A "dim-witted dog" named Dudley Puppy is recruited by T.U.F.F. (Turbo Undercover Fighting Force) to protect his hometown of Petropolis with the aid of his partner, Kitty Katswell, against D.O.O.M. (Diabolical Order Of Mayhem).
- AcCENT Upon the Wrong SylLABle: A running gag in the episode which introduces the Chameleon is Dudley (and eventually, Kitty and the Chameleon himself) pronouncing his name as "Cham-e-LE-on."
- Accidental Hero: When Dudley first encounters D.O.O.M, he knocked out all the henchmen simply because he was trying to recover his chew toy. He was so good at this trope that it's the reason he was recruited to T.U.F.F
- Accidental Marriage: When Snaptrap and Chameleon go on a Wedding Smashers spree, Dudley and Kitty have to fake a wedding to catch them. After all is said is done, it is hinted that Keswick was actually certified and their marriage was real.
- Accidental Misnaming: Keswick corrects Snaptrap the first couple of times he says his name incorrectly, but quickly gives up. Keswick does it with his own name at the end of the episode, as well as Snaptrap's, with Snaptrap correcting him.
- Action Girl: Kitty Katswell.
- Adorkable: Keswick could count.
- Affectionate Parody:
- The series' theme song is based on the theme to the 1960s TV series Secret Agent.
- The theme song to T.U.F.F. and D.O.O.M. in "Share-a-Lair" used The Brady Bunch's theme tune but tweaked the lyrics and graphics to fit.
- A.I. Is a Crapshoot: R.I.T.A. in "Toast of T.U.F.F."
- Alliterative Name: Kitty Katswell and Peg Puppy.
- Dudley's original name was Dudley Dog.
- All Your Powers Combined: Dudley is a combination of every breed of dog in existence, giving him the skills of each one (i.e. the nose of a bloodhound, speed of a greyhound, strength of a boxer, etc.) He must have quite a family tree.
- He's also got a dash of billy goat, though Keswick isn't quite sure how to explain that.
- Ambiguously Jewish: Dudley and Kitty. Neither of them show any obvious Jewish traits, but their mothers do.
- Animal Gender Bender: The male Bird Brain has laid eggs for comedic effect, and so does Keswick.
- Annoying Laugh: Verminious Snaptrap
- Anvil on Head: Happens in "The Dog Who Cried Fish" and "Puppy Love".
- Also in the ep "Mission: Really Big Mission"
- Anti-Villain: Birdbrain's henchmen: The Owl and the Bat.
- Slush, Snowflake's twin brother in "Chilly Dog".
- Also Percival, Stink Bug's henchman.
- Armor-Piercing Slap: Dudley, while being in Kitty's body, does it to Jack in "Freaky Spy-Day".
- Arson, Murder, and Jaywalking: The camp in the episode "Snappy Campers" is surrounded by a nuclear reactor, a dynamite factory and an 88¢ store. Subverted in that the 88¢ store sells bombs for 88¢ each.
- Artificial Limb: The Chief has a bionic foot that makes him even cooler than he is already.
- Attention Deficit... Ooh, Shiny!: The Chameleon has a hard time focusing on his schemes over his stoma- OOH LADYBUG! *nom*
- Dudley during the beginning of the episode "Watch Dog".
- Kitty when in the train's cat car In "Guard Dog"
- Ash Face: In the episode "Frisky Business", after the Chameleon escaped, he comes back as a rocket to grab his hotdog, but in the process of landing and taking off, blasts Kitty with the flames and leaves her completely charred black and smoking.
- Happens to Kitty multiple times in "Doom-mates", when Dudley blasts her with a gun, and also when the Chameleon blows her up with a bomb multiple times.
- Aww, Look! They Really Do Love Each Other: Dudley and Kitty have several of these moments.
- Badass in Distress: Almost every mission leads to Dudley and/or Kitty getting caught or kidnapped by the villain. They usually manage to free themselves and turn the tables on the bad guys.
- Bad Bad Acting: From "Doom-Mates":
Kitty: Oh, no. My whiskers are still gone.
Dudley: Oh, no. Don't fall on the bomb detonator.
- Also from the scene with Dr. Apocalypse in "Super Duper Crime Busters".
- Bad News, Irrelevant News: From "Mall Rat":
Keswick: Chief, I've analyzed the blueprint of the mall. The bad news is, there's absolutely no way to stop the mall from hurtling toward the sun.
Chief: Hmm. What's the good news?
Keswick: The food court's open till nine.
- Bald Women: Kitty has lost her hair and fur several times to Gag Haircut situations. Fifi (the Chameleon in disguise) briefly had part of her head shaved by a vending machine haircut (in addition to her poodle fur).
- Barefoot Cartoon Animal: Verminious Snaptrap, the Chameleon, Chief the flea, Jack Rabbit, and several background characters.
- Bears Are Bad News: Leather Teddy.
- Beard of Evil: Dudley *and* Kitty each wear one in order to resemble their evil twins: Dr. Rabies and Madame Katastrophe.
- Berserk Button: Never pull Kitty's tail as the Chameleon learned the hard way in "Bark To The Future".
- Big Bad: Snaptrap, though other recurring villains not related to him have their own episodes as well.
- Big Ball of Violence: In "Doom-Mates", Dudley and Kitty make this up after a Wimp Fight for a few seconds.
- Big "NO!": Four times the charm in "Watch Dog".
- Kitty, when Dudley is sending her to the "Non Reserved Visitor Parking" floor to stop her from getting the last donut.
- In the same episode, Dudley has three times the reaction: one, when Kitty attempted to eat the last donut he races her for; two, when his attempt to use a time travel watch would lead to altering the timeline where Snaptrap rules, and three, when he comes back from the use of time travel to get ice cream wearing pants.
