Section about the minor KND villains.

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Recurring Villains

Mr. Wink and Mr. Fibb

Mr. John Wink and Mr. Timothy Fibb

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Mr. Fibb on the left, Mr. Wink on the right

A pair of villains who use robotic Super Chairs to fight the KND. Mr. Wink is voiced by Tom Kenny and Mr. Fibb is voiced by Dee Bradley Baker.

Ambiguously Gay: While their extremely close relationship could be written off as a case of Heterosexual Life-Partners, the fact that they're references to a pair of fictional gay hitmen raises some eyebrows. It's eventually revealed that Mr. Fibb had a thing for Lasso Lass and wanted to go to prom with her, but this doesn't necessarily preclude him from being bisexual, and the fact that he ran away when she tried to kiss him should be taken into consideration.
Ambiguously Human: Mr. Wink has buffalo horns on his head and Mr. Fibb has tusks and flippers like a walrus. "Operation: C.O.W.G.I.R.L." confirms they were fully human at one point, but evidently something must have happened to them at some point that messed up their anatomy.
Animal Motifs: Buffalos for Mr. Wink and Walruses for Mr. Fibb. (See Above)
Bald of Evil: Mr Fibb lost his hair as a teenager, and blames that as part of his villainous personality.
Bantering Baddie Buddies: As parodies of Mr. Wint and Mr. Kidd, they were always cracking jokes on how badly the KND was doing against whatever chair-based Mecha they'd brought out to fight.
Bestiality Is Depraved: Mr. Wink is seen running away from a smitten Clip-Clop at the end of "Operation: C.O.W.G.I.R.L., which implies something going on between him and his old team's horse.
Brilliant, but Lazy: Their shtick—they must be pretty darn smart if they're able to build their Humongous Mecha chairs, but they seem to build said chairs solely so they can do all the fighting for them.
Cool Chair: Superchairs are their weapon of choice and contain a variety of weaponry.
Creepy Monotone: Though there are rare instances where they do show emotion.
The Dividual: They are hardly seen apart and do everything together. The only time one of them acts individually is when Fibb puts on a Dodgy Toupee to impress Lasso Lass.
Expy: They're repackaged versions of Mr. Wint and Mr. Kidd from Diamonds Are Forever.
Eyes Out of Sight: Mr. Wink's eyes are always covered up by his hair.
Face–Heel Turn: As children, they once fought adult tyranny themselves as part of the Cowboy Kids Club alongside Lasso Lass. Why Mr. Wink became evil is never mentioned, but Mr. Fibb says his reason was because Lass wouldn't go to prom with him, as well as losing his hair.
Freudian Excuse: According to Mr. Fibb in "Operation: C.O.W.G.I.R.L.", he and Mr. Wink "grew up" because the former didn't get to go to the prom with Lasso Lass.
Friendly Enemy: Not in the series proper, but in the pilot, they join the KND for a snack break in mid-battle.
Heel–Face Door-Slam: After Mr. Fibb breaks down at Lasso Lass and admits to his heartbreak that he felt when she rejected him years back, she comforts him and compliments his Dodgy Toupee. While he initially seems touched, he ultimately runs away when she tries to kiss him, with Mr. Wink right behind him. Their next appearances show that they're still evil regardless.
Humongous Mecha: Expect any chairs they may be sitting in to be a Super Chair of some kind.
Little Bit Beastly: Fibb has walrus tusks and flippers, Wink has buffalo horns.
Prematurely Bald: Mr. Fibb's hair started falling out when he was a young teenager. He's still bitter about that.
Starter Villain: The very first villains the KND ever face, way back in the pilot. And relatively harmless at that. All they really did is extend adult swim and keep kids away from the pool.
Unusually Uninteresting Sight: Lasso Lass is pleasantly surprised to learn that they are her childhood friends, yet seems completely unphased by the fact that they now have horns, tusks, and flippers.
Vague Age: While they appear to be in their 40s, they're also shown to have been children at the same time as the elderly Lasso Lass. It's unclear whether they're Older Than They Look or if she's Younger Than They Look.
Verbal Tic: Often asks rhetorical questions to each other, while addressing each other's names at the end of their sentences.
Villainous Breakdown: In "Operation: C.O.W.G.I.R.L.", when their Freudian Excuse is revealed. Another immediately follows when it turns out Lasso Lass really did like Mr. Fibb, but he's so shy he runs away screaming at the thought of kissing her. A similar incident occurs between Mr. Wink and Clip-Clop, and they never appear as major villains again.

Laura Limpin

Laura Limpin, aka The Big Badolescent

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Laura Limpin

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The Big Badolescent

An adorable young girl who, whenever angered, transforms into a monstrous teenager. Voiced by Grey DeLisle as Laura and Dee Bradley Baker as The Big Badolescent.

