[[quoteright:219:http://static.tvtropes.org/pmwiki/pub/images/Catdogeating.JPG]]
[[caption-width-right:219:[[WesternAnimation/TheSimpsons "Twice the pet and none of the mess!"]]]]

--->''One fine day with a woof and a purr,''
--->''A baby was born and it caused a little stir''
--->''No blue bug, no three-eyed frog,''
--->''Just a feline, canine, little [=CatDog=]''
---> ''[=CatDog=], [=CatDog,=]''
--->''Alone in the world was a little [=CatDog=]!''

'''''[=CatDog=]''''' was an animated series that first aired on {{Nickelodeon}} in 1998 and ran for three seasons. It is the 8th [[Franchise/{{Nicktoons}} Nicktoon]] created for the channel.

The story revolved around [=CatDog=], two conjoined twins [[ExactlyWhatItSaysOnTheTin who were a cat and a dog respectively]]. Cat was the sophisticated one, being into things such as the Opera and cleanliness. Dog, on the other hand, was much more laid back than his brother and enjoyed going on adventures and eating. The episodes revolved around Cat and Dog's daily adventures of living with each other and trying to avoid harassment from a gang of three dogs named the Greaser Dogs and their neighbor (who lives in one of the walls of their home) Winslow, a blue mouse.

Most people familiar with the show either [[LoveItOrHateIt liked or disliked it]], and it became one of Nick's most polarizing programs. Despite this, it does have a decent fanbase.

The show now reruns in the block Series/The90sAreAllThat. The series is currently released in DVD by Creator/ShoutFactory.

Has a [[Characters/CatDog character page]] and a [[Recap/CatDog recap page]].

----
!! This animated TV show provides examples of:

* AbnormalAmmo: Due to how [=CatDog=]'s digestive system works, if Cat eats several small items, Dog can shoot them out of his nose with machine-gun force. They mainly use candies for this.
* ADogAteMyHomework: Cat tries to make money off this in one episode by letting people hire Dog to eat their homework for them. Even the President ([[WhyDoYouKeepChangingJobs Rancid again]]) asks them to eat his speech. However, Dog suffers a moral crisis before he can do so, so Cat has to eat it. Nobody believes that a cat could eat homework, so Rancid is booed off the podium and goes back into the clowning business.
* {{Aesop}}: Noteworthy subversion is when Cat teaches Dog not to eat meat as animals are his friends. Dog then starts seeing plants asking him to be his friends, so he started eating rocks, but they asked him to be friends too........eventually, he resorted to eating Cat because he is his brother, not his friend. In the end, Dog gets to eat meat from steak plants instead.
* AHeadAtEachEnd: The whole premise of the show.
* AllJustADream: In "Shriek Loves Dog", Cat plans to make Dog and Shriek fall for each other, hoping that the Greaser Dogs will thereby leave him alone. The rest of the episode is Cat's dream of what the consequences are: Dog marries Shriek, which causes the Greaser Dogs to move into their house and generally making Cat's life a living hell.
** Also happens in "Dem Bones." The episode seemingly ends with [=CatDog=] in [[ItMakesSenseInContext museum jail,]] but it turns out to be just a dream Cat had.
* AlliterativeName: Rancid Rabbit and Evil Eric (Mean Bob's archenemy).
* AlternativeContinuity: The movie ignores some of the events and continuity of the show. This was possibly done to make the movie more accessible to viewers who weren't fans of the show.
* AmbiguouslyGay: Eddie the Squirrel
* AnimalJingoism: The Greasers hate cats, and this is one of the reasons why they regularly beat up [=CatDog=].
* AnimationBump: The episode "Fetch" was made to be shown before the ''{{Rugrats}}'' movie, so it has theatrical-quality animation. This is very evident in the coloring of the characters.
* AnthropomorphicFood: The boss of Taco Depot appears to be a taco.
* AprilFools: "Kooky Prank Day." Cat is on the receiving end of every prank in Nearburg, but by the end, he's turned the tables with a very impressive, very complex prank.
* ArtShift: The episode where [=CatDog=] dream of themselves as separate animals.
** The theatrical short, "Fetch," has more detailed animation and layouts, with shading and such.
* AttackPatternAlpha: '''Cat-Dog Wheel!'''
