Character page for the ''WesternAnimation/InspectorGadget'' animated series.

!Gadget and Friends
[[folder: Inspector Gadget]]
-->'''Voiced by:''' Creator/GaryOwens (original pilot), Jesse White (first revision of pilot), Don Adams (second revision of pilot and remainder of original series), Creator/MauriceLaMarche (''WesternAnimation/GadgetAndTheGadgetinis'', ''Inspector Gadget's Last Case'', ''Inspector Gadget's Biggest Caper Ever''), Luc Durand (French voice)
-->'''Played by:''' Creator/MatthewBroderick (1999 movie), [[Series/ThirdRockFromTheSun French Stewart]] (''Inspector Gagdet 2'')

* AccidentalHero: Believe it or not, there are actually a number of times when Gadget is legitimately helpful and actually contributes towards solving the case. It's just that he tends to do it purely by accident.
-->'''Gadget''' ''[whenever he's congratulated for solving the case]'': I did?
* AdaptationalBadass: He's a lot more competent in the first live action movie, to the point where he actually arrests Dr. Claw.
* AdultsAreUseless: However, when Gadget knows Penny is in danger, he becomes scarily competent.
* ArtificialLimbs: His arms and legs appear to be robotic.
* BadassLongcoat: He wears a huge overcoat and on rare occasions can turn out to be very competent when he needs to be.
* CallingYourAttacks: Zig-zagged. Gadget usually uses his "Go-Go Gadget" CatchPhrase to activate his gadgets, and a second-season episode says that they're activated by voice commands. However, Gadget's gadgets will sometimes activate by themselves, either by accident or because Gadget simply wants them to. Penny and Brain have also activated Gadget's coat by pulling the button that inflates it.
* CatchPhrase:
** "I'm always on duty."
** "Go-go Gadget [insert name of gadget he's trying​ to use]!"
** "Wowsers!"
* ChekhovsSkill:
** His sheer clumsiness, as proven when Quimby shows up and there's an impostor in the same room. Quimby knows which Gadget is which just because one of them happened to attack him with a stray mallet [[SpannerInTheWorks that just happened to go off by itself at exactly the right moment...]]
** Also his tendency to mistake Brain for a MAD agent. In "MAD Trap" Brain is savvy enough to intentionally pretend to be criminal to distract Gadget away from a booby trap.
* CluelessDetective: He has a reputation for being a great detective, but it's really thanks to Penny and Brain's help that his incompetence hasn't gotten him killed or ruined his chances at foiling Dr. Claw's schemes.
* CrouchingMoronHiddenBadass: During rare moments when he shows competence.
* {{Cyborg}}: He has robotic parts, but several episodes imply that he used to be human. For example, he still has basic human needs such as hunger and sleeping.
* DecoyProtagonist: Somewhat arguably for his niece Penny.
* TheDitz: He's often unable to successfully solve cases himself because he's a moron. That said, the mayhem he causes is often directly helpful to Penny and Brain.
* DrivesLikeCrazy: It's amazing he still has a license, really.
* ExpressiveHair: Gadget's hair droops when he's sad, disappointed, or surprised.
* {{Expy}}: Of [[Franchise/ThePinkPanther Inspector Clouseau]] and [[Series/GetSmart Maxwell Smart]].
* FakeUltimateHero: He has a reputation of being the world's greatest crimefighter, and while he has managed to save the day himself on rare occasions, it's usually Penny and Brain that do all the work.
* FearlessInfant: Gadget was shown to be one in a flashback of the final episode, where he is seen as a baby witnessing crime boss Spuds Malone gun down people with his potato gun the Red Rose and being completely unfazed by the chaos.
* {{Flanderization}}: In the pilot, Gadget was bumbling, but not nearly as oblivious, and managed to fend off most of MAD's schemes via competence. Early episodes [[DependingOnTheWriter occasionally flip flopped]] between this depiction and his iconic AccidentalHero persona before finally settling for the latter. This was taken UpToEleven where most spin offs such as ''WesternAnimation/GadgetAndTheGadgetinis'' are concerned.
* FlippingTheBird: Surprisingly in a children's series, he does this in the OPENING sequence! Granted, he wasn't trying to be deliberately offensive; his bird just happened to be a flashlight.
* TheFool: Despite his idiocy, Gadget continually helps Penny and Brain out in one way or another, which leads to some {{Alternate Character Interpretation}}s among fans that he's merely ObfuscatingStupidity.
* HatOfFlight: His hat can become a helicopter hat.
* HiddenDepths: Though incompetent as an actual sleuth, Gadget often gives rather insightful lessons [[AndKnowingIsHalfTheBattle about day-to-day lifestyle]] to his niece at the end of each episode.
* HorribleJudgeOfCharacter: Gadget ''always'' believes the lies MAD agents tell him. He'll even trust MAD agents that aren't even bothering with deceiving him and are just trying to kill him ("Ah! The welcoming commitee!"). This goes all the way to the opposite end of the spectrum. He'll spot Brain in disguise, and instead of recognizing Brain, he'll think Brain is the MAD agent!
* HyperspaceArsenal: He has a lot of stuff inside his hat.
* IdiotHero: The main protagonist and a complete dunce.
* InspectorOblivious: Aside from actually being an inspector, he also tends to be very gullible.