- Big "WHAT?!": In "Mom-A-Geddon", three times.
- Everyone's reaction of finding out Birdbrain's bracelet, which is under the possession of Dudley's mother Peg, is really a deadly laser toilet.
- Also, Peg reacts like this when she is not pleased of finding out Dudley's job as a secret agent (at first).
- Lastly, Everyone's reaction of her not planning to make Dudley quit his job.
- Black Sheep: "Diary of a Mad Cat" reveals Kitty has a criminal sister.
- Bread, Eggs, Breaded Eggs: Kitty tries to warn that Snaptrap's having reformed is probably a scam, and the citizens of Petropolis should not trust his kindness.
Kitty: They could be poisoned, or bombs, or...or poisonous bombs!
- Butterfly of Doom: Parodied. Dudley travels back in time two minutes in order to grab the last donut before Kitty gets it. This somehow causes Snaptrap to always have been the ruler of Petropolis and prevents the formation of T.U.F.F.
- Butt Monkey: Larry
- Pretty much all the main characters at some point.
- Calvin Ball: In "The Rat Pack", some of Dudley's clones play "Monkey In The Middle". Unfortunately, they don't know the rules.
- Captain Obvious: In "Cruisin' for a Bruisin'", after Snaptrap has accidentally eaten some blue cheese and blown up to the size of a blimp:
Ollie: Come to think of it, aren't you allergic to cheese?
- Carnivore Confusion: A world of talking animals, including cows and birds, has steak, fried chicken, and other meat as food.
- Lampshaded in "Happy Howl-O-Ween", where is mentioned that Dudley was forced to hire a lawyer because he ate a turkey in Thanksgiving.
- Though lampshaded and averted in one episode where Snaptrap is thinking of a plan to get back at the "Monotrail" workers who snubbed them. His Crocodile lackey suggests "Why don't we just eat them?" in which Snaptrap replies "That's just dark and disturbing"
- Dudley and Kitty once fell down the stairs into a basement filled with beartraps.
- One of Kitty's flashbacks to her childhood, in "Operation: Happy Birthday", shows her eating a talking mouse magician hired to perform at her birthday party, something that makes the other partygoers freak out.
- Catch Phrase:
- Dudley: "Hi-gee-gee!"
- Snaptrap: "It is I, Verminious Snaptrap!" and "I shall now plot my revenge!"
- Just like Snaptrap, Chameleon also has "it is I, The Chameleon!"
- A Cat Named Kitty: Kitty Katswell.
- Cats Are Superior: With Kitty Katswell, it should probably come as no surprise, as she is naturally the brains of the duo.
- To be totally fair, the bar isn't exactly set too high...
- Parodied in "The Curse of King Mutt"
(To Dudley): "Honestly, why can't you be more like a cat? Determined, and focused, and... (Spots a toy mouse) MOUSE!
" *Kitty proceeds to chase it*.
- Cartoon Creature: Word of God says, "[T.U.F.F.] always knows [Keswick] will have the answer, but they just don't know what kind of animal he is."
- Case in point, the webbed feet may lead one to believe him a platypus, but then there's the lack of duck bill or beaver tail...and the fact that he has gills. And that he laid an egg.
- Lampshaded earlier in the same episode:
Dudley: ...find a female dog or kangaroo or whatever it is you are.
Kitty: I thought he was a labradoodle.
(Keswick stuffs an object down his pants)
- Its revealed in a later episode that Keswick is actually part of his own species, also called Keswick. They have quite an unusual life cycle, including a 'platypus phase' where they shoot toxic quills when they hiccup.
- Cheated Angle: Dudley's ears.
- The Chew Toy: Kitty suffers Amusing Injuries in almost every episode. The same can be said for Snaptrap, who also has his own personal Chew Toy, Larry.
- City of Adventure: Petropolis
- Clap Your Hands If You Believe: Averted. Zippy in "Mom-a-geddon" tells Bird Brain that he can fly if he only believes. Brain Brain tries it and promptly falls to the ground.
- Cloning Blues: "The Rat Pack".
- Cloud Cuckoo Lander: The Chief. "Yay! I love it when we get to evacuate!" Also, whenever a huge disaster that would destroy the world or do something similarly bad is about to occur, a Running Gag is for him to say, "Oh No! that means that (rather minor and inconsequential side effect) will happen. His "Oh No!" Catch Phrase is also used to exaggerate the seriousness of minor incidents.
- Companion Cube: Vivian, Verminious Snaptrap's bar of soap in "Mall Rat".
- Cone of Shame: Dudley has to wear one so he won't scratch at the horrible red rash on his butt.
- Convection Schmonvection: Zigzagged with the volcano rides at Lava Land in "Disobedience School".
- Couch Gag: The outcome of Dudley's guitar riff in the opening.
- Crouching Moron, Hidden Badass: Dudley, definitely.
- Cute Kitten: Kitty as a kitten is just darn adorable.
- Da Chief
- Dangerously Genre Savvy: When Larry went solo and started his own evil organization (as well as change his name to Murray), the first thing he did to shock T.U.F.F was not tell them his plan.
- Darker and Edgier: "Toast of T.U.F.F" despite still having silly moments, was probably the first "quite serious" episode, compared to the overly goofy and silly episodes before it. With one of the rare (If not only) villains that was "truly evil, and not wacky in any sense" and the defeat of the regular villains were somewhat dark. Snaptrap being blasted in the face, pointblank range with a moon destroying laser, it never showed him recover, while usually he says something wacky, this time he just laid there. And The Chameleon being turned into a grub and trying to devour himself.