* [[ItsAWonderfulPlot A Wonderful Half-Life]]: A well-named example of a subversion. Instead of imagining a world without themselves, they imagine a world without each other.
* AwLookTheyReallyDoLoveEachOther: Cat has moments like this towards Dog, usually when Dog's been utterly humiliated.
** In "Full Moon Fever," Dog turns into a wolf-like form in the full moon. Cat decides to let Dog "get it out of his system" and he ends up joining the Greasers. Dog passes their initiation test, making Cat miserable all the while. He passes and they accept him, and even give him a tail by putting a plunger on Cat's head. Dog then looks at how miserable his brother is... [[HeartwarmingMoments and changes to his normal self]] because he doesn't want to see his brother suffer.
* AxCrazy: Cat in the episode "Monster Truck Folly". Although it could also count as a CrazyAwesome.
* BabysittingEpisode: In one episode, they have to babysit Cliff's niece. She eventually gets lost and when Lube comes to pick up the baby, they pass off Winslow as the baby and go look for her. They manage to get her back in enough time that Cliff doesn't find out.
* BadFuture: Accidentally created when Cat made fun of Winslow for being small and puny, resulting in his distant descendant becoming an EvilOverlord. DisproportionateRetribution much?
* BaseballEpisode: In "The Unnatural," [=CatDog=] competes in a baseball game. Cat is a terrible player, but Dog isn't. Cat eventually gets the idea to pretend he is Dog and vice-versa so he'll look like a better player. In the end, he takes off his mask and tries to hit the ball himself... but he fails. However, Cat realizes that he's good at other things and decides that he doesn't need to be a good baseball player after all.
* BeachEpisode: In "Surfin' [=CatDog=]," [=CatDog=] goes to the beach and competes in a surfing contest against the Greasers. [[ThrowTheDogABone They win.]]
* BerserkButton: Eddie & [[spoiler: Rancid Rabbit in Let The Games Begin]]
* BeYourself: Tough-acting tomboy Shriek tries to make herself "a real woman" so that Dog will take notice of her. It backfires when every guy except Dog ends up hitting on her.
* BigEater: Dog. Though Cat has put a lot of fish away at times.
* BitingTheHandHumor
* BlackComedy
* BootCampEpisode: [=CatDog=] gets a military-style experience... at a ''clown school''.
* CarnivoreConfusion: Deconstructed. Dog goes insane after realizing that all the meat he's been eating has been living people that he hangs out with all the time.
* CartoonCreature: Mr. Sunshine. Lampshaded on several occasions where no one is sure what kind of creature he's supposed to be.
** WordOfGod has it he was originally meant to be a monkey.
* {{Catchphrase}}: Several:
** Cat: "Bee-yoo-tee-''ful!''", "It just doesn't get any better than this!", a sarcastic "Terr-riffic", and [[AmusingInjuries "MY BODY MY BODY MY BODYYYYAAAGH!!!"]]
** Dog: "Hi-ho-diggety!" and [[CaptainObvious "Two heads are more than one!"]]
** Winslow: "What are you, nuts?", and "Sheesh Louise!"
** Rancid: "What, what, what?!" and "Leaping lumbago!"
** Lola: "[[GratuitousSpanish Hola]], I am Lola!" and "Unbe''lieve''able!"
** Randolph: "And I ''love'' it!"
* CanadaEh: Mervis and Dunglap.
* CatsAreMean: Cat serves as a minor example, as he is more a greedy and self-centered jerk than cruel or vicious. He's even had his own moments of kindness and generosity. The cats of the Cat club however play this straight to a frightening degree.
* CatsAreSuperior: If either of the duo tries to accomplish something due to egotistical concerns, it's Cat. In general, he is also much more cunning and calculating than Dog. However, this means squat when Karma seems to have it out for him throughout the whole series, and rightfully so.
* CatsHateWater: Cat definitely fits this trope.
* CatsHaveNineLives: In one episode, Dog accidentally unleashes Cat's other eight lives, and they have to get them back.
* ChaoticStupid: Cat will make anyone mad when the town has a crisis, even the police.
* ChasteToons: This show had a ''lot'' of them.
** Rancid's niece Rancine appeared in the ChristmasEpisode, and is a spoiled brat.
** In "Back to School" we meet the Greasers' nephews, Biff, Squeak and Bartholomew. The latter is actually smarter than his uncle Lube.