* InvincibleIncompetent: While not very bright, his stupidity often causes him to unknowingly thwart M.A.D. agents' attempts to kill him, when he doesn't otherwise ruin MAD's plans outright.
* KindheartedSimpleton: Gadget means well in his antics and is trying to save the day, he's just completely inept about it.
* KnowNothingKnowItAll: Gadget would always prevent Penny and Brain from ever coming with him on missions because "it's much too dangerous". Really, the missions are much too dangerous for him since he's a HorribleJudgeOfCharacter, an InspectorOblivious, and basically TooDumbToLive. One of the biggest reasons why he succeeds and survives is ''because'' of Penny and Brain's interventions, which he is never aware of.
* LastNameBasis: In the animated incarnations. In the movie Gadget is just a nickname given to him by the press and his real name is John Brown.
* LawfulStupid: He works for the Metro City police and is a complete idiot.
* LetsGetDangerous: Very, ''very'' rarely, Gadget showed competence and was able to avert disaster all on his own. This tends to happen when Penny is in danger.
* ManChild: He occasionally acts this way, such as in "Gone Went the Wind", when he becomes snowblind, mistakes a polar bear for Santa Claus, and sits on the polar bear's lap asking for a choo-choo train, a candy cane, and a doll of himself.
* NamedByTheAdaptation: The 1999 movie gave Gadget the real name of John Brown.
* NiceHat: He wears a fedora.
* ObfuscatingStupidity: It's been argued that he only acts like a bumbling idiot, and lets Penny be the hero. One of the biggest arguments for this is that he becomes [[PapaWolf significantly more competent, and significantly more dangerous, when Penny is in genuine danger]].
* OlderThanTheyLook: According to "Gadget and the Red Rose", Gadget is in his ''fifties''.
* OOCIsSeriousBusiness: See also PapaWolf and LetsGetDangerous. Threaten Inspector Gadget's niece Penny, and you'll instantly find out just how competent the normally bumbling Gadget can be. In "The Infiltration", he also gets a line spoken with a dead-serious tone you wouldn't expect--namely, that if he doesn't catch the phony soon, "the security of the free world could be in jeopardy."
* PapaWolf:
** When he ''knows'' Penny is in danger, Gadget becomes virtually unrecognizable (and unstoppable) as he becomes the superhero he is ''supposed'' to be. For what it's worth, one of his few talents seems to be acting as a guardian; when not oblivious to some villain on her tail, he raises Penny rather well and [[AndKnowingIsHalfTheBattle gives rather intelligent life lessons]].
** This extends to other people Gadget cares about. He's gone to similar lengths to save Brain (when he actually knows that he's dealing with Brain, as opposed to thinking the disguised Brain is a MAD agent) and Professor Von Slickenstein, the scientist who gave him his gadgets.
* ParentalObliviousness: Gadget has no idea that it's his niece solving his cases and saving the world.
* PoliceAreUseless: Aside from the rare occasions where he proves himself to be competent when he needs to be, Inspector Gadget is a bumbling imbecile who is easily deceived by Dr. Claw and M.A.D.
* SimpleMindedWisdom: For all his idiocy as a detective, the guy gives his niece some meaningful advice in domestic and outdoor life in the educational bumpers.
* SmartBall: Gadget, who could show competence whenever it was necessary to advance the plot. Several of MAD's attempts to derail the train in Basic Training were thwarted by Gadget himself, while in The Ruby Gadget defeated the tigers Dr. Claw sent after him on his own.
* SpannerInTheWorks: Despite Gadget's idiocy, the chaos he causes frequently helps Penny and Brain save the day. He's also destroyed more than one MAD base by accident.
* SuperStrength: While usually not demonstrated in very ostentatious fashion, Gadget's baseline strength is clearly superhuman. There are occasional exceptions where it's more obvious; for example, in "Gadget's Gadgets" he broke free when literally ''riveted'' in place with steel bands on an operating table.
* SuperToughness: Gadget frequently suffers more extreme abuse than Franchise/RoboCop has to put up with on a bad day. He has survived falls off skyscrapers, crashing airplanes, [[HighVoltageDeath electrocutions]], any number of bombs and [=IEDs=], and even being [[HalfTheManHeUsedToBe sawn in two]]. As yet, nothing has permanently crippled him.
* SwissArmyAppendage: He has several of these, though most of his gadgets come from his hat.
* TooDumbToLive: Penny and Brain have to keep Gadget's stupidity from getting him killed in even the most mundane of situations.
* TrickedOutShoes: His shoes can become magnets and roller skates.
* UselessProtagonist: Half the time, the other half his bumbling [[TheFool inadvertently comes handy]] (about five or six times throughout the show [[LetsGetDangerous he actually saves the day through competence]]).
* WackyParentSeriousChild: A variant in that he is the Wacky Uncle to Penny's serious niece.
* WeCanRebuildHim: His origin in the movie is that he was converted into a cyborg after being injured in an accident.
* WhereDoesHeGetAllThoseWonderfulToys: It's never explained where he got all his gadgets.