- Dartboard of Hate: In "Doom and Gloom", when Snaptrap is moping in his mom's house and Larry (Murray) is running loose Snaptrap takes out his aggression by throwing darts (and a wood axe) at pictures of him.
- Deadpan Snarker: Most of the characters, though Kitty and Keswick do it the most in any given episode.
- Disappeared Dad: Dudley's and Kitty's fathers.
- Disney Death: In "Toast of T.U.F.F.," Keswick was presumed zapped to oblivion when he tried to help defeat Rita in the climatic showdown. It was actually a holographic image of him, as he reappears at the end.
- Ditzy Genius: Dudley, who seems to be little more than a hyperactive Idiot Hero, has flashes of genuine cleverness and defeats villains through outsmarting them almost as often as he out-muscles them.
- Dodge the Bullet: Kitty's ex-partner Jack Rabbit is capable of this.
- A Dog And His Killer Robot: Dudley once made friends with a robot that Snaptrap attempted to use to destroy T.U.F.F.
- Dogs Are Dumb
- Doomy Dooms of Doom: D.O.O.M. of course.
- Dumb Blonde: Dudley's girlfriend Daisy from "Girlfriend or Foe".
- Dystopia: The Snaptrap-ruled alternate timeline created by Dudley's use of Time Travel in "Watch Dog".
- Eek, a Mouse!!: Word for word in "Share-a-Lair", from an elephant.
- Episode Title Card: As with Hartman's other works, this one has this, in the form of a case file portfolio.
- Enemy Mine: Dudley and Snaptrap has worked together a couple of times against other villains.
- Even Evil Has Standards: Verminious Snaptrap would never kill anybody on their birthday without letting them celebrate it first. "No one's THAT evil!"
- Everybody Laughs Ending/Every Episode Ending: Not quite a laugh, but everybody who appears in the last scene of an episode will smile and pose for the camera before it fades to black, even if the situation is highly dangerous for the heroes◊.
- Everything's Deader with Zombies: "Happy Howl-o-Ween".
- Everything's Even Worse with Sharks: Snaptrap's favorite form of torture (mostly Larry's) is a tank filled with sharks.
- Evil Duo: Villains in certain episodes.
- Snowflake and Slush (Chilly Dog)
- Dr. Rabies and Madame Catastrophe (The Doomies) who are also Dudley's and Kitty's evil twins
- Birdbrain and Zippy (Mom-a-Geddon)
- Quacky the Duck and The Sharing Moose in Lucky Duck.
- Evil Is Hammy: Is it ever!
- Evil Is Petty: In addition to doing things that qualify as evil, most of Snaptrap's actions seem to Poke the Poodle.
- Evil Twin: Dr. Rabies and Madame Catastrophe. Oddly, they have evil goatees that make them look like they're from an alternate dimension, but it's just a coincidence and they're actually Criminal Doppelgangers.
- In "A Tale of Two Kitties" it's revealed Kitty's criminal sister Katty is also her twin.
- Explosive Breeder: Keswick is said to multiply when he gets wet.
- Expository Theme Tune: Like The Fairly OddParents and Danny Phantom before it, the theme song is made to explain the premise of the show.
- Expy: The Chief is very similar to Principal Pixiefrog from My Gym Partner's A Monkey.
- Fallen Hero: Jack Rabbit.
- "Fantastic Voyage" Plot: Dudley and the Chief have this experience when they're swallowed by the Chameleon in "Internal Affairs".
- Female Feline, Male Mutt
- Food Slap: In "Freaky Spy-Day", Dudley (who is Kitty's body) does it to Jack. First, he spills water on him, then he puts ketchup and butter to his face.
- Four-Fingered Hands: This becomes especially obvious in this scene from "Purr-fect Partners":
Snaptrap: Ready to lose one of your nine lives?
: I'd rather use my ten claws
! (brandishing her claws, of which there are clearly only eight)
- Actually, that is an accurate fact about cats. They only have four 'fingers' on each paw, but also have a fifth claw further up their legs. So she would have ten claws and four fingers.
- Four-Legged Insect: Chief the flea.
- "Freaky Friday" Flip: The episode "Freaky Spy Day".
- Freudian Excuse: Verminious Snaptrap might qualify considering all the hints dropped on the show about his Mother being abusive, and how much he hates her.
- Also, the Chameleon, caused by being a social outcast.
- Fully Dressed Cartoon Animal: Kitty, Keswick, Peg Puppy.
- Fun T-Shirt: In "Mall Rat", Dudley wears a blue variation of his shirt with "I ♥" and the graphic of a muffin.
- Fun with Acronyms: T.U.F.F. (Turbo Undercover Fighting Force) and D.O.O.M. (Diabolical Order Of Mayhem). Further on, there is R.I.T.A. (Robotic Interative Toasting Appliance), G.L.O.O.M. (Genius Larry's Order Of Mayhem), F.L.O.P.P. (Fiendish League Of Potential Perpetrators), T.R.U.S.T. (T.U.F.F.'s Recreational Ultimate Survival Tool), etc.
- Funny Animal: Dudley is a walking, talking secret agent, but still harbors affection for chewing his own butt and chew toys. Also, Kitty has little to no balance when her whiskers are cut, as the popular (but incorrect) myth states about real cats.
- Fur Bikini: In "Hot Dog" Kitty makes herself one by shaving off all her fur except for one big patch in the shape of a one-piece. Dudley leaves a two-pieces bikini of fur after he shaved.
- Furry Confusion: In the very first episode we see Verminious Snaptrap, a large anthropomorphic rat, use a mystical Artifact of Doom known as the Kruger Rat to control the minds of all rats in the city. Feral rats.