** Brat and Runt, Winslow's nephews, appear in "Harasslin' Match." They start out nice to [=CatDog=] but after they kick Winslow out, they become even worse than him to the point that they [[BetterTheDevilYouKnow want Winslow back]].
* TheChewToy: Played as straight as can be with Cat. Nearly every character has the odd bout of ''extremely'' bad luck however.
* ChristmasEpisode: Rancid's niece Rancine wants [=CatDog=] for Christmas. Cat sells themselves to Rancid because he'll get a sports car if he does, and Santa (who'd already been disillusioned with the Christmas spirit) gets so angry about it he cancels Christmas. When Nearburg hears about it, they're all pissed off at [=CatDog=]. Thankfully, they manage to set everything right in the end and even get the Greasers to stop pounding them to celebrate Christmas.
* {{Cloudcuckoolander}}: Dog.
* ColdTurkeysAreEverywhere: When your girlfriend looks like a pizza, maybe you should stop for a snack...
** To make preparations for a dancing contest, Cat puts an overweight Dog on a diet so he will be fit enough for the competition. This was often met with many setbacks because Dog kept hidden stashes of food which he ate while exercising. Eventually, under threat of disqualification, Dog relents and loses enough weight for the competition. This backfires where a starving Dog starts to [[MeatoVision hallucinate his surroundings as food]] (he envisions his dancemates as pizza pies and drum sticks as chicken legs). Dog finally breaks and proceeds to devour not only the buffet, but his dance mates and the entire theatre!
* ConeOfShame: Dog gets one in "Cone Dog." Cat discovers he can hear far-away things closer because of it, and decides to use it to blackmail people with their secrets. He then goes mad with power and starts to blackmail the entire ''world,'' putting Dog in ever-increasing Cones of Shame until he's in a dome-sized one.
* ConjoinedTwins: [=CatDog=].
* ConspicuouslyLightPatch: In the taco restaurant in the episode "All You Can't Eat" where [=CatDog=] crawl under the floor tiles and you can see the path they take outlined on the tiles, for example.
* CorruptCorporateExecutive: Rancid Rabbit usually holds this position no matter where he is.
* CrapsackWorld: Nearburg, probably because of Rancid.
* CrazyPrepared: Cat is the only person in the entire town who has a Species License.
* DarkerAndEdgier: "The Great Parent Mystery" is definitely more serious than the series.
* DarkHorseVictory: CatDog and Mindy Wonderful are climbing a mountain, and the first to the top will have the mountain named after them. The winner is [[spoiler:Dunglap.]]
* DeadpanSnarker: Winslow and Cat.
* DependingOnTheWriter: Is Cat a JerkAss that deserves his ButtMonkey treatment, or just a mildly sarcastic and cynical guy who [[DesignatedMonkey gets unfairly tortured]] [[CrapsackWorld by the rest of the universe]]?
** Similarly, is Dog a well meaning guy that is [[HanlonsRazor just too stupid to realise the trouble he causes his twin]], or a PsychopathicManchild who just doesn't care one way or another? It doesn't help that the extent of his stupidity also varies from episode to episode.
* DerangedAnimation
* DiabolusExMachina: One of too many examples: [=CatDog=] accidentally create an [[ImpossiblyDeliciousFood extremely delicious candy]] that gives them worldwide fame and fortune. At the very end, it's revealed that it also has the unintended side effect of making people go bald, and everyone hates them again.
* DinosaurDoggieBone: There's one episode where Dog steals all the dinosaur bones from the Nearburg museum.
* TheDitz: Lube and Dog
* DogsAreDumb: Dog fits this trope perfectly.
* ADogNamedDog: And a cat named Cat.
* DumbIsGood: Cat is intelligent and a bit of a JerkAss, and acts as the show's key ButtMonkey. Dog for the most part is well intentioned but causes twice as much chaos via accidental stupidity and is a walking KarmaHoudini (that said, there are times where Dog gets away with being a genuine JerkAss).
* EarnYourHappyEnding:[[spoiler: In ''The Great Parent Mystery'', after their hardest quest yet.]]
* EarlyInstallmentWeirdness: Lube has a completely different character design in the pilot episode.
