Absent Animal Companion: In the episode "Pet Feud", Professor Utonium creates the perfect pet named Beebo. Beebo is the main focus of the episode, and at the end of the story all inhabitants of Townsville get one, but they are never seen or even mentioned again afterwards.
Absurdly Long Limousine: This was a recurring element of the show. An enormous white limousine that is several windows long and takes a few seconds to cross the whole screen is always the Mayor's ride of choice in times of leisure. He rides in the back.
Each of the Powerpuff Girls' names starts with a B and contains a double consonant. The Professor even says he chose Buttercup's name for no reason other than having already given her sisters names that start with a B.
Temporary fourth Powerpuff Girls Bunny and Bullet also fit the naming scheme.
The Rowdyruff Boys (Brick, Boomer, and Butch) have names that start with B, but lack the double consonant.
From the episode "I See a Funny Cartoon in Your Future" a newspaper's headline reads "Powerpuffs Powerless to Pinch Pocket-Picking Pin-Pushing Predictor!"
Also, from the episode "Powerpuff Bluff":
Blossom: Put down that priceless porcelain poodle, you punk! Criminal: P-P-P-Powerpuffs? Blossom: Precisely!
If Blossom's vision of a world ruled by her involving women calling all the shots and men only being allowed to do housework in "The Powerpuff Girls Rule" is any indication, she forgot the moral of "Equal Fights" about how gender equality does not mean being sexist towards men.
Lampshaded in "Too Pooped to Puff", where the Mayor (and possibly everyone else in Townsville) learn to defeat the giant monster without the Powerpuff Girls' help, but end up forgetting the point of the episode while it's still airing.
Mayor: You taught us a valuable lesson today. Although I can't quite remember what that was...anyway, have fun cleaning up the mess.
Mojo Jojo. A diabolical, card-carrying, power-hungry supervillain, yet such a classy, suave, and friendly guy. He shows good manners, even to the humans that he hates so much, and even manages to make friendly conversations, with the Powerpuff Girls, when they're not fighting, and he also respects them as rivals. In fact, Mojo even once went babysitting the Powerpuff Girls, and cooked food for them.
As for HIM, it's Depending on the Writer. However, sometimes, he's a comedic villain, who only does stereotypical villainous things, and not an actually truly evil one.
Big Billy from the Gangrene Gang. He's got such a friendly nature and personality, unlike the other members of the gang who only pretend to be nice to achieve their goals. He also once befriended the Powerpuff Girls for saving him. He'll also try to cheer people up with toys.
ALL the villains were this in the end of "See Me, Feel Me, Gnomey", where they were getting along with the innocents, and singing with them about that everyone should get along.
Alphabetical Theme Naming: All three girls have names beginning with B and the Professor even says it's the reason behind Buttercup's name. This even extends to temporary members (Bunny, Bullet) as well as both sets of evil counterparts, the Rowdyruff Boys (Brick, Boomer, and Butch), the Powerpunk Girls (Berserk, Brat, and Brute) and the girls in the dream sequence where they were normal (Bertha, Beatrice and Betty).
Apathetic Citizens: The citizens of Townsville are so used to having the girls fighting giant monsters, that they simply ignore when one goes on a rampage. An entire episode focuses on a typical day in the life of Mojo Jojo, who does mundane tasks without anybody giving him a second thought.
One of Cartoon Network's Bumpers called "Born and Raised in Townsville" brings attention to this by following a "normal" Townsville citizen on his way to work as various bad things happen to him, with it ending with him telling his wife over the phone that nothing interesting happened to him.
In the episode, "Equal Fights", Femme Fatale avoids capture by the girls by claiming to be committing crimes in the name of women's rights. To counter this, Ms. Bellum and Ms. Keane gather several female Townsville residents to talk to the girls:
Bank Teller: Was Femme Fatale looking out for me when she stole from my bank?
Policewoman: Was she looking out for me when she broke my arm?
Teenager: Was she looking out for me when she stole my hairstyle? (everyone glares at her) Well, she did!
In "What's the Big Idea?", Mojo Jojo having finally disposed of the girls successfully goes on a shopping spree by robbing a bank, a jewelry shop and... a DVD store looking for Director's Cuts and Commentaries. Guess he's running out of ideas.
In the episode, "Impeach Fuzz", when the Girls and Ms. Bellum try to convince The Mayor to take back his rightful position, they tell him that Fuzzy won't let the Girls fight crimes, has turned his office into a literal example of a pigsty, is tarnishing the image of what it is to be the Mayor, and is wearing his hat. The Berserk Button section below makes it pretty clear which one of these is The Mayor's.
From the episode, "Just Desserts", when Mrs. Smith shows Mr. Smith the features of the Smith Family Mini-van:
Mrs. Smith: All terrain slash-proof white-wall tires, blinding 3000-watt headlights, five turbo jet engines for optimum speed, six liquid titanium rocket launchers, rotating laser cannon turret, and a spacious leather interior that comfortably seats a family of four.
In the episode, "Not So Awesome Blossom", one of Mojo Jojo's robots destroys the Museum of Fine Arts, the Opera House, and a 98¢ store.
In the episode, "I See a Funny Cartoon in Your Future", Madame Argentina goes to a voodoo shop and buys three voodoo dolls of the Powerpuff Girls, a box of pins, and a box of gumdrops.
Art Evolution: The show started using digital animation time and time again throughout the fourth season, before permanently switching late in the season with "Keen on Keane". The animation was a little rough for the first few digitally animated episodes but by the final season they got the hang of it.
In "Get Back, Jojo", while Mojo Jojo is traveling through time, the art becomes rough looking pencil sketches.
"Substitute Creature", as noted above.
