[[folder:Main Characters]]

! Cat
-> Voiced by: Creator/JimCummings
* AbhorrentAdmirer: Occasionally portrayed as this towards Shriek.
* ButtMonkey
* {{Catchphrase}}: "Bee-yoo-tee-ful!"
** "It just doesn't get any better than this!"
** "Terr-riffic" (sarcastically)
** A deep-voiced "Ohhh MOMMA" when he's feeling greedy.
* CatsAreMean: Sometimes.
* CatsAreSnarkers: And how! [[spoiler: He gets it from his dad]].
* TheChewToy: Poor guy can't seem to catch a break.
* [[ADogNamedDog A Cat Named Cat]]
* {{Greed}}
* [[spoiler:HappilyAdopted]]
* JerkWithAHeartOfGold
* [[spoiler: LikeFatherLikeSon]]
* MrViceGuy: He can be greedy, and cross the line into villainy, but most of the time he is the hero.
* NeatFreak
* NoRespectGuy
* SmallNameBigEgo
* SurroundedByIdiots: He's even attached to one!
* ThisLoserIsYou
* TrademarkFavoriteFood: White fish chub. And fish in general.
* [[WhyDidItHaveToBeSnakes Why Did It Have To Be Water?]]

! Dog
-> Voiced by: TomKenny
* {{Adorkable}}: Has shades of it.
** [[spoiler:So does his mother.]]
* BewareTheNiceOnes: Cat once learned the hard way not to ''actually'' make Dog angry.
* BigEater
* {{Catchphrase}}: Hi-ho diggedy!!
** Dog even ''calls'' it his catchphrase!
** [[spoiler: He gets it from his mom]].
* CloudCuckoolander
* ADogNamedDog: Literally.
* TheDitz
* DogsAreDumb
* DumbIsGood
* TheFool
* [[spoiler:HappilyAdopted]]
* IdiotHoudini: Dog is a hyperactive dimwit that causes chaos with his canine tendancies, it is usually Cat that suffers the consequences for it however.
* JerkassBall: Sometimes.
* {{Keet}}
* LethallyStupid
* [[spoiler: [[LikeFatherLikeSon Like Mother Like Son]]]]
* ManChild[=/=]PsychopathicManchild: DependingOnTheWriter.
* TheMillstone
* PingPongNaivete
* TooDumbToLive
* TrademarkFavoriteFood: Bones, moldy meat and garbage.


[[folder: Supporting Characters]]

! Winslow
-> Voiced by: Creator/CarlosAlazraqui
* BrattyHalfPint
* CatchPhrase: "What are you, nuts!?"
* DeadpanSnarker
* EvilLaugh: His signiature cackle.
* InformedSpecies: He's allegedly a mouse, but looks more like a [[Franchise/TheSmurfs Smurf]].
* {{Jerkass}}: The majority of the time, mostly to Cat.
** JerkWithAHeartOfGold: Deep down, he cares about [=CatDog=].
** JerkWithAHeartOfJerk: But, as seen in his final scene in the GrandFinale, not ''that'' much.
* TheNapoleon
* SitcomArchNemesis: To Cat.
* SmallAnnoyingCreature: Invoked. He considers himself a "harasser".

! Mervis and Dunglap
-> Voiced by: John Kassir
* {{Nerd}}s
* MessyPig: Mervis, for a given definition of "messy".
* OnlySaneMan: They are the only normal characters in the series.
* ThoseTwoGuys: They don't seem to serve any other purpose than this.
* VitriolicBestBuds: Often seen bickering and yet are always together.
* WickedWeasel: Averted with Dunglap.

! Mr. Sunshine
-> Voiced by: BillyWest
* BystanderSyndrome: He'd probably be the OnlySaneMan if he didn't succumb to this all the time.
* CartoonCreature: Nobody's quite sure ''what'' he is.
** WordOfGod says he was originally supposed to be a monkey.
* DeadpanSnarker: Sometimes.
* TheEeyore: Subverted; he isn't so much depressed as he is boring and deadpan.
* IronicName: He's anything but sunny.
* LazyBum
* TheLoad
* PerpetualFrowner
* TheStoic
* WhyDoYouKeepChangingJobs