* EarsAsHair: The Better Bottoms rabbit wears his ears in a sleazy ponytail style.
* TheEeyore: Mr. Sunshine
* EnemyMine: Happens at least twice with the Greasers.
** In "Let the Games Begin," both [=CatDog=] and the Greasers end up in the dog pound. Rancid Rabbit says he'll let them go if they compete in the dog pound Dogathlon against a team from Farburg. They fight amongst each other and lose the events until they decide they have to work together to get out of the situation.
** In "New Cat in Town," [=CatDog=] makes friends with a giant cat who's out for revenge on the Greasers. They manage to trap the Greasers, but it then turns out that the giant cat was a robot controlled by Eddie the Squirrel, who goes insane and decides to enslave Nearburg. [=CatDog=] and the Greasers have to team up to stop Eddie, and eventually they do.
* EpisodeTitleCard
* ExpositoryThemeTune: "One fine day with a woof and a purr..."
* {{Expy}}: ''Theatre/TheOddCouple'''s 1975 AnimatedAdaptation ''WesternAnimation/TheOddballCouple'' also featured the adventures of a neatnik cat and slovenly dog, albeit as separate entities.
* FantasticRacism: If the constant beatings Cat receives from the Greasers primarily for his species doesn't count then one episode's upper class cult of cats with Nazi-esque plans to exterminate dogs certainly does.
* FantasticVoyagePlot: Done in several episodes where Cat eats several objects, Winslow- and a fish named Veronica and has to venture inside Dog to get her.
* FatBastard: Rancid Rabbit.
* FatIdiot: Rancid Rabbit (again).
* FeudEpisode: There's quite a few. "Dog Come Home" features Dog deciding to leave Cat and live on his own. They reconcile by the end of the episode.
* FireBreathingDiner: Happens a few times.
** In "You're Fired," when [=CatDog=] manages to get entry into a classy restaurant, Dog can't keep away from the chili peppers. They cause Cat to belch out flames, which helps him attract his "soulmate" Tallulah by broiling her steak for her. It soon backfires when he accidentally burns her pet dog into ashes.
** In "Spaced Out," [=CatDog=] gets trapped in a movie, and to destroy the enemy forces, Cat gulps down a box of Dog's favorite candy, Red Hot Lip Smackers, into his mouth and uses Dog as a pistol to burn the alien ships.
* TheFool: Dog frequently [[TheMillstone causes multiple catastrophes]] and AmusingInjuries with his stupidity though more often than not fate is on his side and leaves him unscathed (and then punishes Cat twice as hard for the both of them).
* Foreshadowing: Early in TheMovie, Dog makes a comment about remembering his and Cat's mother's "four eyes" and their dad's "slimy green skin." [[spoiler: The dad is a frog who hides himself in the mother's face.]]
* FourthWallMailSlot: A short in the first episode featured a mail segment. When they had no mail, Dog resorted to making up a question and answering it. In the end, though, it turns out Winslow was hiding the mail from them.
* GiftOfTheMagiPlot: Happened in the episode "Brothers Day", then subverted when Dog sold Cat's gift after buying it to buy something for himself. More specifically, Dog gave up his pool of mud that he and Cat wrestled in to buy Cat a loufa case. Cat sold his loufa to get Dog a mud wrestling costume. Dog reveals that he sold the loufa case and got Cat a mud wrestling outfit as well, because "I looked up the recipe for mud, and it's really easy to make!"
* GRatedDrug: Whatever Eddie had to make him go hyperactive.
* GettingCrapPastTheRadar: This exchange between Rancid and Lube:
-->'''Rancid:''' (after giving orders) "Now show some class!"
-->'''Lube:''' *turns around and drops his pants*
-->'''Rancid:''' "I SAID ''CLASS''!
** In "Winslow's Home Videos", the short that aired before the ''{{Rugrats}}'' movie, Cat tells Dog that the tacos he's eating have to "pass through ''our'' colon."
** The first line of the theme tune, really.
** Do NOT call Cat a pussy[[spoiler:cat]].
** The title card for "Cliff's Little Secret" shows Cliff [[VisualInnuendo coming out of a closet]]
** In the song everyone sings during the Parents Day activities in "The Great Parent Mystery," one time they say "Scratch our Nuts."
