[[quoteright:350:[[Anime/JoJosBizarreAdventure http://static.tvtropes.org/pmwiki/pub/images/iggybitesback_8.jpg]]]]
[[caption-width-right:350: This also takes place under a lake in a collapsing tunnel, [[MadeOfIron and the dog still survives!]]]]
When a pet can be just as much of an action character as any person.

Even in RealLife, pets aren't always harmless. They can be dangerous (say if people take in attack dogs or rescue dogs with behavioural problems as pets), or helpful. '''But this takes that even further,''' where the pet is fed on a diet of RuleOfCool.

These pets don't stop at going for help when people are trapped behind a landslide. They push boulders out of the way, fetch dynamite to toss at those rocks, or even just will the rocks to move by staring them down.

And the kind of pet doesn't matter. A parakeet, to an alligator, could count, as long as it does stuff that even amazes people that know what the species can do.

A SubTrope of ActionHero.

Can overlap with CoolPet, BadassAdorable, KillerRabbit, LivingADoubleLife (if the owner is not aware of the pet's action nature), HeroicPetStory, HeroicDog, TeamPet.



[[folder:Anime & Manga]]
* The series ''Manga/InuYasha'' features Kirara, an adorable nekomata (basically a feudal era demon cat) that can shift into a vicious combat mode that has increased size and flight. Is part of the main party, but is owned by Sango as a partner in the demon-slaying tribe.
* Pantherlily from ''Manga/FairyTail'' is this to [[ExtraOreDinary Gajeel]]. While the other Dragon Slayers have talking, winged cats as pets, Gajeel has one that can turn into a gigantic humanoid panther who wields a {{BFS}}.
* The Strawhat Pirates of ''Manga/OnePiece'' have a cute, cotton candy love, naive reindeer-man as TheMedic, who also doubles up as TeamPet. However, once he goes into Monster Point, he can kick some serious ass.
* Œufcoque of ''Literature/MardockScramble'' is an experimental multi-dimensional [[ShapeshifterWeapon all-tool]] shaped like a mouse. He's also a [[NiceGuy complete gentleman]].
* Iggy in ''Manga/JojosBizarreAdventureStardustCrusaders''. A dog with a stand, the Fool, that has the ability to shape-shift sand into a variety of objects, such as a hang glider.
** Apart from Iggy, ''Manga/JoJosBizarreAdventure'' also have a fair share amount of animals that have Stands, such as [[Manga/JojosBizarreAdventureStardustCrusaders Forever, Pet Shop]], [[Manga/JojosBizarreAdventureDiamondIsUnbreakable Stray Cat, Bug-Eaten and his unnamed partner]], [[Manga/JojosBizarreAdventureVentoAureo Coco Jumbo]], and [[Manga/JojosBizarreAdventureStoneOcean F.F. (whose actual form is a colony of zooplankton)]].
* ''Manga/ShoukokuNoAltair'': The entire Tughril clan became famous for training golden eagles to help them hunt and fight. The clan's two surviving members, Mahmut and Süleyman, are never seen without their eagles Iskender and Caterina.

[[folder:Fan Works]]
* In ''FanFic/TheFledglingYear'', Aravis’ belligerent horse Inga takes out her fair share of bad guys.
* FanFic/AGrowingAffection: Ni-ne, Hinata's pet cat [[spoiler: a.k.a. happily sealed version of the Two-Tails. She later helps Hinata fight off Kabuto's giant two-headed snake summon and stands guard over Rei when Konan tries to kidnap her.]]
* In the VideoGame/FinalFantasyVII fanfic, [[FanFic/CissneisPath Cissnei's Path]], Rufus Shinra's guard hound, Dark Nation, joins him in every battle and is the first line of defense should something try and harm him.

[[folder:Films -- Live-Action]]
* In ''Film/TheCameraman'', Buster's monkey jumps on a Tong thug that is about to jump Buster, saving Buster's life. Then the monkey starts cranking Buster's movie camera when Buster saves Sally, proving Harold's cowardice (he swam away and abandoned Sally) and Buster's heroism.

