History Main / PerpetualMotionMonster

* The ''WebComic/StandStillStaySilent'' [[OurZombiesAreDifferent variant of zombies]] has living beings that were infected ''90 years ago'' still running around.

* The Doom Slayer in ''VideoGame/Doom2016'' and onward is a player equivalent of this. Canonically he does not need rest, food, or even hydration thanks to the enhancements in his body allowing him to subsist off of the essence he absorbs from the demons he slays. The result is a OneManArmy running on a perpetual RoaringRampageOfRevenge to slaughter Hell and its forces whenever they arise. He's so unstoppable and unceasing in his crusade that ''[[TheDreaded Hell itself fears his brutality.]]''

[[caption-width-right:314:[[Series/MontyPythonsFlyingCircus Nobody expects the [[NinjaPirateZombieRobot skeletal pirate]] [[SuperNotDrowningSkills SEAL team]].]]

[[caption-width-right:314:[[Series/MontyPython'sFlyingCircus Nobody expects the [[NinjaPirateZombieRobot skeletal pirate]] [[SuperNotDrowningSkills SEAL team]].]]

[[caption-width-right:314:Nobody expects the [[NinjaPirateZombieRobot skeletal pirate]] [[SuperNotDrowningSkills SEAL team]].]]

** A more traditional version, also a golem, is Mr. Pump in ''Discworld/GoingPostal''. As Moist's parole officer, it's explained that even though he can only walk while Moist can run, get a horse, or a cart, he will never tire, and never stop until he catches up to him. After one demonstration of this, Moist gives up on trying to run away.

* Androids 16, 17, and 18 in ''Anime/DragonballZ'' are "infinite energy models" according to their creator, Dr. Gero (compared to Androids 19 and 20 who must absorb energy from people instead). 17 and 18 thus specialize in VictoryByEndurance fights, because unless they get overwhelmed or badly injured, they'll always win by virtue of never getting fatigued.
** Super-17 from ''Anime/DragonballGT'' [[MasterOfAll had the best of both worlds:]] He had the "infinite energy" power source, but could ''also'' drain power through his hands to increase his power level (and conveniently enough, weaken his enemies at the same time). Unsurprisingly it takes [[spoiler:a combination of FightingFromTheInside from 17 and [[IKnowYoureInThereSomewhereFight 18 pressuring him]] to even bring him down to the same level as the Z fighters.]]

* In ''WesternAnimation/StevenUniverse'', the gem monsters, much like the gems themselves, require no sustenance to continuously project their HardLight bodies and can live forever provided their gems are not shattered. Because of this, the Crystal Gems have to bubble their gems to keep them in suspended animation when they 'poof' them. Gems at least need sleep after long periods of heavy exertion, but the main gems apparently haven't needed to sleep before the second season episode "Chille Tid."

* Androids 17 and 18 in ''Anime/DragonballZ'' are "infinite energy models" according to their creator, Dr. Gero (compared to Androids 19 and 20 who must absorb energy from people instead). 17 and 18 thus specialize in VictoryByEndurance fights, because unless they get overwhelmed or badly injured, they'll always win by virtue of never getting fatigued.

* In the ''Film/Underworld2003'' film series, the first Lycan William Corvus was sealed in a tomb for 600 years. Once he's out of his coffin, he's at full strength. He clearly wasn't in suspended animation.

* Androids 17 and 18 in ''Anime/DragonballZ'' are "infinite energy models" according to their creator, Dr. Gero. Androids 19 and 20 must absorb energy from people instead.

* In ''WesternAnimation/StevenUniverse'', the gem monsters, much like the gems themselves, require no sustenance to continuously project their HardLight bodies and can live forever provided their gems are not shattered. Because of this, the Crystal Gems have to bubble their gems to keep them in suspended animation when they 'poof' them.

This is usually a JustifiedTrope for [[OurGhostsAreDifferent Ghosts]], DemBones, and {{Elemental Embodiment}}s since they aren't really biologically based, so they don't need traditional food sources. Although, they may need some ''other'' form of energy or material as a PowerSource [[GodsNeedPrayerBadly (like prayers]] or lighter fluid), thus [[AvertedTrope averting this trope.]] For MechaMooks and other technology based creatures they usually incorporate some near infinite PowerSource (or a means to tap into an external one) and some form of {{Regeneration}}.

* ''ComicBook/JudgeDredd'': The Dark Judges are undead foes of Judge Dredd who have ruled their dimension for centuries as living dead. It's unlikely that their bodies even ''can'' decay on their own, as they are really [[PossessingADeadBody being fuelled by their spirits' psychic power]].

* [[Characters/GuardiansOfTheGalaxy Drax the Destroyer]] was originally created specifically to kill ComicBook/{{Thanos}}. His [[ArtificialHuman artificial body]] doesn't need to eat, drink, sleep, or breathe, doesn't age, is incredibly difficult to seriously injure, and if destroyed, regenerates from his own remains (or from the soil where he was originally created, if there isn't enough of his former body left). Unfortunately, in the decades since Drax's original creation, Thanos has had [[PowerCreepPowerSeep several power-ups]], reducing Drax from his oringal "grim avenger" status to a perpetual ''annoyance'' (for Thanos, not his [[MookHorrorShow minions]]). These days, he doesn't even rank among the Mad Titan's top ten enemies (though he did manage to score the coup de grâce during {{ComicBook/Annihilation}}).