** Cat looking through a telescope at the night sky, telling Dog that he's trying to admire some 'heavenly bodies'.
-->'''Dog:''' "Wow, you can see the BEACH from here? Lemme see!!"
** After [=CatDog=] was swallowed by [[spoiler:Veronica]], Dog asked Cat how to get out of [[spoiler:Veronica's]] stomach. Cat then replied "Dog. You don't want to know."
** Come to think of it, the entire scene where Cat is lying awake in bed while Dog is asleep, the unbearable desire to eat [[spoiler:Veronica]] he is experiencing, the creepy, dirty thoughts he has, trying to keep himself from eating [[spoiler:Veronica]], telling himself that he has self control, and that Dog would never forgive him, and finally acting on these thoughts and eating [[spoiler:Veronica]]...that can all be taken another way, if you replace the word "eat" with the word "rape," it gets fairly disturbing.
* GodGuise: An episode had [=CatDog=] land on a tropical island and get mistaken for a god called the Great Meow-Woof. Rancid Rabbit, the previous god, was not happy and tried to run them off the island.
* GrandFinale: TheMovie titled "The Great Parent Mystery".
** They still made 5 episodes after that, which were not aired in the USA until years after the fact.
* GratuitousSpanish: Lola
* GymClassRopeClimb: In "Back to School," Cliff is the gym teacher, and takes joy in making the students do this. Cat manages to do it successfully, however, humiliating Cliff in the process.
* HappilyAdopted: [[spoiler: [=CatDog=] themselves]].
* HalloweenEpisode: Dog is bitten by a Peruvian vampire tick and turns into a vampire. Cat, who's wearing a garlic lei for his costume, is not affected. Lola tells Cat that this can be reversed if he soaks Dog in garlic juice by the twelfth stroke of midnight. Over the course of the episode, everyone turns into vampires, but Cat manages to soak everyone in garlic juice before the time is up.
* HeroicDog: Dog tries to become a literal one in "Dog the Mighty." He's not that good at it until the end, when he manages to really save the day.
* HiddenDepths: Each of the Greasers has at least one trait they kept secret or never bothered telling anyone about.
* HistoricalInJoke: "The House of [=CatDog=]" features a few of these. To protect their house from destruction, [=CatDog=] claims that their house was the site of the invention of fire, the signing of the Declaration of Independence, and a visit by TheBeatles.
* HorribleCampingTrip: In "[=CatDog=] Campers," [=CatDog=] have to camp outside to win the Forest Fire Boy of the Year award. It doesn't go well, as they start feuding, and eventually a storm comes up and destroys the tent. Winslow manages to save them from falling off the cliff outside their home, but at the Forest Fire Boys meeting, he reveals he became a member of the troop and wins the award for what he did. Cat gets so angry he ties Dog's ears in a knot, and it's such a good knot, Scoutmaster Rancid Rabbit takes the award away from Winslow and gives it to [=CatDog=] instead.
* HypocriticalHumor: Dog could be the poster child of InnocentlyInsensitive, obliviously causing endless pain and misery for Cat. The odd point Cat does something selfish at ''his'' expense however, he is quick to take offense.
* IceHockey: Rinky Dinks
* IdiotHero: Cat (although, he is meant to be smart).
* IdiotHoudini: Dog to extreme levels.
* ImpossiblyDeliciousFood: "[=CatDog=] Candy" from the episode of the same name. Unfortunately, it also makes you go bald.
* InevitableWaterfall: In ''The Great Parent Mystery.''
* InexplicablyIdenticalIndividuals: Rancid Rabbit holds a different job whenever he appears? Dentist, dog catcher, fast food restaurant manager, you name it. Taken to its logical extreme where he is seen working as a teacher and a traffic cop ''in the same episode.'' [[LampshadeHanging Cat is absolutely stunned.]]
* InformedSpecies: Eddie hardly looks like a squirrel.
** Lola is apparently a whip-poor-will. [[http://i1193.photobucket.com/albums/aa350/RichRonald/vlcsnap-2013-02-20-22h00m38s28_zps96a54207.png This]] is what Lola looks like. And [[http://www.nenature.com/Images/WhipPoorWillLMD.jpg this]] is what a whip-poor-will looks like.