The Lucky Captain Rabbit King Nuggets commercial in "Jewel of the Aisle" is drawn and animated in a fuller, more cartoony manner so it could realistically mimic the actual Trix Rabbit commercials at the time. Just before the commercial came on, the girls were watching Mech-Animals, an obvious parody of Beast Wars, and it was done in the same dated looking CGI as that show.
For the Powerpuff Girls Rule special the show switched Adobe Flash, allowing for a lot more quicker paced animation.
The 2014 special went full CGI, giving the show a rather unique paper-mache style look. Not only that, but gives the girls a massive re-design as well.
Artistic License Law: Even if it does kickstart the entire plot of "Schoolhouse Rocked", there is no way it would be at all legal or even remotely safe to let a group of teenagers share a classroom with kindergartners. This holds doubly true if said teenagers have criminal records like the Gangreen Gang.
As Herself: "The Powerpuff Girls' Best Rainy Day Adventure Ever" simply focuses on them playing in their room, pretending to be... The Powerpuff Girls. Subverted as they all switch roles and even drag the very annoyed professor into playing Bubbles. Watching them run around singing their own theme tune turns the adorable Up to Eleven.
Asian Cleaver Fever: Mojo Jojo does a hibachi-grill routine while cooking for the girls when he has to babysit them. He professes to be "the best chef in Townsville", yet despite amazing the girls with knife-based stunts, they hate his food.
Asskicking Equals Authority: So, the Mayor has lost the election, and Fuzzy is the new mayor? No problem! Win a wrestling match against him, and the mayor is mayor again! Why bother with impeachments or new elections? Who cares about what the people has voted?
Happens ridiculously often in Townsville. So much so, it's lampshaded at one point in "Super Zeroes", where the 50 foot monster of the week actually explains that there is an island right off the coast of Townsville where monsters live.
The girls become giants in the episode "What's the Big Idea" by one of Mojo Jojo's inventions and for the most part the plannote make the girls so big that they can't do anything, even talk or walk, without doing more damage to the city so Mojo can go on a crime spree scott free works like a charm. The Professor fixes it ("I think") and returns the girls to normal ("I think"). The ending shows that he fixed the problem by making Townsville and its residents massive.
Baby Talk: In the episode "The Boys Are Back In Town", the girls use this as a means of defeating the Rowdyruff Boys.
Badass Family: In the episode "Powerprof", Professor Utonium invents a suit that gives him superpowers so that he can help his daughters fight crime, but the girls convince him to retire from crime-fighting when he proves too embarrassing to work with due to using cheesy slang and giving away humiliating secrets. Not to say that he isn't helpful to the girls in general, as there were several occasions where he was the one who helped the girls save the day.
They're definitely this for having both the Powerpuffs and Mojo Jojo as a part of the family.
Badass Normal: Mojo Jojo brings down the Powerpuff Girls with Antidote X during their Slumber Party, and the Girls' classmates subdue him with a pillow fight.
Bad Future: In "Speed Demon", the girls end up flying 50 years into the future, where everyone in Townsville has become disheveled wrecks who hate the Powerpuff Girls and Him conquered the world.
A variation — in one episode, the Gangreen Gang occupies city hall while the Mayor's away and use his hotline to sic the Powerpuff Girls at Fuzzy Lumpkins, Mojo Jojo and HIM, who are all having days off. Although the Powerpuff Girls never catch on to the fact that the Mayor's an impostor, the villains quickly do, tracking down the Gangreen Gang and delivering a(n) (un)righteous smackdown onto them. The Narrator is forced to declare that "So, once again, the day is saved, thanks to... Mojo, Fuzzy and HIM...?"
In "Forced Kin", Mojo Jojo also defeats a giant overlord while the Girls couldn't.
Balance, Speed, Strength Trio: While the three have similar powers, the girls usually invoke this trope, with Blossom being the balance, Bubbles the speed and Buttercup the strength.
Balloon Belly: The girls and the Mayor after eating the whole candy jar in "Candy is Dandy".
Bat Signal: The Powerpuff signal, though the only time it was used was in one episode where the girls were too busy playing with their new friend to answer the hotline.
Bathtub Mermaid: In one episode, Bubbles brings a baby whale home, so they flood the basement and hide her there from the Professor, who had warned Bubbles about bringing animals into the house.
Batman Can Breathe in Space: Although they wore space suits in "Uh Oh Dynamo" and the beginning of "Helter Shelter", the girls are perfectly capable of breathing, talking and even hearing sounds from Earth while in space.
There was a variation of this trope in "The Boys are Back in Town." All three girls are squashed into a hockey puck and smacked around by the Rowdyruff Boys.
This trope also occurred in a "Got Milk" promo, when Buttercup throws Lil' Arturo into the rest of the Gangreen Gang like a bowling ball.
Be Yourself: In "Super Zeroes", Steve the Monster is quite put off at the girls not being their usual Action Girl selves, stating monsters value their whoopass skills.
Steve: Now this new bit is just not gonna cut it. (to Buttercup) Sure, you didn't have a thirst for vengeance... (to Bubbles) ...stickers with your face on them... (to Blossom) ...or souped-up vehicles — 'cause you didn't need 'em! See, even if you take away the costumes, props, and angst, you still have all the bravery and courage it takes to save the day.
Becoming the Mask: In one episode, a thief attempts to steal a cereal box from the girls that a priceless diamond managed to find its way into (long story) by dressing up as the cereal's mascot, the Lucky Captain Rabbit King. After many failed attempts, he breaks down, crying out "I ONLY WANTED SOME CEREAL!" The girls finally relent and give him the box and he immediately starts scarfing down the cereal, forgetting about the diamond inside. Three guesses what happens next...
"FUZZY! You can throw away my things, and I don't mind the hay on the floor, and the chicken wire's a nice touch, and I kinda like that beat-up old flivver. But no one, I mean no one, wears my mayorin' hat! Now give it back!"
Also, under any circumstances, do not come between the girls and their candy. Mojo learned this the hard way and was practically beaten to an inch of his life as a result.