Alliterative Name: Laura Limpin.
Ambiguously Brown: Her skin is brownish, but it's unclear what her ethnicity is.
Back for the Finale: After only appearing in two episodes of the first season, she returns in the Grand Finale "Operation: I.N.T.E.R.V.I.E.W.S."
Beware the Nice Ones: Laura is unassuming enough, but her alter ego is not something to be messed with.
Beware the Silly Ones: Taking one look at her, you'd hardly believe she's as dangerous as she really is. But when she hulks out...
Does Not Like Spam: She hates coconuts and anything coconut-flavored. The Delightful Children's birthday cake being coconut is enough to trigger her turning into the Big Badolescent.
Eye Glasses: Mild-Mannered Laura has glasses that change shape to match her emotions.
Girlish Pigtails: Both of her forms have pigtails.
Girl Scouts Are Evil: She's a member of the Skunky Scouts.
Hair-Trigger Temper: Almost anything can set her off, like someone's birthday cake being coconut-flavored or someone refusing to buy her Skunky Scout candy.
Hulking Out: When she gets angry (or upset... or mildly annoyed) she turns into a horrific, monstrous teenager, twice as tall and three times as big. Fortunately, she turns back to normal rather easily.
Hulk Speak: The Big Badolescent speaks in third person and in incomplete sentences.
Mood-Swinger: She can go from cheerful to enraged in a heartbeat, so don't set her off!
Power Echoes: In the Swedish dub.
Rise of Zitboy: In her Big Badolescent form, her face is covered in pimples.
Scout-Out: In "Operation: Q.U.I.E.T.", she shows up at the treehouse selling candy to raise money for her Skunky Scout troop, and hulks out when Numbuh 3 turns down a box. She is only placated when Sector V buys a huge number of boxes from her.
Starter Villain: The very first threat fought on the show, not counting the pilot episode.
Superpowered Evil Side: Laura herself is a sweetheart Cheerful Child, but her alter-ego is most certainly not, and takes over when the normal Laura gets angry, or upset, or mildly inconvenienced, essentially being a superpowered version of a childish tantrum.
Super-Strength: The Big Badolescent is one of the strongest characters in the series, effortlessly beating the tar out of any character it meets.
Teens Are Monsters: Granted that her alter ego is one.
Unstoppable Rage: Downplayed; she's a rampaging monster when she's angry, but she's pretty easy to placate.
You Won't Like Me When I'm Angry: She becomes an acne-ridden behemoth when enraged.

The Ice Cream Men

The evil employees of the Tasty Taste Ice Cream Corporation, the Ice Cream Men usually serve as mooks for the Delightful Children and Father (and Mr. Boss sometimes). Voiced by Dee Bradley Baker, Kevin Michael Richardson, Daran Norris, Matt Levin, Maurice LaMarche, Tom Kenny, Khary Payton, and Jess Harnell.

Bad Humor Truck: They refuse to serve ice cream to children and are underlings of Father.
Child Hater: This is part of their job, as Tasty Taste Ice Cream Trucks never stop for children and only deliver to "responsible adults".
Demoted to Extra: The Ice Cream Men were major mook antagonists in the first two seasons but were gradually phased out in favor of the Six-Gum Gang and other villains as the plots shifted to more school-based stories. They never disappeared entirely however.
Depending on the Writer: They either serve Father and his children or Mr. Boss. It depends on the episode.
Economy Cast: A few of them can be seen working in Cuppa Joe's coffee drilling rig in U.N.D.E.R.C.O.V.E.R., as well as Ms. Goodwall's zoo in "Operation: Z.O.O.".
Heavily Armored Mook: As seen when they invade the KND Antarctica Base, they have armor designed like ice cream waffle cones. (These may or may not qualify as Elite Mooks.)
Improbable Weapon User: They're often armed with ice cream guns.
Punch-Clock Villain: In the sense that being villains is their jobs, it's never shown what they do on their own time.

Count Spankulot

A vampire who spanks naughty children. Voiced by Daran Norris.

Affably Evil: He's actually a pretty nice guy to hang out with when he's not on the clock.
Anti-Villain: He only spanks children who deserve it. Though Subverted in that a lot of the time he does it over minor offenses like keeping a library book a little too long. He will immediately stop and leave once he considers a debt repaid however.
Ascended Extra: Debuted as a throwaway villain in "Operation C.A.N.N.O.N.", with about 30 seconds of screentime. Later seasons gave him two spotlight episodes (three if you count "S.P.A.N.K.E.N.S.T.I.N.E.").
Bad Ass Boast: Gets one in S.P.A.N.K.E.N.S.T.I.N.E. once he gets his spanking powers back
“Those who steal the power of spankyness and combine it with fluffy stuffed animals shall feel the stingy wrath of COUNT SPANKULOT!”
Brought to You by the Letter "S": Literally. He wears a medallion around his neck with the letter "S" on it.
Card-Carrying Villain: Initially subverts this in his first two appearances, believing he's justified in spanking children over minor offenses. By Operation: L.O.C.K.D.O.W.N. he refers to his own powers as "evil" showing he now embraces his role as a villain and enemy to the KND; even attending the Villains Choice Awards and shopping at Villain-Mart. This is likely due to him being betrayed by Sector V and being put in prison.
Crouching Moron, Hidden Badass: He's one of the less cold-blooded villains, occasionally bordering on Minion with an F in Evil, but piss him off and he will destroy you. Best displayed in "Operation: S.P.A.N.K.", where he destroys Mr. Wink and Mr. Fibb's latest mecha-chair with psychic abilities.
Daywalking Vampire: Count Spankulot himself may be immune to sunlight, but not those whom he transforms into Spank-Happy Vampires.
Even Evil Has Standards: He may be a spank-happy vampire who loves what he does and does what he loves, but he only does it as a form of punishment for naughty children. In "Operation: S.P.A.N.K." he insists that he would never knowingly give an unwarranted spanking, and was borderline traumatized when he had been tricked into spanking an innocent child.
Friendly Enemy: He can be downright friendly when he's not punishing naughty children. In "Operation: S.P.A.N.K.E.N.S.T.I.N.E", he saves Numbuh 2 from Mushi's crayon barrage and later enjoys ice cream sundaes with Numbuh 2, Numbuh 3 and their families.
Friendly Neighborhood Vampire: He tries to be this in "Operation: S.P.A.N.K.", but fails miserably.
Heel–Face Door-Slam: In "Operation: S.P.A.N.K.", after being jailed for spanking an innocent child, he makes a genuine attempt at reforming himself by joining the KND, but after he annoys them one too many times, they trick him into spanking the judge that proceeded over his last trial and his wife, sending him to prison once again.
Laser-Guided Karma: Invoked. He inflicts physical punishment on children who commit wrongful acts, sometimes even adults.
Leitmotif: An Ominous Pipe Organ plays in every scene he's in.
Not-So-Harmless Villain: Generally speaking he's only a threat in the physical sense and the spanking he does, while painful, is typically an annoyance at worst. He gets led around by the nose and outdone in battle so much that he's almost a Minion with an F in Evil. Then "Operation: L.O.C.K.D.O.W.N." happened, where he transformed all of Sector V except Numbuh Five into spank-happy vampires.
Our Vampires Are Different: He's a "spank-happy" vampire, who punishes bad children and spreads vampirism by removing his gloves. He's also shown some classic vampire abilities, such as hypnosis, flight, and limited telekinesis, as well as sharing the traditional weakness to garlic (although Operation A.W.A.R.D.S implies that it may just be an allergy). It appears he doesn't need a Vampire Invitation to enter homes and spank children, though.
Pointy Ears: Bat-like pointy ears.
Power Limiter: The gloves he wears are to prevent him from turning the people he spanks into vampires.
Punch-Clock Villain: He never spanks a child who doesn't deserve it (at least in his eyes), and can be pretty friendly when he's "off the clock" and not punishing anyone.
Vampires Hate Garlic: Unsurprisingly, he can't stand being near garlic.
Vampire Vords: In shameless Bela Lugosi tradition.
Villainous Rescue: In "Operation: S.P.A.N.K.E.N.S.T.I.N.E", when Mushi is throwing a hail of sharp crayons at Hoagie, Count Spankulot appears, re-absorbs his spanking power from the Posh Party Rainbow Monkey and spanks her hard enough to make her run off crying.
Villains Out Shopping: In some episodes, he can be seen attending the Villains Choice Awards and shopping at Villain-Mart. He also has dinner with Numbuh 2's and Numbuh 3's families in "Operation: S.P.A.N.K.E.N.S.T.I.N.E".
Well-Intentioned Extremist: Only spanks kids who have done something bad, though he often does it over very trivial things (see Anti-Villain).
White Gloves: He wears these to go with his costume, but are only worn when he doesn't want to turn his victims into vampires.