* InterspeciesAdoption: [[spoiler:Catdog's parents are a ''frog'' and a ''sasquatch''. They were all separated from each other during a storm. When Cat questions how they could be their parents, their dad tells them that it doesn't matter, because [[GoodParents parents are parents]], and they loved them both. Dog does notice that it seems he got his nose from his mother though...]]
* JailBake: Subverted. A bunch of inmates receive a file, but Shriek uses it on her fingernails and then uses said fingernails to pick the lock.
* {{Jerkass}}: Lots and lots of characters. Rancid Rabbit, The Greaser Dogs and Winslow are some of the most obvious examples. Even Cat and Dog can arguably be these depending on the episode (Cat more often than not, as he has jerkass traits).
* JerkassHasAPoint: Considering how dumb, destructive, and uneducated Dog can be it's no wonder Cat can be a grouch sometimes.
* KafkaKomedy: This is the closest Nickelodeon ever came to "Schadenfreude: The Animated Show" arguably until InvaderZim. Much of the humor is based around the misery and utterly awful life of the main characters, juxtaposing Dog's blissful, optimistic ignorance with Cat's anguished, cynical resignation.
* KarmaHoudini: Most of the cast (even [[TheChewToy Cat]]) has gotten away with some particularly ruthless action at least once. Dog may be the most consistent example, having constantly gotten away with destroying aspects of his twin's life or getting him in trouble (though the fact most of the antagonists are cat-despising dogs that go lenient on Dog may have something to do with). Granted however a lot of the time, [[IdiotHoudini Dog is merely being stupid]] [[HanlonsRazor than actually callous]], [[JerkAssBall though not always]].
* {{Keet}}: Dog.
* KidsAreCruel: Back to School
* KillerRabbit: Let The Games Begin!
* LionsAndTigersAndHumansOhMy: The occasional human pops up in a few episodes.
* LivingToys: The Mean Bob action figures in "The Collector".
* LonelyRichKid: Shriek Dubois.
* MadeForTVMovie / TheMovie: ''[=CatDog=]: The Great Parent Mystery''.
* ManChild: Dog
** PsychopathicManChild: DependingOnTheWriter, but most of the time he isn't out to cause harm.
* MayContainEvil: Rancid Rabbit's yelling voice in CatDog Divided & Let The Games Begin.
* MeatOVision: Dog suffers this after going on a diet. See ColdTurkeysAreEverywhere.
* MinionWithAnFInEvil: Lube is part of the Greaser Gang who endlessly torment Catdog, but is also the noticeably stupider and more docile out of the three, having at least a few occasions he acts obliviously friendly or is just otherwise too ineffectual in his bullying.
** In "Lube in Love" he isn't even the villain. [=CatDog=] seem to be on a friendly relationship with him, letting him fix their car, and even help him try to meet someone who he's fallen in love with.
* MistakenForApocalypse: In "The End".
* {{Mix-and-Match Critter}}: [=CatDog=]
* MoleMiner: A gopher lives under [=CatDog's=] house, claiming ownership of anything underneath it.
* MouseHole: Winslow lives in one of these.
* MultipleHeadCase: [=CatDog=]. Subverted, as they're conjoined twins.
* TheNapoleon: Winslow and Eddie the Squirrel
* NightmareFuelStationAttendant: Rancid Rabbit
* NoCelebritiesWereHarmed: Randolph is a dead ringer for Cary Grant.
* NoHoldsBarredBeatdown: [=CatDog=] usually receives this from the Greasers. Cat mostly gets this when Dog is running, but many, many episodes imply or show that both of them are getting the crap beaten out of them.
* NoIndoorVoice: Rancid Rabbit, Shriek, and Eddie The Squirrel.
* OddCouple
* OneWingedAngel: Rancid of all characters pulls this off in "Sumo Enchanted Evening", when the now heavily overweight [=CatDog=] attempt to brush off Rancid's ridiculously high buffet bill, Rancid responds by ripping off his suit, revealing a girdle--which upon releasing causes him to expand to a positively massive sumo wrestler, and promptly duels them one on one.
* OnlySaneMan: Mervis & Dunglap
* PassingNotesInClass: When [=CatDog=] gets sent back to high school to get their diploma, Cat tries to pass a note to his teacher, whom he had a crush on when they went to high school together. She catches him and forces him to read the poem to everyone else, causing Cat to melt into a puddle. Dog, however, thinks the poem was beautiful.