[[folder: Penny]]

-->'''Voiced by:''' Mona Marshall (pilot), Creator/CreeSummer (first season), Holly Berger (second season), Erica Horn (''Inspector Gadget Saves Christmas''), Tegan Moss (''Gadget and the Gadgetinis'', ''Inspector Gadget's Last Case'', ''Inspector Gadget's Biggest Caper Ever''), Patricia Danot and Barbara Tissier (French voice)
-->'''Played by:''' Creator/MichelleTrachtenberg (1999 movie), Caitlin Wachs (''Inspector Gadget 2'')

* AgeInappropriateDress: Her swimsuits tend to be very revealing for a ten-year-old.
* BadassAdorable: A young girl who succeeds in anonymously helping her uncle thwart Dr. Claw's plans.
* BadassBookworm: She has a book that's also a computer (the best of both worlds). She's also suggested to be a very good student.
* BorrowedCatchPhrase: She sometimes uses her uncle's CatchPhrase of "wowsers!" She has also occasionally used Gadget's "Go-Go Gadget" phrase when using her computer book to activate one of the Gadgetmobile's gadgets.
* BoundAndGagged: Whenever she gets caught by a M.A.D. agent, she often gets tied up.
* DamselInDistress: She is often captured and tied up by Claw's henchmen.
* DamselOutOfDistress: She oftens escapes from Claws' handmen, or arranges for Brain to rescue her.
* DisappearedDad: Since Inspector Gadget is Penny's uncle and guardian, no mention is ever made of Penny's father...
* DubNameChange: In the French version her name is Sophie.
* {{Flanderization}}: In the pilot and a couple of early episodes, she was largely a TagalongKid who secretly helped Gadget with the odd obstacle he couldn't handle himself. Afterwards she's Gadget's HyperCompetentSidekick who often does the whole mission while her uncle screws up.
* GirlishPigtails: She has pigtails.
* HairOfGoldHeartOfGold: Her hair is blonde and she is a very kindhearted person.
* HyperCompetentSidekick: Though Gadget doesn't know it, she helps her uncle solve all his cases.
* KidDetective: She's a young girl who solves cases for her uncle.
* {{Nephewism}}: As Gadget's niece, she is her uncle's only living relative.
* NervesOfSteel: It's amazing how she hardly gets annoyed with her uncle's antics.
* NiceGirl: Penny rarely shows anger, hardly ever even gets annoyed (even with her uncle's antics), and the number of people she shows intense dislike for throughout the entire franchise can be easily counted on one hand. As a result, she has a knack for making friends and allies at the drop of a hat.
* NonStandardCharacterDesign: In comparison to the other very cartoony designs in the show, Penny's is noticably more anime inspired and realistically proportioned. ''WesternAnimation/GadgetAndTheGadgetinis'' gives her a somewhat wackier design, though still slightly more subtle than the rest of the cast.
* NotSoAboveItAll: She may be the most competent and mature person in her household, but mention her favorite singer and she still goes into shrieking fangirl mode.
* OnlyOneName: Penny was never given a last name, though a lot of people just assume it's Gadget.
* ParentalAbandonment: It's confirmed in the second season that Penny's parents are apparently deceased. We only have Dr. Claw's word for it but according to him, Penny is Gadget's only living relative.
* PluckyGirl: She remains calm even when in dangerous situations.
* {{Protectorate}}: Most of the rare times her uncle achieves something competent is when Penny's life is on the line. At least when he ''knows'' it.
* SnoopingLittleKid: Frequently spies on M.A.D. agents to see what they are up to.
* {{Tomboy}}: Not all that feminine.
* UnknownRival: The key comedy of the show is that it's Penny who undoes Claw's schemes but Claw is somehow convinced Gadget is his main enemy. Averted in the second film, where he considers her more of a WorthyOpponent than Gadget.
* WackyParentSeriousChild: A variant in that she's the Serious Niece to Gadget's Wacky Uncle.
* WhyDidItHaveToBeSnakes: When it comes to ghosts. She gets over it with the help of Gadget.