Toiletnator

Lou Pottingsworth III/Toiletnator

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"Kids Next Door, prepare to be flushed!"

The most incompetent villain in the world, Toiletnator gets no respect from the Kids Next Door or his fellow villains. Voiced by Dee Bradley Baker.

Adaptational Badass:
- Most pathetic villain on the show, but he's the Final Boss on Numbuh Ones level on the "Operation: S.T.A.R.T.U.P." online game, and arguably the hardest.
- He's also a considerable Damage-Sponge Boss in the (defunct) online game "Operation: B.E.S.T.".
- He's a Lethal Joke Character in Cartoon Network: Punch Time Explosion XL.
Affably Evil: He's a pretty nice guy trying (and largely failing) to be a villain.
Arch-Enemy: He sees Numbuh 4 as his "greatest enemy." Might be reciprocated as of the Galactic Kids Next Door teasers, when Numbuh 4 specifically mentions Toilenator as one of the villains he wishes to fight in space.
Ascended Extra: He first appeared being rejected by the Delightful Children in "Operation: N.O.-P.O.W.U.H." His appearance there was originally intended to be a one-off gag, but he became a recurring character in subsequent seasons.
Berserk Button: In "Operation: C.A.N.Y.O.N.", he gets really pissed off when the Kids Next Door make one too many cracks about how he fails at being a real threat.
Butt-Monkey: Hardly anything goes right for this guy, especially when he tries to prove to his fellow bad guys that he can be a serious threat.
- In "Operation: M.O.V.I.E.", he finds himself getting violently and agonizingly crushed in the reel of a movie projector after his toilet paper gets tangled up in its spool. Somehow, he not only survives this, but comes out in one piece!
- In "Operation: F.L.U.S.H.", he accidentally sabotages the other villains' invasion of Sector V's base due to mistaking them for Sector V in disguise and ends up receiving the beating of a lifetime when the real Sector V show up.
- In "Operation: C.A.N.Y.O.N.", he hears about the Kids Next Door's plan of celebrating their anniversary by filling the Grand Canyon with Rainbow Munchies cereal and sees this as an opportunity to thwart the Kids Next Door singlehandedly and get the respect he deserves. He suffers a lot of injuries on his journey and unintentionally thwarts Mr. Boss's attempt at a sneak attack in his submarine when he uses his flushing-based powers to get rid of the milk and cereal in the Grand Canyon. By the end of the episode, he gets chased by Mr. Boss and the other villains.
- In "Operation: A.W.A.R.D.S.", an award in the show exists for "Best Toilet-Themed Villain", and one would think he would be a lock. Nope! He loses it to another villain, Potty Mouth. A villain who hasn't even been seen fighting the KND up to this point.
Card-Carrying Villain: In an interesting twist, he is trying to be this. He never can seem to cut the mustard, though.
Child Hater: For whatever reason, he hates children just as much as, if not more than, the other villains in the series.
Continuity Snarl: His backstory from the comics (including being Numbuh 4's uncle) wouldn't seem to match up with a brief glimpse of his parents in "Operation: C.H.O.C.O.L.A.T.E." where they're dressed in similar costumes to him. Of course, that was likely for the sake of a gag.
Corrupt Corporate Executive: The 19th issue of Cartoon Network Action Pack established in the story "Operation: H.I.S.T.O.R.I.E." that he was originally an ad exec selected by Father to manufacture foul-tasting vegetables.
Crouching Moron, Hidden Badass: He's show several signs of this through the series... Idiot though he may be, this does still apply.
- "Operation: F.L.U.S.H." — He takes out five other villains thinking they're KND operatives in disguise. Of course, the five villains in question had just successfully taken over the Sector V treehouse, and then (just as he thought how could things get any worse) Numbuhs 1-5 (The actual members of Sector V who have been all excused from school early) show up and kick his butt. He's even stupider than we thought.
- He does however do pretty well when Citizombified by Grandfather. He manages to transform Mr. Boss, Crazy Cat Lady, and the Tommy without any help, and even manages to track down and chase Numbuh 1 through his own house.
The Ditz: Not very bright, to say the least. In "Operation: F.L.U.S.H.", Mr. Boss mentions that he once let Numbuh 1 into their lair just because he wore a T-shirt saying "I am not Numbuh 1". The Toiletnator apparently bought it because he didn't think an article of clothing could lie.
The Dragon: In Operation: Z.E.R.O.., the Big Bad Grandfather uses him as an active agent of the Senior Citizombification to infect living humans all over the world.
Dramatic Irony: In "Operation: M.O.V.I.E.", during a secret villain meeting, he suggests that they capture Numbuh 4 because he's the stupidest member of the KND...unaware that he's being even stupider because he fails to recognize Numbuh 4 sitting right next to him wearing a Paper-Thin Disguise.