- In Snap Dad, it reveals Snaptrap used to have a pet hamster.
- We've also seen an anthro-cow as a TUFF agent, and normal cows drawn to Snaptrap's lair with a giant magnet.
- Kitty used to leave dead mice at the Chief's door.
- Quacky the Duck is an anthropomorphic duck, but Bird Brain's henchman Duck looks like a common duck.
- Gadgeteer Genius: Keswick, by far. He's made a machine that makes donuts out of thin air and redesigned D.O.O.M.'s lair using soup cans and a shark tank.
- Gag Haircut: Dudley gave himself one in "Hot Dog".
- Kitty has lost her hair and fur several times in a few episodes. In "Hot Dog," she shaved off almost all of her fur (except her hair, tail, and torso) when Petropolis had turned into a hot desert. In "Big Dog on Campus," she (unknowingly) went undercover to Dudley's high school reunion as a girl who had lost all of her hair. Then half of her hair was blown off by a bomb in "Doom Mates." Also, her hair was burned off (though the rest of her was fine) in "Snappy Campers."
- Getting Crap Past the Radar: Counting Cougar's name.
- A mug owned by Keswick in "Carbon Copies" says "world's sexiest mathematician".
- In Mall Rats, at the beginning Dudley is looking at a computer monitor drooling and saying "Come to Daddy" It turns out he was on a "Meat Website" looking at pictures of steaks.
- Gilligan Cut: Happens in "Kid Stuff" when Dudley comes up with a plan to beat Snaptrap with Quacky the Duck's help.
Dudley: I'm president of his fan club. He can't say no to me.
(Cut to Dudley bruised and bandaged)
Keswick: I can't believe he said no to you.
Dudley: He didn't just say no. He had his bodyguards throw me down a flight of stairs!
Dudley: What's he gonna do? Put us in jail?
(cut to Dudley and Kitty in jail)
Dudley: Wow, he put us in jail.
- Giving Someone the Pointer Finger: "Or should I call you...THE CHAMELEON?!"
- Goggles Do Something Unusual: Subverted at the end of "Mind Trap"; Keswick makes a pair of goggles that allow the wearer to see people's underwear. Kitty promptly throws them down the garbage chute before anyone can use them.
- Got Volunteered: Dudley was chosen to go undercover in Snaptrap's School of Evil when Kitty and Keswick stepped backwards.
- Gravity Is a Harsh Mistress: In "Puppy Love", The Chameleon realizes that he can't stick to walls in the form of a French poodle. Only then does he fall off the side of the building that he has been stuck to for a while now.
- Green Eyes: Kitty.
- Grievous Harm with a Body: In "Doom-Mates", Dudley repeatedly uses Kitty as a club.
Kitty: Dudley! Stop hitting things with me!
- Gross-Up Close-Up: Dudley's butt rash in "Dog Dish", much to everyone's horror.
Chief: My eyes!
- Had the Silly Thing in Reverse: Or rather, forward, when Dudley attempted to back out to escape the Chameleon and ended up running over him.
- Half-Dressed Cartoon Animal: Dudley. He doesn't do pants. This is frequently lampshaded.
- Averted in Mom-A-Geddon where it's shown that Dudley wears underpants underneath pants that look like naked animal legs.
- Many other characters wear shirt but not pants: Larry, Francisco, Bird Brain, Bad Dog, etc.
- Hammerspace: Kitty pulls a cannon that's about ten times her size out from behind her back in "Mall Rat". Later in the same episode, she pulls out two pom-poms to perform a gloating dance after it turns out that she was right about Snaptrap being evil the entire time that he was pretending to have changed after his stay in prison.
- Hartman Hips: Kitty.
- The Hero: Dudley
- Hero with an F in Good: Snaptrap's temporary Heel-Face Turn in "Snap Dad" was foiled by the fact that he was a kleptomaniac Jerkass, as well as generally incompetent as a good guy.
- Hotblooded Sideburns: Kitty, quite prominently.
- Hollywood Tone-Deaf: Kitty
- Hypercompetent Sidekick: Ollie (and maybe Fransisco and Larry as well) to Snaptrap.
- I Can't Dance: Kitty is a terrible dancer, as shown in "The Rat Pack" and "Hush Puppy". Later gets lessons at Snaptrap's dance boutique in "Dancin' Machine".
- Identical Twin ID Tag: The one difference between between Kitty and her sister Katty, besides their clothes, is Katty has a Skunk Stripe in her hair.
- Idiot Ball: In "Agent of the Year" Dudley tricks Kitty into grabbing a rocket by pretending it's a phone.
- Idiot Hero: Take a guess.
- Informed Deformity: In "Diary of a Mad Cat" there's a Running Gag where people point out Kitty's "broad shoulders."
- Inventional Wisdom: What was a 'Flood the City' button doing on the city dam?
- For that matter, why was there an 'Unflood the City' button?
- Insistent Terminology: Inverted. Birdbrain is quite insistent that the team up between him, Snaptrap and the Chameleon is not called Team Evil.
- Insult Backfire: In "Diary of a Mad Cat".
Dudley: What's this next to my name?
Dudley: Does that mean handsome?
- Interspecies Romance: Snaptrap and Peggy Puppy (Dudley's mom) in "Snap Dad." It didn't last.
- I Want Grandkids: According to Kitty's diary her mother is pressuring her to get married.
- Jerkass Ball: Dudley and Kitty in "Agent of the Year" where they arrest innocent people just to win an award. It could be argued it's in character for Dudley, but it's definitely out of character for Kitty.
- Jewish Mother: Dudley's mother is a blatant one.
