fight giant monsters, and PrimateVersusReptile, another common matchup in monster stories. While initially very straight forward with the machine being the hero to root for against the beast, invoking much the same visual as a [[DragonsVersusKnights knight in armor against a dragon]], in recent years the inverse has become just as common.

** Practically every faction has truly massive mechs called Titans, including the OrganicTechnology Tyranids.

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* ''Series/TheBookOfBobaFett'': When the Pyke Syndicate deploys a pair of Scorpion droids [[spoiler: Boba]] gets his pet Rancor to fight them.

* ''TabletopGame/BattleTech'' has the potential for this to happen, when [[HumongousMecha BattleMechs]] come into contact with [[{{Kaiju}} MegaFauna]]. It's more often than not an AvertedTrope, as of course it's [[JustHereForGodzilla the Mech on Mech warfare that most people are interested in]].

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* ''Literature/RobotCommando'' is the 22[[superscript:nd]] book in the ''Literature/FightingFantasy'' series of interactive gamebooks. In it, players pilot a HumongousMecha dubbed "cowboys" and battle dinosaurs.

A SubTrope of FleshVsSteel and BehemothBattle. Compare AnimalMecha and {{Robeast}}, where it's a combination of a mecha and a beast. See also UltramanCopy for various giant, (usually) flesh-and-blood superheroes who fight giant monsters. While initially very straight forward with the machine being the hero to root for against the beast, invoking much the same visual as a knight in armor against a dragon, in recent years the inverse has become just as common.

A SubTrope of FleshVsSteel and BehemothBattle. Compare AnimalMecha and {{Robeast}}, where it's a combination of a mecha and a beast. See also UltramanCopy for various giant, (usually) flesh-and-blood superheroes who fight giant monsters.

* ''VideoGame/CosmicSpaceHeroine'' has a playable battle that works like this. After the party has defeated a giant mecha all on their own, its pilot, as a last-ditch move, releases an artificial creature named the Blobmith which grows to kaiju proportions in seconds. Alyssa, the titular heroine, then knocks the pilot out, takes control of the mecha and uses it to battle the Blobmith, before activating the self-destruction sequence of the mecha and blowing both it and the monster up. It's all a BigLippedAlligatorMoment because it has no impact on the rest of the plot and nothing to do with anything else, but it sure looks cool.

* ''Film/PacificRim'' is this trope personified. With an entire (defunded) international corps of two-pilot mechs called "Jaegers" for the express purpose of fighting the {{alien|invasion}} Kaiju coming out of the Pacific ocean.
** Likewise, the low-budget knock-off ''Film/AtlanticRim'', mostly known for getting riffed in [[Recap/MysteryScienceTheater3000S12E02AtlanticRim season 12]] of ''Series/MysteryScienceTheater3000''.

* Likewise, the low-budget knock-off ''Film/AtlanticRim'', mostly known for getting riffed in [[Recap/MysteryScienceTheater3000S12E02AtlanticRim season 12]] of ''Series/MysteryScienceTheater3000''.
* In ''Film/GulliversTravels2010'' the Liliputian villain builds a steampunk mech a head taller than Creator/JackBlack, and strong enough to give him a wedgie.