! Lola Caricola
-> Voiced by: Nika Frost
* ActionGirl: She gained her love of zoology after helping her family wrangle cattle. Not to mention the fact that she can go toe to toe with ''the Greasers''.
* ArtisticLicenseOrnithology: She looks and acts nothing like the type of bird she's supposed to be.
* CatchPhrase: "Unbelievable!"
* ForScience: Most everything she does. Justified because she's a zoologist.
* GenkiGirl
* InformedSpecies: She's apparently a whip-poor-will. Specifically, she says that she's a "yellow-bellied whip-poor-will", a species that doesn't even ''exist'' in real life.
* TheLadette
* NiceHat
* OnlySaneWoman: To some degree.
* SmallAnnoyingCreature: overthetop, loud, repetitive, especially with catch phrase
** NotSoAboveItAll: But she's always willing to join in with [=CatDog's=] shenanigans.
* PhraseCatcher: [[RhymesOnADime "Hola Lola]]", usually said by Cat.
* PunnyName
* ShipTease: Occasionally seems to flirt with [=CatDog=], although that was mostly in her first appearance.
* SlapstickKnowsNoGender: She's not immune to the AmusingInjuries everyone else on the show gets.
* TheSmartGuy
* SpicyLatina
* TheThingThatWouldNotLeave: In her first appearance.

! Randolph Grant
-> Voiced by: Creator/BillyWest
* AmbiguouslyGay: Overall the mannerisms of this celeb and posh stylish character show hints of being gay and at times he seems to have a thing for Dog, especially in episodes CatDog's End, Dog the Not so Mighty, and Dog Ate It.
* CatchPhrase: "And I LOVE it!"
* UpperClassTwit: Granted he's a relatively amicable one.
* WhyDoYouKeepChangingJobs: Downplayed; he's probably the only celebrity in Nearburg.

! The Ingrid Twins
-> Voiced by: Laraine Newman
* AlwaysIdenticalTwins: They look alike and even have the same name.
* OppositesAttract: In one episode, it's shown that the GenkiGirl Ingrid likes DeadpanSnarker Cat and the DeadpanSnarker Ingrid likes [[{{Keet}} Genki Guy]] Dog.
* SexyScandinavian: Both are beautiful blondes and presumably Swedish, sharing a stereotypical Scandinavian name.
* ShipTease: They often appear on dates with [=CatDog=].
* SiblingYinYang: One of them is a GenkiGirl and the other is a DeadpanSnarker, hence why they're pretty much perfect for our conjoined duo.
* [[ThrowTheDogABone Throw The CatDog A Bone and Fish]][=/=][[YankTheDogsChain Yank The CatDog's Chain]]: Depending on the occasion, they can end up doing one, the other or [[TakeAThirdOption both]].


[[folder: Antagonists]]

! The Greasers
-> Voiced by: Creator/TomKenny (Cliff), Maria Bamford (Shriek), Creator/CarlosAlazraqui (Lube)
* [[spoiler: BolivianArmyEnding]]: They're last seen [[spoiler: getting eaten by a giant sea monster. The reason it's this and not [[KilledOffForReal a certain other trope]] is because Cat, Dog and their parents all survived the same fate, so it's possible that the Greasers would get out too ([[SeriesFinale not that it really matters]])]].
* BrattyHalfPint: Shriek
* EmbarrassingFirstName: Cliff's name is short for Clifford, which he isn't proud of. Shortly after, it's revealed that Lube's name is Ignatius.
* FantasticRacism: They really hate cats. Crosses over with AnimalJingoism because they're dogs.
* FatBastard: Cliff
* GangOfBullies
* HiddenDepths: All three of them have these. Cliff is very much [[RealMenWearPink in touch with his feminine side]], Shriek has a crush on Dog and is SecretlyWealthy and Lube is a skilled mechanic.
* [[{{Jerkass}} Jerks]]
* MeaningfulName: Shriek. She shrieks. Boy does she ''[[CuteButCacophonic shriek]]''
* [[LikeFatherLikeSon Like Parents Like Son]]: Lube's parents are shown in the finale, and they're just as dumb as he is.
* QuirkyMiniBossSquad: When Rancid is the BigBad, they're usually acting as his minions.
* RealMenWearPink: Cliff [[spoiler: takes ballet]]. He's not only really good at it, but he's also really ''proud'' of it.
* SecretlyWealthy: Shriek. [[RebelliousPrincess She really hates it, though]].
* SlapstickKnowsNoGender: Whenever Lube and Cliff get [[AmusingInjuries injured amusingly]], Shriek isn't spared just because she's a girl.
* SpoiledBrat
* TerribleTrio
* TokenGoodTeammate: Lube is not only the nicest Greaser, he's probably the nicest character in ''the entire show''.
* TrueCompanions: [[DependingOnTheWriter Several episodes]] show them to be this. They may be rather nasty bullies, but they stick together.
* VillainousCrush: Shriek has a crush on Dog. Strangely enough, ''Cat'' seems to be attracted to her.
** A few episodes suggest that Dog reciprocates Shriek's crush. In one where they're all convinced that the apocalypse is coming, Shriek confesses to and kisses him, prompting Dog to go into PostKissCatatonia with a big goofy grin on his face.
* YouAreWhatYouHate: [[spoiler:The SeriesFinale reveals that Lube is part-cat]].