* In the ''Literature/TheDresdenFiles'' series, Harry acquires a very large dog named Mouse which is really [[spoiler:a Foo Dog]]. Said dog is explicitly smarter than a human, VERY resistant to damage, has a bark that can instantly wake everyone in an apartment building during an emergency, and innately detects evil.
* In the Honorverse you have Treecats. Though not actually pet's. Try to harm one or its adopted person and your dead meat.
* In ''Literature/ASongOfIceAndFire'', the Stark children each adopt one of a litter of orphaned direwolf pups. So far they've saved their owners' lives on numerous occasions.
* ''Literature/TortallUniverse''
** Starting with Faithful in ''Literature/SongOfTheLioness'', a divine entity in cat form who accompanies her on her quest.
** Kel's pets in ''Literature/ProtectorOfTheSmall'', largely due to the presence of [[Literature/TheImmortals Daine]] at the Palace. The animals Kel adopts--a flock of sparrows, an ornery horse, and a mutt named Jump--are intelligent enough to act as scouts and fellow combatants in battle.
** ''Literature/ProvostsDog'' has Faithful again, this time under the name of Pounce, taking an active part in police work. Beka also gets a scent hound named Achoo in the second book. While she's not a fighting dog, she does go with Beka into some dangerous places and takes on a couple of thugs who try to do her in.
* In ''Literature/TheDinosaurLords'', Karyl's pet dino Shiraa is infamous for her war toll, a capable predator and able to cross half the continent to get to her master. At some point, she even considers eating her pursuers, and doesn't only because she knows Karyl wouldn't approve. Oh, and she's a freakin' ''allosaurus''.
* In ''Literature/RiverOfTeeth'', all the riding hippos of Houndstooth's gang are action pets, but his own Ruby -- a particularly well-bred Cambridge Black -- is absolutely deadly and practically invisible in the marshlands and always ready for a fight.

[[folder:Live-Action TV]]
* ''Series/PersonOfInterest:'' Finch and Reese's TeamPet Bear the Belgian Malinois. Justified because he's a trained military dog.
* A MemeticBadass variation happened in a Creator/{{Nickelodeon}} promo for ''Series/{{Lassie}}'' had a kid making his own dog feel bad by trumpeting up what Lassie could do, including bombing Franchise/{{Godzilla}}.
* Max, the bionic dog from the original 1970's ''Series/TheBionicWoman''.

* Wet Willie's dog in ''Pinball/WhiteWater'', who accompanies him on all of his river rafting expeditions -- over waterfalls, down whirlpools, and dodging boulders -- with a big smile.

[[folder:Print Media]]
* Disney used to have a magazine where they had super-powered pets named the Jet Pets who attacked villains, while also being adorable pets.

[[folder:Video Games]]
* ''Franchise/{{Pokemon}}'' is about making creatures into action pets through [[DefeatMeansFriendship defeating wild ones]].
* The dog companions in the ''VideoGame/{{Fallout}}'' series (Dogmeat in ''VideoGame/{{Fallout 1}}'' and ''VideoGame/{{Fallout 2}}'' (special event), K-9 and Robodog in ''VideoGame/{{Fallout 2}}'', the other Dogmeat in ''VideoGame/{{Fallout 3}}'', Rex in ''VideoGame/FalloutNewVegas'', and another Dogmeat in ''VideoGame/{{Fallout 4}}'').
* Koromaru in ''VideoGame/Persona3'' is a dog who fought off a shadow with his bare teeth and joined SEES to continue the fight, now armed with a knife in his mouth and a super-powered incarnation of his inner psyche. He even [[spoiler:saves the entire rest of the team from Shuji Ikutsuki]].
** Before Koromaru was Pascal from ''VideoGame/ShinMegamiTenseiI''. Pascal is the hero's pet husky who witnessed the murder of the hero's mother, and tags along with the party. He can fuse with a demon to become a [[{{Hellhound}} Cerberus]] that is most likely [[CrutchCharacter thirty levels above]] the hero, and is one of very few demons to be controllable at a higher level than the hero. [[spoiler:He even joins the party after the thirty year timeskip, no questions asked]]. Koromaru's Persona is also named Cerberus as a callback.
* ''VideoGame/DarkSouls'': [[NobleWolf Great Grey Wolf Sif]] could be considered this, as he was the companion of Sir Artorias before his death. He also fought alongside his master and when you face him, he wields [[{{BFS}} Artorias' Greatsword]] [[CutlassBetweenTheTeeth with his mouth.]]
* Poppy, Galford's dog in ''VideoGame/SamuraiShodown'', does many of his moves, including some of the ''super'' moves.
* Interceptor, Shadow's dog in ''VideoGame/FinalFantasyVI'', will block attacks. In ''VideoGame/FinalFantasyVIII'', Angelo will perform some of Rinoa's super moves.
* In the FATE series the player has a pet that fights and levels up alongside you, and you can transform it from a cat to a werewolf, wyvern, or other such creature to improve its ability to fight your enemies.