[[folder: Brain]]
-->'''Voiced by:''' Creator/FrankWelker (original series), Lee Tockar (''Inspector Gadget's Last Case'', ''Inspector Gadget's Biggest Caper Ever''), Maurice [=LaMarche=] (''Gadget and the Gadgetinis''), Christian Pelissier (French voice), [[RemakeCameo Don Adams]] (1999 movie), Creator/JeffBennett (''Inspector Gadget 2'')

* ActionPet: Although more wacky than outright action, he still goes through things that one would have to be tough to get though.
* BeleagueredAssistant: Occasionally averted when Gadget actually ''saves'' Brain. This usually happens when Gadget thinks he's a MAD agent and is trying to capture him, and ends up grabbing Brain right before he'd fall to his death.
* DetectiveAnimal: He also helps Gadget solve cases.
* FacePalm: One of his frequent reactions to Gadget's antics.
* HeroicDog: He always stays close to Gadget to keep him safe during his missions.
* HyperCompetentSidekick: To Penny.
* IntellectualAnimal: He displays a great deal more situational awareness and common sense than the titular character, whom he must constantly protect from harm.
* MeaningfulName: Brain is a complete subversion of the DogsAreDumb trope.
* MyInstinctsAreShowing: Though usually a neurotic StraightMan with more human intelligence than most of the police force combined, Brain sometimes has displays of puppy-like friskiness. For example, at one point when Gadget tries to throw away some explosives, he mistakes it for a stick and excitedly plays fetch with it.
* NonHumanSidekick: He is a dog.
* ObfuscatingStupidity: Brain's French name of "finaud" and the lyrics of the French version of his theme song both allude to his hiding his competence behind his harmless outward appearance.
* PaperThinDisguise: He often tries to avoid suspicion by wearing a disguise. Ironically, it tends to backfire by having Gadget mistake him for a M.A.D. agent.
* PutOnABus: In ''Gadget and the Gadgetinis'', though he did guest star in one episode.
* SilentSnarker: Often makes expressions that show his disdain for the unfortunate events that happen while trying to help Gadget.
* SpeechImpairedAnimal: DependingOnTheWriter, but he is often TheUnintelligible.
* WhyDidItHaveToBeSnakes: Unlike Penny, Brain stays afraid of ghosts through the whole series.

[[folder: Chief Quimby]]
-->'''Voiced by:''' John Stephenson (pilot), Dan Hennessey (first season), Maurice [=LaMarche=] (second season), Jim Byrnes (''Inspector Gadget's Biggest Caper Ever''), Gérard Delmas and Roger Lumont (French voice)
-->'''Played by:''' [[Film/WarGames Dabney]] [[WesternAnimation/{{Recess}} Coleman]] (1999 movie), Mark Mitchell (''Inspector Gadget 2'')