Mojo Jojo does not like having his ideas stolen, as the alien invader in "Forced Kin" learned to his sorrow.
The entirety of "Bubblevicious" is dedicated to Bubbles going on a rampage after her button (being treated like a baby by everyone, even her own family) is pressed once too often. She calms down at the end, but then Mojo zaps her with a laser (again)
An easy way to tick off all three of the girls is to endanger the life of the Professor.
Fuzzy Lumpkins and "trespassers", a term he defines very broadly. For example: He shot at a leaf that happened to drift onto his lawn.
Also if you value your life, do NOT touch Fuzzy's things, even if it is for good intentions of returning it to him. Especially not his banjo.
Marianne Smith when anyone tries to disrupt the dinner she is hosting.
Beware the Superman: All of the girls have shown shocking signs of a possible future FaceHeel Turn. Buttercup is extremely violent and has got a taste for money and certain boys. Snake has already tried to exploit that flaw with big success. Blossom will do anything to please even if it crosses the line. Bubbles, as mentioned above can be even more violent if she will. The biggest concern is their affection for candy. Poor Mojo indeed.
Big Bad: Mojo Jojo is the most frequently appearing villain and most of his plans focus solely on defeating the Powerpuff Girls or at least making them unable to stop him. It helps that their origins are connected, as Mojo Jojo was mutated by the same explosion that created the girls.
Judge: You, Mojo Jojo, are hereby sentenced to teaching a knowledge extension course at Townsville Community College!
Mojo Jojo: NOOOOOOOOOOOOOOOOOOOOO! By which I mean I cannot do it.
"Fallen Arches": Captain Righteous and Lefty confront the Ministry of Pain. The Captain lets out a big no as he runs towards Lefty who just hurt his hip. However, he hasn't reached his sidekick yet so he shouts it again.
The comic book story "Steal A Meal" (Cartoon Network Block Party #26) has the girls doing a tearful Big "NO!" upon learning that after all the breakfast cereal in town had been stolen the only thing left was oatmeal.
"Mime For A Change": Bubbles performs a great Big "NO!"
For the good example in "Knock it Off": Dick Hardly does this when his own creations start killing him.
In "Los Dos Mojos", when Bubbles (who, thanks to amnesia, thinks she's Mojo Jojo) rants that she is the real Mojo Jojo, the real real Mojo shouts at her, "Oh, shut up!" before walloping her with an I-beam that caused her to lose her memory in the first place (only this time, she is cured).
Running Gag in "Monstra-City"; Buttercup yells "SHUT UP!" every time the people and the monsters start arguing.
Blatant Lies: In "Getting Twiggy With It", when cornered by the girls in his bedroom, Mitch Mitchellson weepingly cries that he's never had any pets. There is an enormous habitat with a giant snake right in easy view.
Bloodless Carnage: The girls suffer absolutely no fatal accidents whenever they get flattened by a giant rock (Fuzzy's rock in "Meet the Beat-Alls", Big Billy as a rock in "Power Lunch"), coming out completely unharmed later.
Brain Monster: Mojo Jojo has his enlarged brain protected by a transparent helmet.
Brick Joke: In "Candy is Dandy," the mayor offers to reward the girls by making them a statue or by declaring a Powerpuff Girls Day, to which they decline both. Guess what happens in the very next episode.
A lot of people seem to feel that they can push these walking titans without consequence; a couple of young, snarky residents of the Town Of Citysville seem to forget entirely that the only thing keeping them alive is the girls' sense of right and wrong—and they push Buttercup worst of all.
Dexter from Dexter's Laboratory makes several cameos over the course of the series, including the episode "Forced Kin". In addition, Mr. Koosalagoopagoop makes a cameo, and is mentioned, in "Imaginary Fiend" - apparently he's Bubbles' imaginary friend as well.
Wally Gator (albeit much larger) appears in "Knock It Off".
Done by Blossom in "Los Dos Mojos"; lampshaded by Mojo.
Blossom: I think Bubbles thinks she's Mojo Jojo! Mojo: (sarcastically) No. Really. You think?
Also in "Fuzzy Logic":
Blossom: What happened here? Bubbles: You know what? I bet it was something bad. The other girls look unimpressed by the deduction.
Cardboard Prison: Townsville's prison isn't too good at keeping Mojo Jojo and other villains locked up, particularly since they often appear out of jail even when they were incarcerated by the end of their previous appearance.
Chainsaw Good: In the episode "Stray Bullet", the first of a numerous weapons Mojo Jojo takes out to destroy the trapped Powerpuff Girls is a chainsaw, which scares them and they struggle to get free from his lair.
Chemistry Can Do Anything: Such as create super-powered little girls, using sugar, spice, and everything nice... And Chemical X.
The City vs. the Country: In "Town and Out", the Utonium family moves to the metropolis of Citiesville, only to realize that it can't compare to Townsville, their original home.
Class Pet: Twiggy the hamster. Mitch bullies Twiggy. In one episode, a liquid turns Twiggy into a monster.
Clip Show: Subverted and parodied partway through in that "The City of Clipsville" eventually shows flashbacks to events that never actually happened in any of the previous episodes (like the girls growing into teenagers and the Rowdyruff Boys asking them out) and has everyone barge into the girls' house to reminisce about rather insipid things like mowing the lawn.
Comic-Book Adaptation: DC Comics—70 regular issues, plus two issues of Cartoon Network Starring (their first two comic appearances), an adaptation of The Powerpuff Girls Movie, 21 appearances in Cartoon Network Block Party, 3 appearances of Cartoon Network Action Pack (Rowdyruff Boys stories—the boys appeared in four issues) and four volumes of reprinted stories. Series creator Craig McCracken drew and co-wrote the first CN Starring issue. IDW is now rebooting the comic in both new stories and reprints from DC.