- Kitty's mother. She has a Jewish accent and is always pressuring Kitty to get married.
- Keet: Dudley. Dear Lord, Dudley.
- "King Kong" Climb: Bird Brain does this in "Barking Tall", knocking down T.U.F.F.'s airplanes, and later grabbing Kitty.
- Last of His Kind: Bird Brain, who uses this to his advantage to protect himself from TUFF. Until he violates this by creating a giant mutant Boobie, therefore no longer protected by the law for being the last one.
- Possibly Keswick, who is part of his own species. Part of their life cycle is growing a reptilian tail that breaks off and becomes another Keswick, who they must fight to the death.
- Left the Background Music On: In "Dog Daze", when Snaptrap was hypnotizing Dudley, eerie hypnotic music was playing in the background. In the end, it turned out to be being played by Larry, who Snaptrap told to knock it off as it was creeping him out.
- Legion of Doom: The Diabolical Order Of Mayhem
- LEGO Genetics: Dudly is a combination of every breed of dog ever, and somehow a bit of goat. But the all-time winner is Keswick, who has gills, webbed feet, lays eggs, has a pouch, and who knows what else.
- Partially justified with Dudley as a long enough blood line could mix every dog breed, the goat is something else.
- Lethal Chef: Lunch Lady Bug. Except to Dudley who loves her food.
- In "Mind Trap" Kitty bakes fish cookies that even she hates.
- Limited Wardrobe
- Line-of-Sight Name: In The Wrong Stuff, Dudley and Keswick try to hide their identity from Kitty by saying that their name is "Bob" and the name of a sign, such as "Men's Room" or "Don't Feed The Squirrels" or "Stay Off The Grass".
- Literal Metaphor:
Kitty: We've just been a little disorganized since we lost our secretary.
Chief: The secretary quit?!
Keswick: No, we literally lost her. She took a ten-minute break, stuff piled up, and we never saw her again.
Dudley: Whoa! Your dress is smoking!
The Chameleon, disguised as Fifi: Thank you.
Dudley: No, I mean it's really smoking!
- In "Snap Dad", Dudley's mother Peggy isn't too broken up over Snap Trap turning back to his evil ways, saying she saw the writing on the wall...because Snap Trap literally wrote it on the wall.
- In "The Rat Pack", when the Chief said that the reviews for a musical were terrible, Snaptrap replied that the critics didn't know anything....because he had their minds erased.
- Really, damn near half the jokes on the show is like this. Especially the episode featuring Jack Rabbit, where doing this is a running gag. He offers Kitty to go to "The Old Stumping Ground". Turns out there's a restaurant called that. Later, Snaptrap is eating sushi from three days ago... that is, from the restaurant called "Three Days Ago". It keeps going and going and going, and that's just in ONE episode.
- Love Redeems: Invoked and subverted in "Snap Dad" when Snaptrap agrees to go straight because he's fallen in love with Dudley's mom, and was actually sincere about it, trying his best to perform a Heel-Face Turn. He eventually breaks it off with her because of his inability to actually act good and the fact he still cares too much for his former D.O.O.M. teammates (except Larry) to turn on them.
- Mad Scientist: Bird Brain. Keswick is a heroic version of this, as he often invents things for the sake of inventing them, including dangerous things like an acid spraying waffle maker, which even he questions why he created.
- Magic Feather: Kitty gives Dudley a collar that is supposed to reduce fear. The collar is ordinary, however.
- Male Gaze: "Puppy Unplugged" starts with a close-up on Kitty's butt.
- Dudley and Kitty act more like pre-teen siblings rather than adult agents, one who lives in their own apartment. Even more so with Dudley, he still lives with mom, and joins in with the kids when Snaptrap uses the "no hitting or killing near kids" rule to his advantage, doing kid related stuff along with crimes.
- All the main characters seem to qualify when it comes to Quacky the Duck.
- Minion with an F in Evil: Percival in "Law and Odor". Because of his repeated incompetence, Stink Bug fired him when he pulls out a sign for his signal known as "Air Un-Conditioner". This would lead him to side with T.U.F.F. in the end.
- Mistaken for Dying: In "Dead or a Lie", Dudley lies to Kitty about eating cupcakes behind her back by saying that he was poisoned by the Chameleon, which makes Kitty try and make Dudley's "final hours" his happiest, and makes Chameleon popular with Snaptrap and Birdbrain. Eventually, Dudley tells Kitty the truth, and she's not pleased about it.
- My Name Is Inigo Montoya: Kitty does it in "Freaky Spy-Day" after switching brains with Snaptrap to stop Jack from giving out the information of every undercover T.U.F.F. agent.
Kitty: [in Snaptrap's body] No chance, Jack, cause I'm not really Snaptrap. I'm Kitty Katswell!
- My Name Is Not Durwood: There are times when a character doesn't get the other character's name right. Examples includes Peg mostly calling Kitty "Mitzi", and even Jack mostly calls Dudley different names like "Davey" and "Dumply".
- No Celebrities Were Harmed: Keswick is a straight up parody of Jerry Lewis, while The Chameleon is clearly based on Peter Lorre. Booby is a play on Jonathan Harris (of Lost in Space fame) in full Dr. Smith mode. Kitty's former partner Jack Rabbit is a lot like Sean Connery-era James Bond. Snaptrap's voice is an impersonation of Ed Wynn. The episodes "Top Dog" has The Mere Kat, who is a Paul Lynde impersonation.
- No Indoor Voice: Dudley Puppy
- Nobody Can Die: Usually played straight (it's a cartoon by Butch Hartman on Nickelodeon, for crying out loud), but rather surprisingly averted in the second episode. The Chameleon, seeking revenge on Kitty Katswell for capturing him, traps her in a small chamber with a bomb that can be detonated several times. He proceeds to blow her up 8 times, supposedly killing her repeatedly until she's only got one life left (since as a cat she has 9 to start with).