* ButtMonkey: Every time Gadget receives a self-destructing message, Quimby will inevitably get stuck with the note exploding in his face.
* CatchPhrase:
** "Great job, Gadget! You've done it again!" (used when he shows up at the end of the episode to arrest the MAD agents);
** "Why do I put up with him?" Used in several episodes after the assignment message blows up in his face.
* DaChief: Not exactly as strict, but he has suffered a lot due to Gadget's incompetence.
* ChewToy: Without fail his 'self-destructing message' will be near him when it goes off.
* CompositeCharacter: Of the Chief of CONTROL and Agent 13 from ''Series/GetSmart'', which InspectorGadget could be considered a SpiritualSuccessor to. Like the former, Quimby gives orders and mission debriefings to the bumbling protagonist. Like the latter, he has a tendency to hide in different improbable locations while giving messages to Gadget.
* {{Jerkass}}: He's a complete jerk to Gadget in the sequel to the live-action film.
* JerkWithAHeartOfGold: In the first live-action film, he dismisses Gadget as being useless but later congratulates him for bringing down Dr. Claw.
* {{Leitmotif}}: [[ Chief Quimby's theme]] only lasts a few seconds, but it's played OnceAnEpisode when Gadget finds him to get the episode's assignment.
* MrExposition: He's the one who tells Gadget what Dr. Claw and M.A.D. are up to.
* PhraseCatcher: Gadget says "Is that you, Chief? You're where?" whenever Quimby contacts him on the Top Secret Gadget Phone.
* OnceAnEpisode: Chief Quimby shows up in every episode to give Gadget his assignment, and Gadget ends up giving it back to him when it self-destructs. In ''every'' episode. Quimby inevitably shows up again at the end of the episode to arrest the MAD agents and congratulate Gadget for completing his assignment.
* SomethingOnlyTheyWouldSay: Apparently, only the real Gadget would malfunction without warning and injure him with his gadgets. Quimby uses that fact to SpotTheImpostor in one episode.

[[folder: Corporal Capeman]]
-->'''Voiced by''': Townsend Coleman, Patrick Préjean (French voice)

* FatIdiot: He is rather portly and is even dumber than Gadget.
* HollywoodNerd: Capeman wears glasses.
* {{Jerkass}}: One of the reasons why most fans despise him is because he frequently picked on Brain for no apparent reason.
* {{Sidekick}}: Desperately wanted to be this to Gadget and became his sidekick when he inadvertently defeated the episode's M.A.D. agent.

[[folder:Dr. Claw]]

-->'''Voiced by:''' Frank Welker (original series), Don Francks (original series, some lines in "Race to the Finish", "M.A.D. Trap", "Basic Training"), Brian Drummond (''Gadget and the Gadgetinis'', ''Inspector Gadget's Last Case'', ''Inspector Gadget's Biggest Caper Ever''), Victor Désy and Georges Atlas (French voice)
-->'''Played by:''' Rupert Everett (1999 movie), Tony Martin (''Inspector Gadget 2'')