Dude, Where's My Respect?: He's treated like a joke by the KND and fellow villains alike, even though he is actually competent enough to stomp 5 other villains at once and take over KND headquarters. The biggest problem is that he's a moron with very little common sense.
Evil Uncle: The comic story "Operation: H.I.S.T.O.R.I.E." establishes that he is the long-lost twin brother of Numbuh 4's father Sydney Beatles, making him Numbuh 4's uncle.
Failed a Spot Check: When he fights his own supposed allies in "Operation: F.L.U.S.H." via a case of Mistaken Identity, everyone is wearing or holding something Sector V related thanks to looting their treehouse.. except the Crazy Old Cat Lady, who is the same as she always is, complete with cats on her shoulders. The Toiletnator just thinks she's Numbuh 2 because she's portly.
Friendly Enemy: He was friends with Numbuh 4 for a while ("Operation: M.O.V.I.E."), and joined the announcers in the finale. Though, in the CM/HB example he referred to Numbuh 4 (actually Knightbrace) as his arch-nemesis. Gets kinda weird when it's revealed in a canon comic that he's Numbuh 4's uncle.
The Friend Nobody Likes: None of the other villains have any respect for him, on account of how clueless and annoying he can be.
Granola Guy: Likes vegetables, hates meat. Largely because they're better for your digestive system.
Harmless Villain: For the most part, he's an inept clown who completely fails to be a threat toward the Kids Next Door in any way.
Heart Is an Awesome Power: His flushing powers seem kind of questionable, but "Operation: C.A.N.Y.O.N." has him flush all the milk and cereal out of the Grand Canyon, ruining the plans of the KND.
I Just Want to Be Loved: Makes it pretty clear in "Operation: F.L.U.S.H." that all he wants from the villains is to be respected and admired. And to go bowling with them on Tuesdays.
Improbable Weapon User: His theme is toilets, leading him to wield anything from plungers to rolls of toilet paper to urinal cakes as weapons... with surprising effectiveness at times.
Ineffectual Sympathetic Villain: Very ineffectual, very sympathetic. Except when he is kind of effective.
Long-Lost Relative: It is revealed in the comic story "Operation: H.I.S.T.O.R.I.E." that he is actually the long-lost twin brother of Numbuh 4's father Sydney Beetles.
The Millstone: On more than one occasion, he's hindered the other villains' operations just by being there. Mr. Boss tries to leave him out of his schemes, but he just can't seem to get rid of the guy.
Not-So-Harmless Villain: In spite of usually being seen as a joke, he does on occasion show that he can be genuinely threatening when he wants to be.
- He comes up with a plan in "Operation: M.O.V.I.E." that actually impresses the other villains. Too bad Numbuh 4 heard it first.
- He also managed to "flush" the entire Grand Canyon after the KND filled it with cereal and milk.
- In one episode, he manages to defeat the other villains single-handedly after he believes they're Sector V in disguise.
- But the most poignant example of this trope for Toiletnator is when he's transformed into a senior citizombie in Operation: Z.E.R.O. He manages to transform a good number of both heroes and villains alike into other citizombies, and manages to track down Tommy and Numbuhs 3, 4 and 1 all by himself, all while giving off a genuinely frightening presence.
Oblivious to Hatred: All of the other villains find him annoying, but he never seems to catch on.
Paper Master: His affinity for toilets extends to even toilet paper, which he can fire from his wrists as spiraling streams.
Phrase Catcher: Whenever he shows up to meet the villains uninvited, Mr. Boss will groan "Aww geez, it's the Toilenator!"
Punny Name: His first name is Lou, a play on "loo" being a British term for restroom.
Significant Double Casting: He and Numbuh 4 are both voiced by Dee Bradley Baker because they're uncle and nephew.
Throw the Dog a Bone: In the final episode, while all the other villains are taking part in a scavenger hunt, Toiletnator was having the time of his life at a toilet-themed amusement park.
Toilet Humor: With more focus on actual toilets rather than bodily functions.
Uninvited to the Party: The villains have tried to get rid of him more than once by sending him an invite far away from them. It's never worked.
Villain Episode: "Operation: F.L.U.S.H." focuses on him and his attempts at being taken seriously by his fellow villains.
Villains Out Shopping: The kids run into him grocery shopping and find that he likes the same brand of sugary cereal that they do.
Warm-Up Boss: As befitting the fact that he's the most unfortunate and pitiful villain, he serves as the boss of the tutorial level in Operation: V.I.D.E.O.G.A.M.E..
What Kind of Lame Power Is Heart, Anyway?: His motif is questionable. It also seems he's got some psychic control over flushing all sorts of liquids.
The Worf Effect: Inverted in "Operation: Z.E.R.O." — nobody's really surprised when he ends up the first victim of Grandfather's senior citi-zombie plague, but the fact that it makes him take about ten thousand levels in badass is what really hammers home what level Grandfather's power is on.