- Although the Chameleon survives several explosions from the same bomb, so its lethality is questionable. It was certainly shown as Kitty just getting more frazzled with each blast, rather than dying.
- Non Sequitur Causality: In "Watch Dog" Dudley uses a time travel watch to go back and beat Kitty to the last donut. This somehow changes the present so Snaptrap has taken over the world. And at the end, Dudley uses it again when he misses the ice cream truck and this somehow changes the present so he's wearing pants.
- Not Even Bothering with the Accent: The Chameleon, despite having the ability to transform into anyone, he (usually) still uses his normal voice, occasionally using phrases related to his disguise. For example, when he infiltrated T.U.F.F. by disguising himself as "Fifi Oui-Oui", a gorgeous French Poodle, he said "French" phrases like "Notre Dame", "Eiffel Tower" and "Jacques Cousteau".
- Not in Front of the Kid: TUFF Rule 857 states that agents can't fight bad guys around children. Unfortunately, when Snaptrap found out, he takes advantage of it by attracting kids to him, leaving Dudley and Kitty powerless to stop him from committing his crimes.
- Not Now, We're Too Busy Crying over You: After Keswick "sacrifices" himself to save everybody, Dudley, Kitty and the Chief are all crying in a huddle. Keswick appeared why they were still crying. Kitty then exclaims, "Not now Keswick, we're too busy crying over Keswick!"
- Off Model: The animators can't seem to decide whether Kitty's nose is circular or triangular.
- Take a look at the page image. Kitty looks really off.
- Oh Wait, This Is My Grocery List: When Dudley goes undercover to learn one of Snaptrap's plans, he finds this, and thinks it's in code.
- The One Who Wears Shoes: Kitty and Keswick.
- Only Sane Man: Arguably Kitty is the only one with any sense.
- Ollie would also be this for DOOM.
- Bird Brain when you compare him to Verminious Snaptrap and the Chameleon.
- Overly Long Tongue: The Chameleon, naturally.
- Pantsless Males, Fully-Dressed Females: Played straight with Dudley and Kitty. All other males are fully clothed.
- Panty Shot: Kitty's pink underwear in Snappy Campers: Here, Keswick said he had sewed Kitty and Dudley's name in their underwears. So, Dudley and Kitty pulled out their own underwear to confirm it.
- Paper-Thin Disguise: The Chameleon - not visually, because he can copy appearance perfectly, but in acting. He's an incredibly bad actor (except when he's not), and his idea of sounding convincingly anything is to litter his talking with random phrases related to the person he's impersonating (when he acts French he inserts French foods into his sentences for no reason, same with impersonating a general with military talk). Surprisingly, this never fails to fool anyone.
- Parental Bonus: The Affectionate Parody of The Brady Bunch in the episode "Share-a-Lair".
- Perky Female Minion: Zippy, Birdbrain's overly cheerful assistant.
- Petting Zoo People: Much of the cast to some extent, with Kitty and a handsome tomcat from "Forget Me Mutt" being the closest examples.
- Pluto Is Expendable: In "Lucky Duck", Chameleon threatened to blow up Pluto. Then at the end, he decided to blow up the sun.
- Pointy-Haired Boss: Verminious Snaptrap
- Poke the Poodle: This was F.L.O.P.P's shtick, at least until they threatened to unravel space and time.
- Pretend We're Dead: In a Halloween Episode, Dudley pretended to be a zombie to follow real ones towards the place where Snaptrap, Birdbrain and Chameleon were hiding all candy and all the toilet paper. He befriended two zombies who told him where the bad guys were hidden.
- Pun-Based Title: Most of the episodes' names are puns. Examples: Mom-A-Geddon, Chilly Dog, Forget Me Mutt, Law and Odor, Mutts and Bolts, and so on.
- Punny Name: Everyone in F.L.O.P.P. is named/based around a pun - the Escape-Goat (an incompetent escape artist), the Missing Lynx (who never shows up), the Bluffalo ([[Exactly What It Says on the Tin who bluffs a lot), etc. Their leader is The Meerkat, which doesn't seem like a pun until he reminds everyone that he is "no mere kat."
- Puppy-Dog Eyes: Dudley.
- The Chameleon disguised as Dudley uses these to get back into Kitty's apartment after being thrown out in "Doom-Mates".
- Puppy Non Grata: After ruining a Chinese parade in one episode, Dudley is never allowed back in Chinatown.
- Rapid-Fire Comedy: Well, it IS a Butch Hartman show.
- Reptiles Are Abhorrent: Francisco the crocodile of D.O.O.M. and The Chameleon.
- Retired Bad Ass: The Chief was once T.U.F.F.'s top agent and an amazing fighter. In one episode, he comes out of retirement to help Dudley deal with the Chameleon. While things don't work out well at first, Dudley manages to give him a pep talk and he shows he's still got it by beating up the Chameleon.
- Revenge: Chameleon's motivation almost always comes down to this in most of his appearances.
- Quacky the Duck also wants this after his show is canceled.
- Rodents of Unusual Size: Verminious Snaptrap.
- Romance Novels: The Chief secretly reads these.
- Running Gag: Snaptrap throwing Larry into the shark tank.
- Chameleon trying to wear glasses.
- Hell, there is at least one running gag per-episode! Some examples are Kitty putting people to sleep with her talk about proper health in 'Bored of Education' and Dudley ending every description of how bad the Stinkbug smells with "in Atlantic City!" in 'Law and Odor'.