* AdaptationNameChange: Most incarnations of the character give him the name "Dr. Edward Claw", but the 1999 film (and, presumably, its sequel) gives him the AlliterativeName Sanford Scolex, with "Claw" only being a nickname.
* AmbiguouslyHuman: With a voice like that...
* AngryFistShake: He often shakes his fist after every defeat.
* ArchEnemy: Gadget and Claw consider each other to be personal enemies.
* BerserkButton: Just seeing Gadget, or even simply having to mention his name, can make Dr. Claw angry enough to smash holes in his desk or shatter diamonds with his bare hands.
* BigBad: He is the main antagonist, as he is the leader of M.A.D.
* BigEater: Movie!Claw was this sometime before the movie begins.
* CampStraight: In the live-action movie.
* CaptainErsatz: Of [[Film/JamesBond Ernst Stavro Blofeld]].
* CatchPhrase: "I'll get you next time, Gadget! ''Next time''!"
* TheChessmaster: Many of his plans involve steps taken to try and prevent Gadget from stopping him.
* CorruptCorporateExecutive: For the movie. Also any episode that revolved around MAD setting up a legitimate business and then wiping out their competition by some underhanded means, leaving Dr. Claw with a monopoly.
* DiabolicalMastermind: Quite a lot of his plans were complex, such as finding a sealed weapon of mass destruction or hiding stolen diamonds inside chocolates.
* EnfanteTerrible: Was implied to be one when he was a child. He mentions that he desired possession of the Crown Jewels since his youth in "Gadget's Clean Sweep", his mentor Les Renowned introduced in "Gadget meets the Clan" can be seen in a picture lecturing a younger Claw holding a lollipop, and the 1992 Christmas special had Dr. Claw mad at Santa Claus for never getting him the dirty tricks sled he wanted as a child.
* EvilLaugh: He frequently laughs when his EvilPlan comes along.
* EvilPlan: Just about every episode has him plan to do something evil. Some of his most heinous schemes involve setting up an enterprise while using underhanded methods to eliminate the competition, one example being in "Dairy Farm" when he has M.A.D. sell overpriced dairy products while using a device to prevent cows from other farms from giving milk.
* EvilSoundsDeep: He speaks in a deep, sinister, gravelly voice.
* ExactWords: From the episode "The Invasion": "I said ''I'' feel like singing!"
* TheFaceless:
** Not only faceless, but also bodiless as only his hands and arms are ever shown to the viewers. Luckily, in the movie, his whole appearance is [[MrFanservice Rupert]] [[HamAndCheese Everett]].
** His action figure however depicted his face. [[ Click at risk of shattering childhood memories]]. In a ''brilliantly'' devious ploy of marketing, the packaging for the figure covered up his face with a piece of cardboard inviting you to buy the toy and finally see what he looked like.
* FauxAffablyEvil: He sometimes acts nice and friendly, but it does nothing to hide the despicable person he is.
* HookHand: His origin in the movie.
* JokerImmunity: As shown in the second live-action film and the animated direct-to-video film Inspector Gadget's Biggest Caper Ever, not even capturing him and putting him in jail can stop Claw.
* KarmaHoudini: Usually played straight in that he always avoided getting arrested, but some episodes downplay it and have Claw suffer a minor problem as he makes his getaway, such as being trapped at the bottom of the arctic waters in "Gone Went the Wind", getting frozen in "The Quimby Exchange", and getting hit by the blast of the Red Rose potato gun in the final episode "Gadget and the Red Rose".
* LargeHam: [[EvilLaugh "HeeheeheeheeHAHAHAHAHAHAHAHA!"]]
* MeaningfulName: Subverted in the sense that he clearly does not have a claw, but metallic gloves instead.
* MorallyAmbiguousDoctorate: A villain named Doctor.
* RightHandCat: What Dr. Claw has (see MAD Cat below)
* SinisterSurveillance: The only thing he's ever shown doing.
* SlouchOfVillainy: Throughout the series, he only watches the events from his lair or car.
* SuperStrength: He's strong enough to crush a diamond with only one hand and bend a barbell.
* SurroundedByIdiots: Even with Penny always screwing up his plans, you sometimes think he might be ruling the world by now if his henchmen weren't all so stupid.
* UltimateEvil: While we never see him aside from his arms, the way some of his agents act intimidated while talking to him suggest that he's always hidden because his appearance is terrifying.
* UnknownRival: Claw is so focused on Gadget that he completely fails to realize that it's ''Penny'' who manages to undo his plans in the end.
* VileVillainSaccharineShow: Gadget himself and many other characters tend to be goofy and prone to slapstick, whereas Dr. Claw is a sinister villain who speaks in a deep, ominous voice. Several of his plans even involved trying to ''kill'' someone.
* VillainDecay: In the 2015 series. Story-wise, he is theoretically either out of practice or losing his touch.
* VillainExitStageLeft: Whenever he's actually at the scene of a MAD activity, he'll typically escape in the MAD Mobile once the Gadget family ruins his scheme.
* WeWillMeetAgain: "I'll get you next time, Gadget! ''Next time''!"
* WouldHurtAChild: The rare moments he catches Penny snooping around, he's usually not above putting her in harm's way, or at the very least, using her as bait for Gadget.
* YellowEyesOfSneakiness: When his face is briefly shown in the SNES game.