Gramma Stuffum

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An old lady obsessed with force-feeding her disgusting food to children to fatten them up, believing that a child that is too fat to move can't get into trouble. Voiced by Grey DeLisle.

Anthropomorphic Food: All her creations can move and fight independently, she's even accompanied by Liver and Onions, a sentient liver and a pair of onions who serve as her personal assistants.
Chef of Iron: A type 3 example. While she prefers to let her food do the fighting, she herself is pretty dang strong; she's been shown smashing through walls and throwing around all manner of heavy objects, and also has proven surprisingly resistant to the to the weaponry of the Kids Next Door.
Evil Chef: She's a villain who prepares food.
Evil Old Folks: One of the oldest recurring villains on the show, as indicated by her name and grey hair.
Fat Bastard: She's a chubby villain.
Final Boss: Of the online game Tummy Trouble. Most of the game is focused on getting Numbuh 1 through her kitchen and fighting her army of food along the way, facing Gramma herself for a final showdown.
Food-Based Superpowers: She can animate any food that she has cooked into a loyal minion, and can also summon food that she has cooked, animate or inanimate, to her side whatever her current position.
Force Feeding: Her modus operandi is to force children to eat until they are seriously overweight under the reasoning that if kids are too fat to move, then they can't get themselves in trouble.
Funny Foreigner: She speaks with a thick German/Bavarian accent.
Kick the Dog: She is a Well-Intentioned Extremist, sure, but she also fully admits in her own introduction episode that her food is "yucky", and she's still stuffing it down children's throats without consent. And while it's Kick The Son Of A Bitch, the moment Sector V knocked her out of their treehouse, she immediately turns back around on the Delightful Children From Down The Lane who hired her in the first place and attacks them with her food in return. She's an enemy to all children and relishes in it.
Lethal Chef: The main reason Gramma Stuffum is a villain is because her recipe book tends to be made of three categories: Stock "Yuck!" foods like liver, onion, pig snouts and Brussels sprouts; nauseating combination dishes and counter-intuitive serving styles like her liverwurst & headcheese casserole and her octopus burgers; and outright inedible food, whether that's due to just being inherently rotten or full of inedible objects like bones and hair, or it's just made from ingredients nobody would eat, like her curried rats and candied lizards. She's also a Chef of Iron, so her food is literally lethal in that it will beat reluctant diners into submission to force itself down their throats. Funnily, a few non-gross menu items have shown up amongst her army from time to time, like grilled cheese sandwiches, so she's arguably not so much a bad chef as she just has a really weird idea of what's good food. In one episode, Father gives her special thanks during a Villain Awards show for not providing the catering for the event, which gets loud applause.
Made of Iron: She's surprisingly hardy and can take enough punishment on her own to fill for several villains worth. Part way through "Operation: F.O.O.D.F.I.T.E.", Sector V outright blasts and splatters her with their weaponry and she just keeps advancing with minor scuffs to show for it- before getting back up with her Slamwitch no worse for wear a minute after she goes down. Accordingly, she's usually taken down by other means than direct combat, such as hamsters devouring her food and destroying her creations.
Prim and Proper Bun: A very Mrs. Doubtfire-esque style.
Punch-Clock Villain: According to "Operation: F.O.O.D.F.I.T.E.", anyway; in this episode, after the bell to signal the end of the lunch period rings, she graciously accepts her defeat and cheerfully notes she's looking forward to seeing them tomorrow for another battle.
Took a Level in Badass: "Operation: F.O.O.D.F.I.T.E." proves she's become more powerful with her giant Slamwich creation.
Stout Strength: She's overweight yet very strong.
Villain Song: She gets two musical numbers in the episode "Operation: F.O.O.D.F.I.T.E." while trying to take down the Kids Next Door with her yucky food minions. The first is an ode to herself and an explanation of her mission, whilst the latter is a bragging song about the power of her ultimate minion, Slamwich. And she has musical backing from GWAR, no less!
Well-Intentioned Extremist: She thinks all children are starving, and wants to feed them. Unfortunately, her food is horrible, and she stuffs children until they have terrible tummyaches. She even considers fat kids to be skinny. She also thinks that making kids fat and putting them in food comas will keep them out of trouble.
Why Did It Have to Be Snakes?: Hamsters, they've defeated her on at least two occasions.
Wicked Witch: Wears a witch's hat in Operation: F.O.O.D.F.I.T.E., and it may be an explanation for her powers.

Knightbrace

Knightbrace / Mr. Jelly

A villain obsessed with dental and oral hygiene. He was kicked out of dental school due to wanting to put braces on babies and was forced to work in his family's candy shop, where the sight of children ruining their teeth with sugar drove him to madness, and eventually dental vigilantism. Voiced by Tom Kenny.