- Scrabble Babble: Snaptrap plays "Schmoodled". When challenged, he zaps the appointment. "There, I schmoodled Larry."
- It became a Running Gag for the episode that whenever stuff blew up, they used "schmoodled"
- Screw This, I'm Outta Here!: Chameleon started dating Dudley's mother Peggy in "Snap Dad", but instantly broke it off and ran for it when he found out she had kids (though it may have been who her son was).
- Sesquipedalian Loquaciousness: Kitty is affected by this after her uncle gives her a word-a-day calendar.
- Serious Business: As seen in "Watch-Dog", getting the only chocolate donut in the breakroom is such for Dudley and Kitty.
- Everyone, everyone is obsessed with the Quacky the Duck show. The army even lets Dudley and Kitty walk out of an military base with a missile and a tank simply because Quacky asked for it. Even Kitty is just as into it as everyone else (the only reason she stops is because Quacky "fired" her favorite character).
- Shapeshifting: The Chameleon, but only because of his suit.
- Shout-Out: The Petropolis Aquarium has a giant fishbowl on the top of it, which resembles Cosmo and Wanda's fishbowl in T.U.F.F. Puppy's sister series, The Fairly OddParents.
- In "Mom-a-Geddon", Agent Nuts shoots his reflection in a mirror after shouting, "I know it was you, Fredo!"
- In "Share a Lair", Keswick is working on a not-so-giant version of The Iron Giant
- In "Dog Daze," Chief is wearing an apron that says "Top Chief." This apron's font is in the same style as the television show Top Chef, complete with a knife between the two words.
- In the first Chameleon episode, at one point he turns into an anthropomorphic Model T Ford from Cars.
- Snaptrap's cabin in "Back To Nature" has an hockey mask on the wall & the Necronomicon Ex-Mortis laying around.
- At the end of "Flower Power", when Keswick becomes muscular, he takes a sword and rides on the back of a tiger, like He-Man from the Masters of the Universe franchise.
- "Rat Trap" has Snaptrap and Dudley engage in scenes from Rocky, Raiders of the Lost Ark, and Star Wars.
- Sickeningly Sweethearts: "Vermie" and "Peggy-poo" in "Snap Dad." Dudley vomited at least once.
- Slapstick Knows No Gender: In full effect. Not only is Kitty the Chew Toy , but even Innocent Bystander women often suffer Amusing Injuries. At one point Dudley, having been tricked into believing she is the shape-shifting Chameleon, beats the living crap out the winner of the Miss Petropolis pageant, and even this is played for laughs, flattened a couple times throughout episodes, eaten by a killer whale in one episode, caught in explosions, complete with her showing up later in a bodycast.
- Smelly Skunk: One of D.O.O.M's members is a skunk, but so far no comment has been made of his smell.
- Species Surname: Dudley Puppy and Peg Puppy.
- Inverted and played straight with Kitty Katswell.
- Speech-Impaired Animal: Birdbrain's henchmen, an owl who only says "Who?" and a blind bat that only says "Where?".
- Speech Impediment: Keswick stutters, and Snaptrap has a lisp.
- Spoiler Opening: The Episode Title Card will always have a picture of the episode's main bad guy. Usually it's the last picture. This can be a bad thing with several episodes, such as "The Wrong Stuff" and "Toast of T.U.F.F".
- Spy Catsuit: Kitty's usual outfit. Bonus points since she's, y'know, a cat.
- Strange Minds Think Alike: Maybe "schmoodled" is a real word.
- Honestly, its one of the most used jokes in the show. The only real difference between the thought processes of T.U.F.F and D.O.O.M is that one thinks for good and the other thinks for evil.
- Suck E. Cheese's: Peet-za Possum's.
- Quacky the Duck also creates one in "Quacky Birthday" as a plan to destroy Dudley, and calls it "Quack E. Cheese's".
- Sure, Let's Go with That: In "Snap Dad", Snaptrap starts dating Dudley's mother and says they met at the laundromat.
Dudley's Mom: No grown man should be walking around with ketchup on his shirt.
Snaptrap: Yes...that's what it was, ketchup. Lots and lots of ketchup.
- Suspiciously Specific Denial: Many, many times. An example from "Puppy Love":
Kitty: Just between us, my partner, Dudley, has a crush on you.
The Chameleon, disguised as Fifi: (grimaces) Well, that doesn't creep me out at all.
- Sweet Polly Oliver: The episode "Chilly Dog," when Dudley dresses up as a girl to go with Kitty's boy. Boys fall in love with Dudley as a girl. Subverted in that they never actually figure out that Dudley is a male dog.
- Talking Animal
- Theme Tune Cameo: Heard at some point in "Pup Daddy", with disco music-style.
- The Power of Friendship: Dudley was able to convince Kyle R (really Kill-R) not to destroy T.U.F.F thanks to this.
- "The Reason You Suck" Speech: The Chameleon gives out on to Kitty while disguised as her mother in "Diary of a Mad Cat".
The Chameleon: Now, when are you going to get married? Why don't you ever call me on my birthday? Why can't you be more like your sister?
Kitty: My sister's in jail!
The Chameleon: Yes, but she used her one phone call to call me on my birthday!
Kitty: STOP COMPARING ME TO HER! I'M PRETTY, TOO!!
The Chameleon: Actually, your shoulders are a little large, and we all know why you always wear gloves.
- Time Skip: Played for Laughs in "Doom and Gloom" where D.O.O.M. gets arrested and released 3-5 years later.
- In a later episode, Dudley doesn't come to work for a year.
- Title Drop: In the episode "Toast of Tuff", Keswick referred to R.I.T.A as such.