Company Cross References: Dexter had background cameos in several episodes. In addition, "Imaginary Fiend" featured a cameo by Dee Dee's imaginary friend, Koosie.
In the episode "Abracadaver", wrecking balls are used to demolish an old magic theater, only for one of them to hit the old iron maiden that held the titular antagonist Al Lusion and set him free, causing the whole plot of the episode.
Defied in "The Mane Event", Bubbles removes the wrecking ball from a crane to use it as Epic Flail against the Evil Eye, only to have it blasted out of her hands.
Buttercup: Wow, where did you get that giant match? Blossom: Same place I got the giant jar, silly! Episode 2, Season 1, remember?
The Christmas special has the girls tell Princess it is obvious that she is naughty by listing things she did in previous episodes, like buying Townsville and making crime legal and manipulating their new friend Robin into shoplifting.
Contrived Clumsiness: When the girls had to accidentally add Chemical X to their own "perfect little girl" concoction.
Blossom: Oh, look at what I found, girls: Chemical X. Bubbles: Be careful with that Chemical X. Buttercup: Yes, Blossom. Whatever you do, do not drop that Chemical X. Blossom: Don't worry, I wo— (tosses Chemical X into bowl) Whoops. I accidentally dropped the Chemical X, and it fell into the concoction. Girls: Oh, no.
Cowboy Episode: One episode, titled "West in Pieces", is basically a normal episode of the show, but in the Old West. The episode focuses on the Steamypuff Girls dealing with Mojo the Kid.
Coy, Girlish Flirt Pose: The Powerpuff Girls do this to disarm the Rowdyruff Boys so they can destroy them by kissing them.
Townsville itself wasn't a very good place before the girls were born, filled with crime and the citizens had basically lost all hope.
The setting of "Speed Demon".
Create Your Own Hero: It's eventually revealed that Mojo Jojo was once Professor Utonium's lab partner and caused the Chemical X to be added to the formula the girls were made from. Realising this causes Jojo to suffer a Villainous Breakdown. In another episode it gets even worse for him when he tries going back in time to Ret-Gone the girls and ends up giving Utonium the idea to create them in the first place.
In "Stuck Up, Up and Away" when Princess defeats two of the Powerpuff Girls effortlessly with her new armored supersuit, she expects to deal with Blossom just as easy. Cue Blossom hitting Princess back so hard multiple times she literally breaks the armor apart.
In "Meet the Beat-Alls" after Mojo, Him, Princess and Fuzzy form a Legion of Doom and start committing crimes everywhere, whenever the girls show up to stop them they would easily defeat them by zapping them with three lasers followed by crushing them with a rock (although they come out completely undamaged moments later), eventually causing them to abandon their crime-fighting completely. The moment Mojo leaves the group however, the tables are turned.
Cute Kittens: In the episode "Catastrophe", in which the Powerpuff Girls have to find one of the kittens for a giant monster in order to help him leave Townsville alone.
Dark Reprise: A more sinister version of the theme song's origin exposition music plays when Utonium's college roommate Professor Dick creates imitations of the Powerpuff Girls.
Buttercup's new identity "Super Zeroes". It's a parody of Spawn that can't step out into sunlight and has "scabs that never heal".
"Speed Demon" has HIM go from joke villain to Not-So-Harmless Villain, totaling the Earth, turning everyone into shell-shocked, psychotic zombies, and psychologically torturing the girls. Yikes.
Dark Is Not Evil: Mr. Green. Despite looking like a mish-mash of almost every Obviously Evil trope out there, he's really just a nice guy who wants to teach children. He even gives the girls a lecture about the trope.
A Day in the Limelight: Some episodes aren't particularly centered around the Girls themselves, but more around the quirky side-characters or villains, sometimes pushing the Girls to the sideline. "Custody Battle" in particular doesn't feature the Girls at all, just focusing on HIM and Mojo's attempts to take custody over the Rowdyruff Boys.
Decoy Protagonist: In "Knock It Off," the Girls acts as the main characters as usual for the show in the episode, however, after the Big Bad of the episode, Dick Hardly, turns into a One-Winged Angel and tries to kill them to harvest their Chemical X, the Professor arrives and saves them with The Power of Love, while Dick is killed by his own creations. In a way, the Professor is the real protagonist of said episode, as Dick Hardly was his so-called good roommate from college and the episode follows the Professor's realization that his college friend was Evil All Along from the beginning when Dick announces in front of the Professor to exploit the Girls for profit to the climax when the Professor catches him trying to kill the Girls and comes to their rescue with the help of Dick's defective creations.
Department of Redundancy Department: Mojo Jojo. That is to say, he speaks in a manner that is highly repetitive and frequently says things that he has already said at an earlier point in time and is now redundantly saying again, thus causing the audience to wonder if they are hearing the same thing multiple times, for they are hearing dialogue that they have already been exposed to, for he has already said it. He does go the extra mile to deny it:
Mojo Jojo[after hearing Bubbles speak like him]: I do not talk like that! The way I communicate is much different! I do not reiterate, repeat, reinstate the same thing over and over again! I am clear, concise, to the point!
Designated Girl Fight: Normally averted given the nature of the show, but Ms. Bellum and Sedusa's fight in "Something's A Ms." has shades of it. However, aside from their outfits, it avoids being a typical catfight. The two of them get pretty damn brutal.
Destructive Saviour: Whenever the girls go "save the day," their fights with the bad guys and monsters often end up leveling quite a few buildings in Townsville. Taken Up to Eleven in the debut episode of the Dynamo Humongous Mecha; they caused such a great deal of damage to the city in the process of stopping the monster that the Mayor and the rest of the citizens ordered them never to use the Dynamo again.
Diabolus ex Nihilo: "Nano of the North" has exactly zero context for anything that is happening. A cloud showed up over Townsville and everything inorganic is getting decimated by the rain, which is actually a vast army of miniature robots traveling within the raindrops that can destroy things at a molecular level. None of this is ever explained.