Bad People Abuse Animals: A photo from his childhood show that his dental ambitions began when he pulled a tooth from his dog.
Braces of Orthodontic Overkill: Wears a set as part of his costume (which can be used as a throwing weapon), and likes to forcibly attach these to kids as well. In his debut episode, he forced a giant set of metal braces on Numbuh 4 that were big enough to cover his entire face.
Card-Carrying Villain: After his first appearance, he seems to have embraced his villainous identity.
Demoted to Extra: Despite being a recurring minor villain in later seasons, his introductory episode is the only one that gives him spotlight.
Depraved Dentist: A failed dentist who delights in forcing torturous dental treatments on children. The reason he's a "failed" dentist is because he was barred from the profession after he tried to put braces on babies.
Doctor's Disgraceful Demotion: Before he became the supervillain Knightbrace, Mr. Jelly was kicked out of dental school for trying to put braces on babies. Now he runs around trying to force torturous dental treatments on children.
Does Not Like Spam: He's the only character in the series, hero or villain, who doesn't like Rainbow Munchies cereal.
Eviler than Thou: Played for Laughs. In "Operation: M.U.N.C.H.I.E.S." the villains are horrified to learn that he was going to destroy the last box of Rainbow Munchies cereal because it was bad for your teeth. They pull an Enemy Mine with the KND and beat him up.
The Friend Nobody Likes: The other villains aren't too fond of him, since he takes away the food they like as well. The only reason he isn't the Butt-Monkey of the villains is because A) he's actually fairly competent and B) they hate the Toiletnator even more.
Hypocrite: He despises selling candy to kids, but he absolutely loves taffy.
Irony: As a dentist, he is opposed to candy and all sugary foods, but his favorite food is taffy.
Knight Templar: He wants children to have good dental hygiene. The problem is, he wants to FORCE kids to have good dental hygiene, and was blacklisted from dentistry due to his psychotic obsession, especially when he attempted to put braces on babies (who don't even have teeth in the first place).
Secret Identity: Initially Mr. Jelly used Knightbrace as an alias so he could "undo his damage" as a candy shop owner. After his debut episode, he almost exclusively appears as Knightbrace with nary a mention to his actual identity.^note Though he does briefly appear without his costume in "Operation: A.W.A.R.D.S." due to it being stolen by the KND beforehand.
Start of Darkness: Claims he was "driven to near-madness" after being forced to watch children ruin their teeth with the candy from his store, and became Knightbrace as a result. As Dr. Teef points out, he was already crazy long before he became Knightbrace.
Trademark Favorite Food: Taffy, which is a problem, since he will go nuts for the stuff and is easily defeated by it.
Uncertain Doom: In "Operation: I.N.T.E.R.V.I.E.W.S.", he and Potty Mouth are last seen at the mercy of a Queen Tie. It's not clear whether the Queen Tie killed them or simply turned them into accountants.
Villain Has a Point: While he is not right in the head, he is right to be horrified at the state of Sector V's teeth in his debut episode. All of their teeth are either rotten or missing.
Weaksauce Weakness: If a large quantity of taffy (his favorite food) is thrown in his direction, he will be too distracted eating it to focus on anything else.

Stickybeard

Captain Stickybeard

A spirited candy pirate who loots and plunders candy from neighborhood children. He respects Numbuh 5 and seeks her as an apprentice. Voiced by Mark Hamill.

Affably Evil: When candy's not involved, he's actually a fun guy to hang out with. It helps that he has something of a code of honor.
Always Someone Better: When it comes to consuming sugar, he's still second to both Numbuh 5 and Black John.
Badass Normal: Among few villains that don't have superpowers.
Captain Colorbeard: Or Adjective-beard.
Card-Carrying Villain: Like the others, goes to villain support groups and meetings.
Dressed to Plunder: He wears an eyepatch, a black bicorne hat with a skull on it, a Blackbeard-style beard (with candy stuck in it), and a peg-leg and hook-hand both made from candy canes.
Eaten Alive: Parodied. His defeat in his debut episode "Operation: P.I.R.A.T.E." has him covered in some of his own candy right as he's about to try to finish off Numbuh 5, only for the children of the school his ship crashed on to swarm him and eat the candy off of his body in a humiliating defeat that is very reminiscent of this.
Enemy Mine: With Numbuh 5, against Black John Licorice.
Even Evil Has Standards: He considers the idea of anyone dying at the hands of the Great White Asparagus so horrifying that he doesn't hesitate to save even the KND from the monster. He even told Numbuh 5 to not mention the incident to the other villains. He also thinks Black John Licorice is just so plain immoral and evil as his former captain that he has no qualms about helping Numbuh 5 and Heinrich beat John.
Fat Bastard: He's chunky and he likes to steal candy from kids.
Friendly Enemy: With Numbuh 5 (at least).
From Nobody to Nightmare: Was once a lowly cabin boy under the vicious candy pirate Black John Licorice. Back then he was known as "Stickyfuzz".
Hidden in Plain Sight: His candy stealing strategy in "Operation T.R.I.C.K.Y." is to take his multi-story sized pirate ship and strap a fake house to its side before hijacking any unsuspecting trick-or-treaters. Never mind the gigantic crater trails in the buildings and environment left in the ship's wake. Somehow this works, though the only person we see it succeed against on-screen is Numbuh 4.
Hook Hand: With a candy cane instead of a hook.
A Lighter Shade of Black: Compared to most villains on the show. The only reason he's an antagonist to the KND is because he loves sweets and is willing to steal from kids to get them. There are multiple instances where he enters an Enemy Mine with the KND because of a different villain attempting to either horde candy/destroy candy so no one can have it, and even comes to the main groups rescue a few times when they were in genuine danger. (Such as almost being Eaten Alive by the great white asparagus.)
Manchild: With his bombastic behavior and love of candy, he's quite childlike. Notably this helps to characterize him as not so different to the protagonists and makes him one of the more sympathetic members of the rogues gallery.
One Degree of Separation: Numbuh 5's other candy rival, Heinrich, was once his cabin boy.
Pirate: He's a pirate who searches for candy rather than treasure.
Serious Business: Candy stealing is his prime modus operandi. Get in the way of that, and you're good as dead. And also being told that he was "sugar-free".
- Being called "sugar-free" is Serious Business to any candy pirate as he says this to Black John Licorice and Numbuh 5 say this to him.
Sticky Situation: His entire body is sticky due to the amount of candy he's constantly surrounded by. As a result, he always has some stuck in his beard that he'll occasionally pull out and suck on (albeit with some hairs stuck to it).
Sweet Tooth: Stickybeard loves candy.
Talk Like a Pirate: Of course, since he's an odd Expy of Blackbeard.
The Tooth Hurts: Has lost most of his teeth to tooth decay thanks to his sugar addiction, and the few that are left look like they're on their last legs. In his debut episode, he offers Numbuh 5 the job as his apprentice, with the incentive that once his last tooth falls out, she'll take his place and inherit his candy fortune.
Villains Out Shopping: When he attacked the treehouse on the night Numbuh 1 needed rest, Numbuh 5 asked why that night, to which he replies that "he bowls on Tuesdays".
- He was also seen getting groceries at the villains' supermarket in "Operation: M.U.N.C.H.I.E.S."
We Can Rule Together: To Numbuh 5. It almost succeeded until she remembered her friends, after which she became his Arch-Enemy — and his sole Worthy Opponent.
What You Are in the Dark: In the past and present, Stickybeard's faced temptations to do horrible things and be the top candy pirate. Even when presented with the opportunity to leave Numbuh 5 and the entire Sector V team to their dooms, or for personal vengeance upon Heinrich when the licorice tree seed was about to kill him, Stickybeard still goes out of his way to save them at no personal gain to himself, compared to his former boss, Black John Licorice.
Wild Card: He and his crew are out for sweets. Kids are easy targets, but he's just as willing to go to war with fellow adults to grab some cereal if it's the last box. Combine this with his penchant for an Enemy Mine if he and Numbuh 5 share a common foe, and he can be just as good as he can be evil — and Even Evil Has Standards as he is fair to his word rather than prone to backstabbing, compared to the horrible morals of other candy thieves like Heinrich and Black John Licorice. If she's in a pinch, Numbuh 5 has gone out of her way to recruit him because of this.
Worthy Opponent: To Numbuh 5. She's the only person in the world who can beat him in a sugar swallowing contest (Black John Licorice might disagree). She's the only one to give him an affectionate nickname of "Sticky Buns" in return.