[[folder:MAD Cat]]

* ButtMonkey: Can occasionally be this to some of [[BadBoss Dr. Claw's]] tantrums.
* CatsAreMean: [[ThePiratesWhoDontDoAnything Supposedly.]] He doesn't really do anything evil, though, and in many cases he actually comes off as more of a victim to Dr. Claw's outbursts.
* EvilLaugh: Has a great one made of cat hisses. It's pretty much [[ThePiratesWhoDontDoAnything the only way you can tell]] that he's a bad guy.
* GenderFlip: Is female in the 2015 series.
* RightHandCat: [[CaptainObvious What MAD Cat is.]]
* ThePiratesWhoDontDoAnything: He's a villain, but does little aside from lounging around while Dr. Claw either pets him or takes his anger over failed plans out on him. Averted on a few rare occasions when he pushes a button on Dr. Claw's computer or on the MAD Mobile's control panel.
* ProgressivelyPrettier: Much more adorable in the 2015 series.
* SilentSnarker: He sometimes rolls his eyes while Dr. Claw gloats.
* SpeechImpairedAnimal: Unlike Brain, who occasionally says a few words in a Scooby Doo style of beginning every word with "R", M.A.D. Cat doesn't actually talk aside from laughing and meowing.
* TeamPet: An evil team's pet.

[[folder:The Great Wambini and the Lesser Wambini]]
-->'''Voiced by:''' Louis Nye (Great Wambini), Frank Welker (Lesser Wambini), Christian Pelissier (French voice of Lesser Wambini), Yves Barsacq (French voice of Great Wambini)

* KarmaHoudini: Are the first of the second season's recurring M.A.D. Agents that avoid arrest.
* MeaningfulName: The Great Wambini is a highly skilled magician while his lackey the Lesser Wambini is only capable of lame and underwhelming tricks.
* StageMagician: Their usual disguise.
* ThoseTwoBadGuys: They are never seen without one another.

[[folder:Professor Dummkopf]]
-->'''Voiced by:''' Louis Nye, Serge Lhorca (French voice)

* BeardOfEvil: He has a big brown shaggy beard.
* HerrDoktor: He has the accent and his name is even a German word.
* KarmaHoudini: He never gets arrested in any of his appearances.
* MadScientist: In his three episodes, he has tried to use a shrink ray on Gadget as well as sending a quintet of imps and a hulking brute he created himself to kill him.
* PaperThinDisguise: He often uses one in the episodes featuring him.
* UnfortunateNames: His surname is German for "idiot".

[[folder:Dr. Spectrum]]
-->'''Voiced by:''' Louis Nye, Patrick Préjean (French voice)

* BaldOfEvil: He has no hair.
* KarmaHoudini: Yet another recurring M.A.D. Agent who never gets caught.
* KnightOfCerebus: Unlike most of the mad scientist M.A.D. Agents on the show, he has very few humorous traits and "Bad Dreams are Made of This", one of the episodes featuring him, is DarkerAndEdgier as it involves everyone in Metro City being tormented by bad dreams and even has Brain experiencing a nightmare where it is implied that M.A.D. Cat killed him.
* MadScientist: He's invented tablets that become "ghosts", a device that enables people to teleport through telephones, and a machine that makes people suffer nightmares.

[[folder:Dr. Null and Dr. Void]]
-->'''Voiced by:''' Andy Goldberg (Dr. Null), Frank Welker (Dr. Void)

* CreepyTwins: They are both virtually identical.
* KarmaHoudini: They never get captured in any of the three episodes featuring them.
* VerbalTic: In their first appearance, they would often say the exact same phrase, but with differing usage of words. They reprise this in their third and final appearance.

[[folder:Thelma Botkin]]
-->'''Voiced by:''' Rita Taggart, Jeanine Forney (French voice)

* KarmaHoudini: She is seen arrested at the end of the first episode with her, but the next has her free and back with MAD with no explanation. She does not get arrested in her next two appearances.
* TimeTravel: Her episodes had her attempting to go back in time and kill Gadget's ancestors.

[[folder:Les Renown]]
-->'''Voiced by:''' Ronald E. House, Patrick Préjean and René Bériard (French voice)

* GreaterScopeVillain: He is Dr. Claw's mentor and therefore is indirectly responsible for the existence of Claw's crime organization M.A.D.
* KarmaHoudini: The final recurring "villain" of Season 2 who is never arrested, although whether or not he really is a Houdini is arguable since he isn't really seen committing any crimes other than conspiracy (he introduces Dr. Claw to other elderly criminals who do get arrested at the end of their respective three episodes).
* OldMaster: At least Dr. Claw seems to regard him as one; Claw claims Renown mentored him in the criminal arts.
* PunnyName: His name is a pun on "less renowned", referring to how Dr. Claw is more well known than he is.