! Rancid Rabbit
-> Voiced by: Creator/BillyWest
* BigBad: Nearly every episode he's in has him as the main antagonist.
** BigBadWannabe: Deteriorates into this as the show went on.
* CatchPhrase: "Leaping lumbago!" and "What what WHAT!?"
* CorruptCorporateExecutive: It's implied that he actually ''owns Nearburg''.
* TheDitz: Sometimes.
* EvenEvilHasStandards[=/=][[PetTheDog Pet the CatDog]]: Seeing [=CatDog=] swarmed with psychotic fleas and the flea belt no longer being enough to help them is enough to convince him to give them a flea bath with no apparent ulterior motive.
* FatBastard
* {{Jerkass}}
* WhyDoYouKeepChangingJobs: Subverted. He doesn't change jobs, he has ''all the jobs''.

! Eddie the Squirrel
-> Voiced by: Dwight Schultz
* BrattyHalfPint
* HarmlessVillain
** NotSoHarmless: He almost killed Lube with a tick at one point and built a giant robotic cat to get revenge on the Greasers and enslave the town.
* IneffectualSympatheticVillain: Heavy on the ineffectual, light on the sympathetic.
* InformedSpecies: He's supposed to be a squirrel?
* {{Jerkass}}
* MotorMouth: Nobody can shut the little twerp up.
* SmallAnnoyingCreature

! Tallulah Headbank
-> Voiced by: Maria Bamford
* BitchInSheepsClothing: A gorgeous movie star who is also vain and snobbish.
* BlondesAreEvil: Well, maybe not evil, but definitely snobbish and mean.
* CatsAreMean
* CelebCrush: Cat has one on her.
* {{Jerkass}}: Noticing a pattern here?
* NiceCharacterMeanActor: Tends to play sweet love interests, but is a huge snob.
* NoCelebritiesWereHarmed: A spoof of Tallulah Bankhead.
* [[PetTheDog Pet the CatDog]] and then [[YankTheDogsChain Yank the CatDog's Chain]]: She declares Cat her soulmate when he reveals that he has every quality she's looking for...right until Cat accidentally burns her dog.
* RichBitch: Very rich, very nasty.
* WhatDoesHeSeeInHer: With all the hate and abuse she dishes out on Cat whenever he's around her, you'd think he would've given up on her by now.

! "The Mailman"
* ArchEnemy: To Dog.
* BigBad: Of "Fistful of Mail".
* FormerlyFat: [[spoiler:As the Paperboy, he was so chubby as to be unrecognizable as a slender, sleek adult. An interesting example, as its only relevance to the plot is to reveal just why Dog didn't recognize him at first]].
* GoldTooth: Which signals to Dog that he's [[spoiler:the Paperboy all grown up]].
* {{Jerkass}}
* NiceHat: In keeping with his "Cowboy" theme.
* NoNameGiven
* SchoolyardBullyAllGrownUp: [[spoiler:Used to be a paperboy who mocked Dog for being too slow to get the newspapers he threw]].
* SlasherSmile: Wears one whenever he's not being a SmugSmiler.
* SmugSnake: An appropriately reptilian one too, though he's a lizard.
* SuperSpeed: His specialty. He's the first [[spoiler:and last]] mailman to surpass Dog in speed.
* UnstoppableMailman: The first mailman Dog couldn't stop. [[spoiler:Until the end, that is]].
* VillainousBreakdown: [[spoiler:Has one after Dog defeats him]].


[[folder:'''Spoiler Characters''']]
! [=CatDog's=] parents
* BigfootSasquatchAndYeti: [[spoiler:The mom looks like this kind of creature. None of the other characters know what she is, not even her husband]].
* CatchPhrase: Dog got his from the mom.
* DeadpanSnarker: The dad, which is where Cat gets it. Seeing his father make the same sarcastic remark he makes is what ultimately leads Cat to accept that these two are indeed his parents.
* GenkiGirl: The mom, which is where Dog gets it. They bond almost instantly.
* GoodParents: They loved [=CatDog=] dearly, even though [[spoiler:they weren't their biological parents]]. When they were separated, the two of them spent almost their whole lives searching for their sons.
* HappilyMarried
* InterspeciesAdoption: [[spoiler:They adopted [=CatDog=] when the two of them were babies]].
* InterspeciesRomance: [[spoiler:The dad's a frog, the mom is a big blue Sasquatch looking thing]].
* LikeFatherLikeSon: Dog takes after the mom, Cat takes after the dad.
* MamaBear and PapaWolf: To [=CatDog=]; they spent years searching for them after they were separated.
* WalkingSpoiler: Knowing too much about them spoils the SeriesFinale.
* WhamLine: The mom has one when she finally speaks:
-->'''[=CatDog=]'s Mom:''' HI HO DIGGETY!