Professor XXX-L

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His appearance in C.O.L.L.E.G.E.

An insane scientist whose main goal is to create the perfect snowcone. Voiced by Frank Welker.

Aesop Amnesia: Not for him, but for Sector V. Everyone keeps thinking he's up to some no-good, heinous and evil plot every time he appears — despite the fact that, since his proper debut in "Operation: A.R.C.T.I.C.", he's only ever wanted to develop the perfect snow cone and nothing more. While does kidnap Numbuh One without giving any warning or context to his team which is going to make anyone think he's evil, he also horribly justifies himself while acting like an evil scientist, which further vindicates everyone antagonizing him.
Animorphism: In every appearance he makes, he has a different animal body part in place of his own. Before appearing in KND, he had a large lobster claw instead of an arm (he ended up losing it in a fight with the local PTA). In his first KND episode, he had a turtle shell, and later still he showed up with octopus tentacles in place of legs.
Anti-Villain: He's never a villain in any of his appearances. He's always doing something innocuous (usually trying to invent a perfect snowcone) that is mistaken for villainy by the KND. The only reason he could be called a villain at all is that he gives the kids enough of a fight to be the main antagonist in all of his episodes, plus he's at most villain gatherings and shops at a grocery store meant for villains.
Bait-and-Switch:
- Turns out that he wasn't the evil scientist trying to create a machine to permanently end snow days, that's the guy next door.
- His successful kidnapping of Numbuh One was simply to harmlessly use him as a taste tester to help develop the perfect snowcone, which he can't develop on his own due to being susceptible to brain-freeze.
Beware the Silly Ones: While he's not at all malevolent and generally comes off as a harmless eccentric, he does have the potential to be genuinely dangerous, as shown by his conflicts with the KND.
Big Fun: He’s easily one of the wackiest characters in the entire show, thanks to how he has a different random animal body part every time he appears, his Large Ham tendencies and eccentric, very lively and energetic personality, and his obsession with making the perfect snowcone.
Early-Installment Weirdness: Appears in the Kenny and The Chimp short that was the original pilot for the series, as a mad scientist fighting against the Parent Teacher Association. In this version he also collects a large amount of deadly disease samples, though he has forgotten why he's doing it.
Fat Bastard: Subverted. He's fat and the Kids Next Door have fought him on many occasions, but all he really wants to do is create the perfect snow cone.
Goal in Life: His mission statement is to create the world's most perfect snowcone.
Impossibly Delicious Food: His goal is to make the world's most perfect snowcone. He manages to succeed in Operation: C.O.L.L.E.G.E., if Numbuh One's statement at the end of the episode is any indication.
Irony: The biggest obstacle to his goal to perfect the snowcone is the fact that he suffers from ice cream headaches very easily. Not only would he have difficulty enjoying one if he ever succeeds, it's hard for him to taste test his experiments.
Large Ham: He may not be an actual Mad Scientist, but he's just as over the top as any self respecting mad scientist.
"Welcome to the secret laboratory of... PROFESSOR TRIPLE EXTRA LARGE!
Little Bit Beastly: He has a different animal feature every time he's seen. Sometimes he has a turtle shell on his back and other times he's had, say, a beaver's teeth and tail.
Mad Scientist: Subverted; he looks and acts like one, which makes the KND assume the worst of him, but all he ever does is make frozen desserts.
Surreal Humor: He owes his entire existence to this trope, due to being a zany scientist who has constantly changing animal body parts and an obsession with making the perfect snowcone, as well as an unfortunate tendency to accidentally get into trouble with our heroes.
Transplant: From the 1997 Kenny and the Chimp short that indirectly led to KND (the KND were conceived as recurring characters who would cause trouble for Kenny and Chimpy).
Villainy-Free Villain: He may be the least evil villain the KND have ever fought next to the Toilenator. Yes, he did kidnap Numbuh 1 but it was for harmless research purposes and once he explained it to him, Numbuh 1 agreed to help.

Chester

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In his first appearance

A man who has been seen conducting various money-making operations at the expense of children. Voiced by Tom Kenny.