* PecFlex: Dog does this in "Pumped."
* PingPongNaivete: Somehow Dog is smart enough to know the ethics against cheating and doing schoolwork but not to realize that dragging his conjoined twin across the street may cause slight physical harm.
** This is slightly less so when you realize that he is a ''dog.'' Dog is usually not in control of his instincts, and like most dogs, can't control themselves when they chase the garbage truck or the mailman.
* PlotAllergy: In "Sneezie Dog," Dog suddenly develops an allergy. They go to the doctor, who thinks that Dog may be allergic to Cat. Winslow decides to help Dog out, and takes the opportunity to torture Cat, as usual, up to shaving him bald and placing a brick wall between them. Eventually they find out Dog is actually allergic to Winslow, and they shave him bald as payback.
* PolarOppositeTwins: [=CatDog=].
* [[RealMenWearPink Real Greasers Take Ballet]]: Cat finds out Cliff takes ballet in one of the episodes. Toward the end, Cliff shows CatDog and the Greasers just how brutal ballet really is.
** That's not surprising. Many football players take up ballet to improve their balance, stamina, and flexibility.
* SadistShow: Yes, sometimes, heavily implied in the bad luck's Cat.
* SafetyWorst: "Safety Dog." Cat tries to make Dog safer by showing him a safety video. Dog is scared by the video and becomes so paranoid he encases himself in a bubble when he goes outside. Cat has to turn his brother back to normal after seeing what happened.
* SawStarWars27Times: In the episode "Spaced Out", Dog wanted to see ''Mean Bob in Space, Part 12'' for the 73rd time. Dunglap also wanted to see the movie for the 74th time in the same episode.
* SchoolYardBullyAllGrownUp: In "Fistful of Mail," it turns out the new mailman on [=CatDog's=] route is the paperboy who used to taunt Dog when he was a puppy.
* ScriptWank: An in-universe example where Cat teaches Dog not to eat meat as animals are friends. It's a buildup point for the related Aesop to be subverted.
* SeriousBusiness: What happens to people who break the rules at Rancid's pool? ''He puts them in his own prison and forces them to do manual labor''. On his pool.
* ShoutOut:
** In ''Full Moon Fever'', Cliff says, of Dog, "[[Film/{{Freaks}} Gobble gobble, one of us.]]"
** In another episode, Cat reads a "poem" that contains "Roses are red, violets are purple / Sugar is sweet and so is maple syruple", a line from Roger Miller's song "Dang Me".
** The episode ''Geekers'' is pretty much one giant one to ''Film/TheWarriors''.
** In the episode where Cat plays Abraham Lincoln in a community theatre musical, the lyric the nurse sings when Lincoln is born is "It's a boy Mrs. Lincoln...it's a boy!" Gee...[[{{Tommy}} sounds familiar...]]
** In the Halloween special, Dog has been turned into a vampire. When he's unconscious, he mutters the names of famous actors who've played vampires, including Creator/BelaLugosi, Klaus Kinski and Christopher Lee.
** "All About Cat" has a title and plot that parodies the film ''AllAboutEve''.
** In "Vexed of Kin," Cat and Dog's frog father crosses the street in a parody of ''VideoGame/{{Frogger}}'' which ends with their Sasquatch mother--rendered in similar graphics--following him across the street, causing a widespread series of car collisions and accidents due to her girth.
* SlapStick: A lot of it, usually directed towards Cat, but ''everybody'' on the show has gone through it at one point or another.
* SpoiledBrat: Shriek
* StatusQuoIsGod: It just doesn't get any better than this!
* StockNessMonster: Bessie the Lake Monster in ''The Great Parent Mystery''.
* SurroundedByIdiots: Cat
** [[UpToEleven And he's attached to one!]]
* SmallNameBigEgo: Cat.
* SmugSnake: A suitably reptillian one appears as a super-fast mailman, the first mailman that Dog is unable to defeat. [[spoiler:Dog eventually gives him what he deserves at the end]].
* TakeThat: Cliff's secret shame is that his real name is [[Literature/CliffordTheBigRedDog Clifford]].
* TemptingFate: "It just doesn't get any better than this!". Oh, it's about to get a ''lot'' worse.