* [[LivingShadow Enjin]] works this way in ''FanFic/TheBridge''. Being composed of solid dark magic, it need not rest, eat, or drink to continue pursuit of its quarry. [[spoiler:It's only weakness is that if separated from its master Bagan for long periods of time, its body will start to deteriorate.]]

* The monster from ''Film/ItFollows'' may not move fast, but it will never stop chasing whoever has the curse until they're dead. Then it goes after the ''last'' person who had the curse. It doesn't help that It is able to [[ParanoiaFuel take on the appearance of anyone]].

* The whole premise of the Creator/RoosterTeeth Animated Adventure [[https://www.youtube.com/watch?v=HINYhLtaaxc The Snail Assassin]]

* In ''WesternAnimation/StevenUniverse'', The gem monsters, much like the gems themselves, require no sustenance to continuously project their HardLight bodies and can live forever provided their gems are not shattered. Because of this, the Crystal Gems have to bubble their gems to keep them in suspended animation when they 'poof' them.

* The politician Vermin Supreme [[https://www.youtube.com/watch?v=4d_FvgQ1csE&=&t=3m34s proposed using zombies]] as a ''power source'' in his 2012 campaign to reduce America's dependency on foreign oil; by placing zombies in a giant turbine and dangling some brains in front of them to make them push the blades, they can become a PerpetualMotionMachine.

* In the ''Film/{{Underworld}}'' film series, the first Lycan William Corvus was sealed in a tomb for 600 years. Once he's out of his coffin, he's at full strength. He clearly wasn't in suspended animation.

* The Uncroaked/decrypted in ''{{Webcomic/Erfworld}}'' have zero upkeep.
** Interestingly, the latter still eat and drink, and are provided with what they need as if they had their usual upkeep cost (in the textual interludes, Parson tried Decrypted archon rations). ''Something'' outside the known forces of the world is evidently picking up the tab.

* ''Webcomic/TheOrderOfTheStic'': As one of TheUndead, the SorcerousOverlord lich Xykon doesn't need food, drink, air, or rest. The latter means he gets pretty bored [[OrcusOnHisThrone lounging around in his conquered territories]], because he's not interested in ruling and the RPGMechanicsVerse only lets him spend eight hours a day ItemCrafting.

* [[Characters/GuardiansOfTheGalaxy Drax the Destroyer]] was originally created specifically to kill ComicBook/{{Thanos}}. His [[ArtificialHuman artificial body]] doesn't need to eat, drink, sleep, or breathe, doesn't age, is incredibly difficult to seriously injure, and if destroyed, regenerates from his own remains (or from the soil where he was originally created, if there isn't enough of his former body left). Unfortunately, in the decades since Drax's original creation, Thanos has had [[PowerCreepPowerSeep several power-ups]], reducing Drax from his oringal "grim avenger" status to a perpetual ''annoyance'' (for Thanos, not his [[MookHorrorShow minions]]). These days, he doesn't even rank among the Mad Titan's top ten enemies (though he did [[CrowningMomentOfAwesome manage to score the coup de grâce]] during {{ComicBook/Annihilation}}).

* TheIncredibleHulk cannot be stopped except by being calmed down by a close friend or loved one. Trying to subdue him by physical means only makes him angrier and his strength is proportional to his anger and has no upper limit.

* ''ComicBook/JudgeDredd'': The Dark Judges are undead foes of Judge Dredd who have ruled their dimension for centuries as living dead. It's unlikely that their bodies even ''can'' decay on their own, as they are really being fuelled by their spirits' psychic power.

* Robots in the ''Franchise/{{Fallout}}'' games. By Fallout 4 it's been more than 200 years since the war that destroyed civilization, but you'll still find plenty of Mr Handies and Securitrons operating at full power despite a lack of access to any apparent fuel sources. Ghouls, despite being alive, are occasionally treated this way as well: there are multiple instances in the game where you'll encounter feral ghouls that have been trapped inside a room without a food source since the bombs fell, and they're still very active.

* [[Characters/GuardiansOfTheGalaxy Drax the Destroyer]] was originally created specifically to kill {{Main/Thanos}}. His [[ArtificialHuman artificial body]] doesn't need to eat, drink, sleep, or breathe, doesn't age, is incredibly difficult to seriously injure, and if destroyed, regenerates from his own remains (or from the soil where he was originally created, if there isn't enough of his former body left). Unfortunately, in the decades since Drax's original creation, Thanos has had [[PowerCreepPowerSeep several power-ups]], reducing Drax from his oringal "grim avenger" status to a perpetual ''annoyance'' (for Thanos, not his [[MookHorrorShow minions]]). These days, he doesn't even rank among the Mad Titan's top ten enemies (though he did [[CrowningMomentOfAwesome manage to score the coup de grâce]] during {{ComicBook/Annihilation}}).

* [[Characters/GuardiansOfTheGalaxy Drax the Destroyer]] was originally created specifically to kill {{Main/Thanos}}. His [[ArtificialHuman artificial body]] doesn't need to eat, drink, sleep, or breathe, doesn't age, doesn't break down, and doesn't produce fatigue toxins. Unfortunately, in the decades since Drax's original creation, Thanos has had [[PowerCreepPowerSeep several power-ups]], reducing Drax from his oringal "grim avenger" status to a perpetual ''annoyance'' (for Thanos, not his [[MookHorrorShow minions]]). These days, he doesn't even rank among the Mad Titan's top ten enemies (though he did [[CrowningMomentOfAwesome manage to score the coup de grâce]] during {{ComicBook/Annihilation}}).