[[folder:Web Original]]
* [[http://www.cracked.com/article_19578_5-most-badass-soldiers-ever-happened-to-be-dogs.html This article about 5 soldier dogs]] in ''Website/{{Cracked}}'' shows this trope can be TruthInTelevision.
* WebVideo/TheAngryVideoGameNerd's cat Death Kitty.
* Zwei, Ruby and Yang's pet corgi from ''WebAnimation/{{RWBY}}''. The most notable moment of this is when he performed a FastballSpecial... while ''on fire''.
* Hooty Mchootface and Waffles of WebVideo/DiceCameraAction are both adorable and full fledged monsters.

[[folder:Western Animation]]
* ''WesternAnimation/PhineasAndFerb'' have Perry the Platypus, who is a secret agent in an agency where virtually all of the field agents are {{action pet}}s, and have a FedoraOfAsskicking as their uniform.
* Rainbow Dash {{Invoked|Trope}} this in the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' episode "May the Best Pet Win!" by insisting her pet had to be awesome. It turned out the pet she got, [[spoiler:Tank the tortoise, was this, as he can lift large rocks with his head]].
** In "Owl's Well that Ends Well" Twilight Sparkle's new pet owl, Owlowiscius, helps save Spike from a full-grown dragon.
* Monkey in ''WesternAnimation/DextersLaboratory'' is secretly a superhero.
* Appa, from ''WesternAnimation/AvatarTheLastAirbender'' has several BigDamnHeroes moments, and that's before he gets ''plate armor''.
** Naga in SequelSeries ''WesternAnimation/TheLegendOfKorra'' is more directly so, even saving Korra and Mako when they almost get captured by chi blockers.
* Brain of ''WesternAnimation/InspectorGadget'' is the HyperCompetentSidekick of the bumbling detective, and arguably even Penny as well.
* Albert of ''WesternAnimation/TheDreamstone'' who is usually more competent and knowledgeable in stopping the Urpneys than the Dream Maker or his assistants.
* The old WB show ''WesternAnimation/RoadRovers'', about the pets of several world leaders who were secretly a superhero team.
* Pongo and Perdita in ''Disney/OneHundredandOneDalmatians''.
* Disney/{{Bolt}}, but only in the ShowWithinAShow. In "{{real life}}", he's just an ordinary dog.
** Let's not forget that the plot revolves around Bolt [[BadassNormal traveling across the entire continental U.S. to find Penny]], not to mention that he [[spoiler:almost singlehandedly [[BadassNormal rescues her from a burning TV studio]]]].
* In [[WesternAnimation/ClassicDisneyShorts some Disney cartoons]], MickeyMouse's dog [[WesternAnimation/PlutoThePup Pluto]] can get like this sometimes, if the situation arises.
* ''WesternAnimation/CourageTheCowardlyDog'' has faced numerous horrors that are enough to send a normal human running to the loony bin. But Courage goes through any lengths to save his owners Muriel and Eustace, though most times just Muriel.
* In ''WesternAnimation/{{Centurions}}'', Jake's pet dog named Shadow tends to accompany them on missions, as he is quite smart and also happens to wear a harness/rocket launcher that he definitely knows how to put to good use.
* ''WesternAnimation/KimPossible'' has Rufus, Ron's naked mole rat that accompanies him and Kim on missions, and has helped get the two out of jams numerous times.