Didn't See That Coming: In the episode "Sweet n Sour", three cute animals - a puppy, kitten, and rabbit - are brainwashing the whole city of Townsville, except for the girls, of course, with their obviously cute faces, thus also causing a backlash on the girls due to their doubts on the animals. However, when they walk into a building which they think is a bank, they find it's a school filled with children who love the animals to near-death, thus delivering the message of how too much of something isn't always good. Of course, after the children leave, it is revealed that their receiving too much love was set up by the girls.
In the episode "Bought and Scold", Princess Morbucks takes over as Mayor of Townsville and passes a law legalizing crime, just so she could put the girls out of business. However, she apparently didn't realize that with crime being legal, she herself could be robbed as well, which is obviously one of the reasons why the girls thought of the idea of robbing her blind.
Mojo Jojo's first attack involved turning the world and the girls into dogs. He was beaten when Buttercup ran up the platform bit him in the behind. In another episode, he does almost the same thing, then he plays a video recording of the first event to the girls and explains that he won't turn them into dogs this time, and he installed butt armor to prevent getting bitten again. Mojo got so wrapped up on how he was beaten previously he forgot to disable or weaken the girls this time and they beat him up as usual. In fact, this is actually Mojo's signature flaw when it comes to planning all of his schemes. To a point where the girls would even rule him out of a robbery since it was too well thought-out.
Disappointed by the Motive: In "Just Desserts", a follow-up to the episode, "Supper Villain", Mrs. Smith and her children join her husband in helping him eliminate the Powerpuff Girls, following his release from prison. After the girls defeat them in a showdown, Mrs. Smith explains that her motive for wanting to destroy the girls was not really because they drove her husband insane or sent him to prison, but because they ruined her dinner. As the girls point out, that's not a good reason for wanting revenge on them at all.
Also used in issue #2 of the comic book ("Buttercup's Boyfriend"). HIM gives a boy a belt that sends out a beam that makes whoever it hits hate everyone. It hits Bubbles, but because she's filled with so much love, it short circuits her and knocks her unconscious. Blossom and (reluctantly) Buttercup verbally announce their love for Bubbles to revive her.
Roach Coach falls out of a building. While the Girls were shocked because they believed he was a man and they thought they'd killed him, but it turns out he was actually a cockroach in a mechanical suit, so he survived and was captured.
HIM sent plummeting into a bottomless abyss by Buttercup in "Power Noia". Being a recurring villain who can survive As Long as There is Evil, this doesn't kill him, but it defeats him for the time being.
During the episode where Mojo is hired to babysit the girls, the girls take a level in jerkass and beat him first with pillows, then just regularly beating him, for telling a bad bedtime story. The bad bedtime story came last, though, and it was because Mojo gave up his original plan in exasperation: first, Mojo had been planning to use his authority as babysitter to make the girls help him take over Townsville. One presumes the girls were beating him for his failed villainous plan, not for the bedtime story.
Combined with Minor Injury Overreaction, the two-parter episode about a meek husband trying to be a villain and horribly failed for it... the wife was MAD and ANGRY at the Powerpuff Girls and resort to crime along with the whole family because the Powerpuff Girls ruined her dinner to protect Professor Utonium.
The way Blossom and Bubbles get Buttercup to learn her lesson in "Moral Decay" probably also counts. See Do with Him as You Will for details.
Distracted by the Sexy: Large zig-zag: in the debut episode of the Rowdyruff Boys, the seemingly defeated girls get some advice from Ms. Bellum in turning the tide. The girls completely disarm the boys with long, come-hither eyelashes, then they make the boys explode by kissing them.
Divergent Character Evolution: In the original "Whoopass Stew" short and the two What a Cartoon! pilots, the Powerpuff Girls lacked distinctive personalities. The series made them more distinguishable by making Blossom the brainy leader, Bubbles the cute and innocent one, and Buttercup the tough and aggressive tomboy.
Do with Him as You Will: In "Moral Decay," Buttercup has amassed a tidy fortune from the tooth fairy for teeth she has accumulated from punching the teeth out of all the robbers. When she attacks the show's main villains unprovoked, Blossom somehow gets wind of it and she and Bubbles help the villains set up an ambush on Buttercup to teach her a lesson.
Buttercup: Uh, guys? A little help here?
Blossom: Sorry, Buttercup. You know what they say. "An eye for an eye..."
"Twisted Sister" ends with Bunny exploding after she rescues the girls.
"A Very Special Blossom" ends with Blossom being sentenced to 200 hours of community service.
"Down Here!" Shot: The episode "I See a Funny Cartoon in Your Future" has the villainous medium Madame Argentina being introduced with the camera first missing her because she's too short.
Drench Celebration: Mojo Jojo gets Gatorade thrown on him in the special Dance Pantsed after his softball team wins a game. He is then sent off to jail.
Dressed Like a Dominatrix: Sedusa is a villainess who can use her prehensile hair as whips. She wears a red leotard, black leggings with red fishnets, red thigh-high high-heeled boots, and red opera gloves.
Drugs Are Bad: "Mojo Jonesin'" plays this straight, but with Chemical X as an obvious metaphor for drugs. "Just Say No" is even spoken twice, once by the narrator and once by Blossom.
Drunk with Power: That episode where The Mayor got tired of relying on The Girls and decided to bring his own brand of justice, riding a balloon and stopping bad guys with an extending boxing glove. It goes to his head...
Election Day Episode: Mayor began campaigning for re-election, though Ms. Bellum said he was wasting his time since nobody was running against him... that is, until Fuzzy Lumpkins gets elected simply by yelling, "Shut up!" at Mayor for repeatedly proclaiming, "Vote for Mayor for mayor! Vote for Mayor for mayor!" and it catches on to the citizens of Townsville. After Fuzzy literally turns the mayoral office into a pig stye, Ms. Bellum and the Powerpuff Girls work to help the disgraced Mayor get his job back.