- The end of the very first episode has Kitty refer to Dudley as this.
- Title Theme Tune:
"He's a T.U.F.F. Puppy, T.U.F.F. Puppy, he's a T.U.F.F. Puppy. [...] He's a T.U.F.F. Puppy, T.U.F.F. Puppy, he's a T.U.F.F. Puppy!"
- Toilet Humour: Dudley is a dog after all.
- Toilet Paper Trail: In "The Curse of King Mutt'', Snaptrap trails toilet paper, then trips and wraps himself in it, looking like a mummy. The Chameleon and Bird Brain think he wrapped himself in toilet paper to disguise himself as King Mutt's mummy and scare Dudley into finding King Mutt's bone for them, and Snaptrap nervously tells them they're right before telling them what really happened through Suspiciously Specific Denial.
- Too Dumb to Live: Dudley. He doesn't even know what a toaster does.
- Forget toaster. He's doesn't even know how a light switch works.
- Snaptrap is also a mild example, particularly in "Mission: Really Big Mission" where his get rich quick scheme for the episode will also destroy the entire planet. Even The Chameleon calls him out on his embarrassing case of Didn't Think This Through.
- Top-Heavy Guy: Dudley.
- Tricking The Shape Shifter: Dudley does this to the Chameleon by pretending to believe the Chameleon can't pose as a realistic mouse. Chameleon proves him wrong, but unfortunately, the elephant agent was in front of him.
- Tron Lines: The Chameleon's suit has these.
- True Companions: The ending of "Toast of T.U.F.F." showed this between the main protagonists. And it was ADORABLE.
- Keswick pretty much confirms this in "Snapnapped", calling T.U.F.F his family.
- "Snap Dad" hints that D.O.O.M. might be a very dysfunctional version of this (or, alternatively, only one from Snaptrap's point-of-view). Snaptrap even said that Francisco and Ollie were like family to him (though he had no problem blasting Larry).
- Uncomfortable Elevator Moment: Happens in "Dog Tired", when Dudley and company must take the T.U.F.F. elevator, they meet Ida Bromstein, whom Keskick tied and pushed into the elevator a while before. He remarks that's weird.
- In "TUFF Sell", this happens when Keswick is waiting for the T.U.F.F. elevator just after he resigned from working there.
- The Unfavourite: Kitty's mother wishes she was more like her sister, even though said sister is a criminal.
- Verbal Backpedaling: In "Puppy Love", right in front of The Chief and T.U.F.F.'s two best agents, no less:
The Chameleon, disguised as Fifi: I look forward to destroying you, I mean working with you!
- Verbal Tic: Keswick stutters a lot.
- Villains Out Shopping: When they were being interviewed by a cameraman, they tried to take down the Chameleon, thinking he's doing evil, when he is really shopping.
- Villain Team-Up: In "The Curse of King Mutt", Snaptrap, Chameleon, and Bird Brain work together to steal King Mutt's jewel-encrusted bone. Naturally, given their personalities, Hilarity Ensues.
- The Walls Are Closing In: In "Snapnapped", complete with Spikes of Doom. The ironic part is that it wasn't in a bad guy's trap, but happened in their own HQ!
- Welcome Episode: Unlike many of Hartman's works where the show's pilot takes place after the events of the Expository Theme Tune, the first episode of T.U.F.F Puppy explains how Dudley became a secret agent.
- Who's on First?: Bird Brain's two henchmen, an owl that only says "Hoo" & a blind bat that only says "Where", tend to cause this much to the booby's annoyance.
- Then he gets two more henchmen: a female sheep (or ewe) and a duck named Skip.
- Followed by Holey Cow.
Bird Brain: Remind me to hire a henchman named "Everyone Jump Into The Woodchipper"!
- Why We Can't Have Nice Things: Keswick says the trope name almost word-for-word where after Dudley's messing around with his cloning machine results in the Chief ordering to get rid of it.
- Wimp Fight: Dudley and Kitty's occasional fights with each other.
- Wire Dilemma: 'Quacky Duck', the Show Within a Show, aparently had an episode where he taught kids how to disarm a nuclear missile!
Cut the blue wire, not the brown
Or you'll blow up the whole darn town
Cut the red wire, make your mama proud
Or you'll end up in a mushroom cloud
- World of Funny Animals
- World of Ham: Name pretty much any evil character on this show (Snaptrap, Chameleon, Bird Brain) and they'll fall under Large Ham. Dudley himself also qualifies.
- Kitty even shows large ham tendencies in episodes like "Super Duper Crime Busters".
- Would Hit a Girl: Dudley doesn't have any problem hitting Kitty, even kicking her in the very same episode, also being seen giving her slaps, bites and, what could be, punches. She doesn't hesitate to do the same to him, though.
- The Chameleon, hurting Kitty too.
- Doom Agents
- The Sharing Moose, being seen hitting Kitty on the head with a metal pipe, and even smiling while doing that
- "YEAH!" Shot: Almost every episode ends with one of these,
possibly definitely parodically.
- You Dirty Rat: Verminous Snaptrap
- Younger Than They Look: Bird Brain, according to "A Doomed Christmas" is 23, though that doesn't stop everyone else from thinking otherwise.
- Your Size May Vary: The Chief
- In "Barking Tall", Kitty is almost as tall as a ship while giant Dudley and giant Bird Brain are fighting.
- Your Brain Won't Be Much of a Meal:In the Halloween Episode, Keswick reanimated some corpses to have zombies for the holiday. He said the zombies would be harmless as long as there were candies for them to eat. Otherwise they'd eat brains. When Keswick commented Dudley would be safe, Dudley proved the pointing by claiming he didn't understand it.