* TerribleTrio: The Greaser Dogs
* TheToothHurts: When [=CatDog=] visits the dentist, they learn that whatever one does to his teeth affects the other's instead, as Cat has brushed his teeth all day which gave his brother perfect pearly whites. However, Dog ate mostly garbage which rotted out his brother's. This eventually escalates into a full-on battle, with each side trying to destroy the other's teeth.
* ThisLoserIsYou: Cat.
* ThoseTwoGuys: Mervis and Dunglap.
* ThrowTheDogABone: Happened a LOT more often than this page'd have you think. For example, in "Dog Ate It," Dog's eaten everything in the dance hall and made Cat's date break up with him (understandable, as Dog ate her sister)... but Randolph loved what they did so much he gives them the trophy for Best Dance!
* TimeTravelEpisode: "CatDog 3001," where they're sent into the future to save the people there from [[ItMakesSenseInContext Winslow's giant evil descendant]].
* TinyGuyHugeGirl: [[spoiler:Their parents.]]
* {{Tomboy}}: Shriek. The other two Greasers had to do a [[strike:DoubleTake]] QUADRUPLE TAKE when she finally confirmed she was a girl.
** Cat's occasionally hinted at, but unrequited, crush on Shriek is probably the only exception to the reactions everyone but her parents displayed at this revelation.
* {{Tsundere}}: Shriek
* TooDumbToLive: Dog, The Greasers, & Rancid Rabbit.
* ToiletHumor: Mostly happens in many terrifying moments.
* TotemPoleTrench: The Ingrid Twins
* TrappedInTVLand: "Spaced Out." After being dragged to Dog's favorite movie for the 70th or so time, Cat tries to stop the movie but gets sucked into it instead. Mean Bob, the star, gets destroyed and they have to take his place, managing to do a good job at it.
* TwoBeingsOneBody: [=CatDog=], of course.
* TheUnfavorite: Cat worries that he is this in "Vexed of Kin."
* UngratefulBastard: Cliff & Rancid Rabbit
* TheUnreveal: [[spoiler: ''The Great Parent Mystery''. What, were you expecting ''biological'' parents?]]
* UnstoppableRage: Happens when Cat snaps at a Monster Truck Rally.
** Could also qualify as a CrowningMomentOfAwesome, as Cat clobbers everyone who's screwed him over in past episodes, especially at the end when he destroys Cliff's Monster Truck with a single punch.
*** He also clobbered Mervis, Dunglap and Lola, all of whom were their friends.
** Dog in "Pumped".
* VillainProtagonist / TemporarilyAVillain: Cat.
* VocalEvolution: In the earliest episodes, Dog's voice is noticably deeper and rather nasally.
* WeaksauceWeakness: Several characters refer to this trope as "Porkfat", named after the weaksauce weakness of the in-universe movie character, Mean Bob.
* WentToTheGreatXInTheSky:
-->'''Shriek:''' You're going to that great big litter box in the sky!
-->'''Lube:''' ''(Looks up)'' [[ComicallyMissingThePoint Where?]]
* WhyDidItHaveToBeSnakes: Rancid Rabbit, Eddie The Squirrel & The Greaser Dogs in Rinky Dinks
** Cat, being a cat, hates water.
** A majority of dog characters (Dog, the Greaser Dogs, etc.) are terrified of ticks.
* WhyDoYouKeepChangingJobs: Rancid Rabbit
** According to one episode, he doesn't change jobs. He has all the jobs. All of them. In that episode, Rancid is a dog catcher and is trying to catch Dog. He then decides to use his mayoral powers to grant himself a search warrant.
* WorkingOnTheChainGang: Characters are seen breaking blocks of chlorine tabs for violating the rules at the public pool.
* [[YankTheDogsChain Yank The CatDog's Chain]]: And how! They create a successful candy, and everyone goes bald! They finally move their house to a beautiful lake, but Rancid drains it at the last minute! They think they beat a childhood rival to the top of the mountain, but it's revealed [[DarkHorseVictory a third party beat them both]]! If [[CatchPhrase it just doesn't get any better than this]], it ''won't''.
** Since Dog often plays TheFool and a frequent KarmaHoudini he is on occasion genuinely [[ThrowTheDogABone thrown a bone]] (usually at Cat's expense). That or he is [[ThePollyanna merely too blissfully inept to see the bad side of things]].
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