Elephants Are Scared of Mice: Taken to ridiculous lengths in an episode where a rivaling villain reanimates a mammoth (which appears as comically large as any city-destroying monster) to cause destruction in Townsville. To stop it, Mojo Jojo instructs the girls to leave a large hunk of cheese to attract the town's mice and scare the mammoth off. It works.
Emergency Taxi: In the episode "Him Diddle Riddle", one of the challenges is to defeat a large monster without superpowers. The girls do this by tripping the monster over, Buttercup calling a taxi which shows up just in time for the monster to land on it, and having the taxi drive the monster away.
Enemy Mime: Rainbow The Clown's alternate personality in "Mime for a Change".
Enemy Mine: The girls have occasionally teamed up with their enemies, such as in "Forced Kin", where they teamed up with Mojo Jojo to defeat the giant alien, and "Aspirations", where the Gangreen Gang sided with them against Sedusa.
Whenever a hero other than the Powerpuff Girls are the focus, they're the ones who saved the day, although in the Daylight Savings episode, the Narrator says the day was saved thanks to Benjamin Franklin's suggestion of setting clocks back during the winter for extra daylight to conserve economic spending on candles... and the Powerpuff Girls.
When the day didn't actually need saving: "And so... uh... hmm..."
When the girls get fed up with the people of Townsville's sheep attitude and force them to destroy a monster without the girls' help: "... the day is saved with no thanks to the Powerpuff Girls. Hey, I did it all by myself!"
When the episode centered around a couple of elderly heroes who were out to fight their out-of-retirement, equally elderly foes, and Blossom refused to allow the girls to intervene. The episode ends with all the old men falling over and breaking various limbs. Instead of the narrator, an in-story newscaster says over the end card "In this reporter's opinion, all this could have been averted if the Powerpuff Girls have just saved the day."
When Mojo Jojo and HIM get into an Eviler Than Thou contest to decide who is a better father for the Rowdyruff Boys: "The day is doomed, thanks to the Rowdyruff Boys." It also changes the usual pink-and-hot pink heart background for a black-and-white crossbones and skull one.
Many comic book stories end with the standard hearts-and-stars with the girls posing in front, but like in the show, it can be averted and subverted once in awhile. Among them was "Monkey Business" (issue #67), where Mojo's attempt to go straight and open his own restaurant keeps getting sabotaged by the girls, skeptical of his intentions. The last straw was when Blossom mistakes everybody farting (from Mojo's chili) as a gas leak, causing a frantic evacuation. Frustrated, Mojo goes back to crime, and it ends with the narrator chiding the girls in the hearts/stars panel for making Mojo evil again.
Narrator: So, once again, the day...is saved! Thanks to... (Mojo, Fuzzy, and Him appear on screen while the music skips and slows down) ...Mojo...Fuzzy...and Him...?
In the episode where Mojo kidnaps the Narrator; he does the usual bit...then asks them for a ride home.
"I See A Funny Cartoon In Your Future": The day is saved, thanks to the Powerpuff grill.
"That's Not My Baby": The diaper is changed... Hold the chili.
Everyone Has Standards: In the episode "Curses", the Powerpuff Girls fight a giant monster that is both figuratively and literally a potty-mouth (as in, he has a toilet for a head and his dialogue consists mostly of swearing). While the monster's swearing is depicted as grumbling gibberish, everyone who hears him is offended, even people you wouldn't expect to have a problem with cursing, like a pair of bikers and a convict.
HIM alternates between a syrupy-sweet falsetto and a gargles-with-gravel basso.
The Boogie Man plays this more straight.
Subverted in both aspects with Mr. Green from the episode "Substitute Creature". The "deep" part is subverted when it turns out that Mr. Green was struggling with a cold, and he talks in a normal voice after this is revealed. The "evil" part is subverted because it turns out that despite his appearance, Mr. Green was actually a good guy all along.
Mojo Jojo and HIM attempt to show themselves who is the better father of the Rowdyruff Boys in "Custody Battle".
"Forced Kin" had Mojo Jojo going up against an Alien Force, who not only performed acts of villainy that Mojo initially planned and wanted to do, but even counteracting Mojo and the girls attempts at counteracting those plans, to the point of breaking Mojo Jojo completely.
Exact Words: In the episode, "Him Diddle Riddle," Him tells the girls that if they cannot solve all of his riddles within the allotted time, "the Professor will pay." They fail, but it is revealed that the Professor just has to "pay" for breakfast at Him's diner. He'd have gotten a free meal if they'd have succeeded.
Exploiting the Fourth Wall: In one episode Mojo Jojo kidnapped the Narrator so that he could narrate the episode instead, his narration forcing the Powerpuff Girls to do everything he described them doing.
The episode "Jewel of the Aisle" features a breakfast cereal mascot known as Lucky Captain Rabbit King, who is a pastiche of Captain Crunch, Lucky Charms' Lucky the Leprechaun, the Trix Rabbit, and the rather obscure King Vitaman all rolled into one.
When the invading alien from "Forced Kin" finally reveals himself, he's very obviously intended to be a monochrome Galactus.
Eye Beams: Hilariously in one episode, a very thick pair of glasses upgrades Bubbles' to Wave-Motion Gun levels of power.
F--: In the episode "Mo' Linguish", Mojo Jojo mentions that if he had control of the grading system, he would make the lowest grade a "Z" rather than an "F".
The Faceless: Ms. Sara Bellum always has her face off-camera or hidden by either an object placed in front of her or her own hair. However, her face can be seen for a split-second in the 2009 special The Powerpuff Girls Rule.
Failed a Spot Check: The Girls failed to notice a tank following them in "The Powerpuff Girls Rule".
Fake Ultimate Hero: Major Man makes himself come off as being a better crime-fighter than the Powerpuff Girls because he appears to solve crimes as swiftly as they appear. It turns out that he was actually staging the crimes themselves and was only being a superhero for the glory.
And in the earlier seasons, they weren't silly at all. The guns were almost always colored gunmetal gray or brown.
Family Theme Naming: Blossom, Bubbles, and Buttercup all have cutesy names that start with B and contain a double consonant. When they create a temporary fourth Powerpuff girl, she also fits the pattern, being named Bunny.
Film Felons: One episode had a con man pretending to make a movie about the Powerpuff Girls as a scam to rob Townsville blind.
Fingerless Hands: The former Trope Namer. Lampshaded in "Criss Cross Crisis" when Buttercup switches bodies with Professor Utonium. When she tries to pick up the phone, she can't figure out how his fingers are supposed to work.
Cute bricks, to be sure, but the girls' basic powerset is this.
The Rowdyruff Boys possess the same basic powerset, and Blossom's male counterpart there is named Brick.
Food-Based Superpowers: The aptly named "Power Lunch" has the Gangrene Gang inadvertently gain superpowers when the girls zap them with heat vision after they had raid a convenience store, giving them the properties of what they eat. Ace gets ice due to eating ice cream, Snake stretching power from eating taffy, Arturo super speed due to drinking coffee, Grubber belching power from drinking soda and Billy a rock due to eating rock candy. However, it only lasts until they get a collective stomachache and have to use the toilet. As they had -ahem- "emptied" the contents of their stomachs, they likewise lost the powers.
Forgot Flanders Could Do That: The Mayor of Townsville started out as a kindly man who was slightly dim-witted, but he eventually devolved into being an unbearably moronic manchild. This was rectified in the 2014 special Dance Pantsed. The Mayor encourages Professor Utonium not to give up on his girls when Mojo Jojo takes control of them and also expresses remorse for snapping at Ms. Bellum for not believing her when she told him about a giant robot attacking Townsville, even apologizing to her near the end.
Four Eyes, Zero Soul: Lenny Baxter and Dick Hardly both wear glasses and have zero redeeming qualities.
Freak Lab Accident: Hilariously lampshaded} when, in an attempt to create a fourth Powerpuff Girl, the sisters re-create the circumstances of their origin by elaborately pretending that they're adding the Chemical X to the pot by sheer accident, complete with awkward dialogue delivery.
In the episode "Cootie Gras" our kindergartner heroines are terrified of a boy said to have Cooties. A fact Mojo Jojo uses to keep them at bay until they get over it. Once they do, however, they leave the boy Covered in Kisses, then go kick Mojo's butt.
Also, used in the first episode featuring the Rowdyruff Boys — the girls' key to defeat them is to look prettily at them and actually kiss them. It worked so well the guys explode in horror. Lampshaded right after this, when Bubbles and Blossom think kissing isn't that bad, but Buttercup is shown coughing and almost throwing up in disgust.
Given Name Reveal: Averted in "Get Back Jojo" (the episode where Mojo Jojo travels back in time to Professor Utonium's childhood), where Professor Utonium's teacher always calls him "Mr. Utonium".
Bubbles: *being zapped by a laser at a low level* I'm not... gonna... cry... you... dumb... doo-doo-brain! Mojo Jojo: "Doo-doo-brain"? That's it! I've had it with your sassy mouth!
Go-to-Sleep Ending: Happens at the end of two episodes, although at both times it is technically morning and they should really be starting the day. The first was "Boogie Frights" and the second was "Dream Scheme".
Grand Finale: The 10th anniversary special "The Powerpuff Girls Rule" served as a finale for the series, though another special entitled "Dance Pantsed" aired in 2014.
Great Gazoo: Issue #65 of the comic introduced the Micro-Puffs, tiny sprite versions of the girls from another dimension who show up to merely yank the girls' chains. One story has Blossom actually getting help from Mojo Jojo in defeating them. Considered canon in that all Micro-Puffs stories were written by Amy Rogers, head writer for the show.
Groin Attack: Easy to miss, but in the episode "The Rowdyruff Boys" Buttercup delivers multiple rapidfire punches to Brick's groin when they first meet. While not many people would be saying "Poor Brick" to this, it was probably overkill: 
Grossout Fakeout: In "Pee Pee G's", the girls think that one of them is wetting the bed, but it turns out that Mojo Jojo poured water in their bed as a prank. Then, he laughs and appears to wet himself, but he claims he broke his water bottle. He did sound as though he was lying, though.
Gross-Up Close-Up: Many times, but most commonly Mojo Jojo plopping to the ground, beaten to a pulp with breaks in his helmet exposing his oversized brain, missing teeth, black eyes and obviouly broken fingers.
"Sun Scream" has this quite a bit, most notably when Blossom attempts to get out of the bed all sunburned, and when their sunburned skin peels off in a very graphic manner.
Half-Witted Hillbilly: Fuzzy Lumpkins is a hillbilly, and no one can accuse him of being the brains of any operation.
Hard Truth Aesop: In a society where children are told to cooperate, we have the episode "Monstra-City". An episode that shows the complications of immigration/integration. In the end the only thing they learned was that not everyone is able to live together.
Hartman Hips: Nearly every female in the series. Most notably: Miss Bellum, Miss Keane (especially in "Keen on Keane"), Sedusa, Femme Fatale.
Hate Sink: Stan and Sandra Practice from "Girls Gone Mild" are not remotely likeable and are obvious strawmen, but their Smug Snake attitude when they threaten to sue the Professor is what clinches it.
Hates Baths: Buttercup in "Down 'N' Dirty", which causes her to get chased out of town until she finally agrees to just bathe so she can fight monsters again.
Helping Granny Cross the Street: It's occasionally mentioned that the girls do this, but it's not usually shown - it's usually listed as another one of their many good deeds.
Here We Go Again!: The ending of "Mommy Fearest" has the Professor fall in love with a woman again and once again stuttering "I...I...I". Lampshaded by the narrator.
Pretty much every townsperson and the highly co-dependent Mayor are Sheep. Explicitly lampshaded in one episode, when the girls get sick of being called on to fix every little problem. They go sit on a cloud and encourage the people to work out a solution to the Monster of the Week, but keep having to beat them over the heads with hints, in what is probably a direct Shout-Out to the "Burn the witch" scene from Monty Python and the Holy Grail.
One episode was devoted to showing how the citizens of Townsville have become so used to the girls taking care of everything from invading monsters to fires to getting cats out trees that every problem is shrugged off with, "Oh, the Powerpuff Girls will take care of it". This causes the girls to go on strike.
Reversed in "Collect Her", which had an obsessive collector of Powerpuff Girl merchandise capture the girls themselves to add to his collection. The people of Townsville paid the girls back for helping them by going to the collector's house and ripping up all his merchandise, freeing the girls in the process. Since he was a fat, bald, overweightOtaku with no powers, there wasn't much he could do to stop them.
Hollywood Science: For starters, mixing together sugar, spice, and everything nice, even if Chemical X existed and was added to the mix, would not create a trio of five-year-old girls.
Holy Pipe Organ: In the episode "The City of Clipsville" during the wedding flashback, the church organ slowly plays the variation of The Powerpuff Girls theme as the Professor Utonium is getting married to Sara Bellum, who turns out to be Mojo Jojo in disguise.
Honesty Aesop: In the episode "Lyin' Around the House", the Girls continually tell white lies, and eventually, a white creature that is the embodiment of their lies grows to a rather huge size and begins to destroy everything. The girls (and the Professor, who had been fibbing about needing to work) learn that lying is wrong.
Horrible Judge of Character: In one episode in which the Gangreen Gang are forced to attend Pokey Oaks by a truant officer, Ms. Keane accepts them with open arms, and when the Powerpuff Girls counter their antics and attempts to torment the kids, Ms. Keane only sees the Girls assault them and punishes the girls while letting the Gangreen Gang get away with it. It's only when they brutally injure the other kids in a game of dodgeball that Ms. Keane realizes that the PPG were right about the Gangreen Gang all along.
Humiliation Conga: Blossom at the end of "A Made Up Story", after she bragged about not falling victim to Mask Scara's attacks.
Humongous Mecha: The D.Y.N.A.M.O. was a giant mecha resembling an amalgam of the girls.
Mojo Jojo: I do not talk like that! The way I communicate is much different. I do not reiterate, repeat, reinstate the same thing over and over again. I am clear, concise, to the point!
In the episode "Paste Makes Waste", the Girls' classmate and Paste Eater Elmer is teased by the other students with one calling him gross as flies circle around him, another one commenting that he looks a dummy while she has buck teeth and a pig-like nose, and the third laughing that it's a "sick habit" while picking his nose.
Imaginary Friend: In "Imaginary Fiend", the PPG had to fight an Imaginary Friend who was causing trouble at school. They defeat him by imagining a friend of their own to beat the snot out of him. It's said that this episode served as the inspiration foundation for Craig McCracken's Foster's Home for Imaginary Friends and Mike Believe is the template for the later show's Mac.
Imagine Spot: Keeps coming up in "Live and Let Dynamo", as the girls try to figure out which villain has their Humongous Mecha, the Powerpuff Dynamo, and keep imagining what the recurring villains would really do if they got control of the Dynamo — the Rowdyruff Boys would force her into demeaning acts such as picking her nose, Mojo Jojo would just criticize her cockpit and leave, the Gangreen Gang would just make prank calls from within the Dynamo, the Amoeba Boys wouldn't know what to do, Fuzzy Lumpkins would make Dynamo play a banjo, and HIM would give it an extreme makeover.
Imperfect Ritual: The girls perform an imperfect ritual when they try to create more power puffs to lighten their work load. Instead of using sugar, spice and everything nice, they use artificial sweetener, twigs, and random stuff that they like. The result is a giant sized, mentally handicapped powerpuff girl Bunny, who later explodes because she's unstable.
Impossible Pickle Jar: A recurring gag involves The Mayor calling the Powerpuff Girls to open his pickle jar for him.
Improbable Age: The girls are supposedly 5 years old, but they often act rather unlike their age. Blossom even managed to somehow get a job in the episode "Not So Awesome Blossom".
Blossom: A tarot card! Girls, this is worse than we imagined! Bubbles: Whatever do you mean, Blossom? Blossom: Not only are we dealing with a petty criminal, we're dealing with... A tarot-ist. [5 second beat]
In the episode "Just Desserts", the Smiths get revenge on the Powerpuff Girls for getting Harold arrested (although mostly for ruining Marianne's dinner) by destroying the inside of their house. Much to Marianne's ire, however, that doesn't tear apart their familial bond.
In "Mommy Fearest", Professor Utonium falls in love with Ms. Ima Goodlady who is later revealed to be a disguised Sedusa. When Ms. Goodlady starts taking charge as the girls' mother figure, she tells the girls they can't fight crime until after they cleaned up the mess they made last night. The girls do so really fast, then Ms. Goodlady deliberately messes the house up and forces the girls to clean up the mess without using their superpowers.
Interactive Narrator: Especially in "Simian Says", where Mojo Jojo kidnaps the narrator and takes his place.
Invisible Means Undodgeable: Him's Magic. The Girls go toe to toe with him whenever he uses projectiles and beams. However, the moment he changes to his invisible Thought-Controlled Power, they're helpless.
Isle of Giant Horrors: There is a Monster Island, source of all the Kaiju that attack Townsville from time to time. Turns out they do it for the honor of fighting the Girls.