Annoying Laugh: His Verbal Tic has him deliver a grating chuckle into every one of his sentences.
Bald of Evil: He's bald to the point where he almost resembles Dr. Eggman with his mustache.
Cast as a Mask: "Operation: S.A.F.A.R.I." has him pretend to be a doctor named Julius B. Sharp, who’s voiced by Jess Harnell before his true identity is revealed.
Fat Bastard: He's overweight and a greedy jerk.
Faux Affably Evil: He has a very upbeat and cheerful manner of speaking, a "customer service"-like tone of voice. That usually goes away once his evil plans are revealed.
Greed: His evil plans usually involve money.
Hate Sink: He's a greedy Fat Bastard who would and has endangered children's lives for the sake of money.
Human Resources: He opened a restaurant that made children into burgers for sharks in "Operation: F.A.S.T.-F.O.O.D."
Hunting the Most Dangerous Game: One of his plots revolved around hunting children with a rifle that shoots syringes that turns them into moose. This turns out to be a nightmare Numbuh 1 is having.
Jerkass: Not one redeeming value was ever shown for Chester, which is all well because he's tried to outright get children killed to line his pockets, with no discrimination between Kids Next Door or innocent.
Knight of Cerebus: Though not as evil as Father, Chester's acts of villainy are generally portrayed in a worse light than other villains. Doesn't help that episodes focusing on him tend to be more psychologically disturbing.
Lotus-Eater Machine: In "Operation: U.T.O.P.I.A.", he trapped Numbuh 1 in a machine he designed for parents to put their kids in, which would render them all happy and docile. The machine creates a virtual paradise for the wearer.
Mad Doctor: His alias as Dr. Julius B. Sharp in "Operation: S.A.F.A.R.I.", since he used inoculations to turn children into moose so he could saw off their antlers and use them to make an ice cream product known as Moosicles.
Mad Scientist: He occasionally facilitates his schemes using his own bizarre creations and inventions.
The Sociopath: Despite his status as a minor villain, Chester's level of depravity manages to rival that of Father, if not worse. Many of his schemes are illegitimate businesses that involve severely injuring or even killing children (KND or innocent, he doesn't care) all for a quick buck.
Summer Campy: In "Operation: C.A.M.P.", he ran a camp so he could brainwash children into making him lanyards and wallets to sell for profit.
Tom the Dark Lord: Probably the only villain on the show with a regular-degular name, no titles or puns or anything.
Vile Villain, Saccharine Show: Most KND villains either have some redeeming qualities or are Laughably Evil, but Chester's schemes involve seriously injuring or killing children for profit.
Would Hurt a Child: Most KND villains are willing to do this, but he's notable for being one of the few villains that goes after completely innocent children instead of merely KND agents.
- Notably, unlike some villains who just detain or capture children for being a nuisance, Chester outright tries to set up a burger chain that feeds children to sharks so he can profit off it.
- Even his first appearance involves him threatening to throw a baby skunk named Bradley into a lake.

Common Cold

The Common Cold

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An eternally diseased villain who wishes to spread his cold to everyone else in the world. Voiced by Tom Kenny.

Alliterative Name: Common Cold.
Artistic License – Medicine: As stated below, one of the Common Cold's weaknesses is Vitamin C, which is found in orange juice. However, Vitamin C neither treats nor cures the common cold in real life.
Conjoined Eyes: He has those in most shots he appears in, though apparently, the picture above shows him without conjoined eyes.
Demoted to Extra: Like Knightbrace, his debut episode is also his single major appearance, with subsequent ones having him relegated to cameos or indirect involvement (like in S.N.O.W.I.N.G.).
Evil Is Hammy: He tries to be with dramatic phrases and speeches, but ultimately fumbles thanks to his cold.
Evil Is Petty: He thinks the world deserves to share his cold just because he's eternally sick.
Evil Uncle: In Operation: S.N.O.W.I.N.G., he’s revealed to be the uncle of Anna Worthington, secretary of James Nixon McGarfield.
Jerkass: Unlike most other villains, he doesn't get any other episodes to have a significant appearance in as anything other than a comedic Butt-Monkey, leaving his only major appearance (outside of Operation: V.I.D.E.O.G.A.M.E.) as betraying Tommy after a brief Enemy Mine and attempting to hit the whole world with the flu. This makes him one of the few antagonists in the series that never really gets any lighter shade to his objectives.
Meaningful Name: He's constantly under the sway of a common cold. Which he’s weaponized. It's exactly as disgusting as it sounds.
"Oh, Crap!" Fakeout: In round two, Numbuh Two keeps hitting him with orange juice cartons, and feigns injury every time to rub it in with his new upgrades.
Plague Master: Has successfully weaponized his own cold.
Precision F-Strike: His voice actor slipped in a subtle and low swear when he's baffled by Numbuh 2's mother pulling out chicken soup.
Share the Sickness: He wants to spread his cold to everyone else.
Weaksauce Weakness: Owing to his "powers", he can easily be disabled by classic home remedies like chicken soup or orange juice.

Mega Mom & Destructo Dad

https://static.tvtropes.org/pmwiki/pub/images/destructo_dad_mega_mom.jpg

A husband-wife supervillain duo equipped with "stupefying beam" technology. They are Chad/Numbuh 274's parents.

Amazingly Embarrassing Parents: Chad at least thinks so. That's what you get when you freeze all of your son's friends and teammates.
- Sending out invitations to Chad's thirteenth birthday party is definitely embarrassing for him.
Anything but That!: The thing that finally gets them to revert everyone to normal? Chad calling up "Joe's Tattoo Parlor" and all set to make an appointment. Especially funny since Chad was 12 when this episode took place, and he couldn't even legally get a tattoo in the first place.
Archnemesis Dad: Both are this to Chad, at least back when he was a KND operative.
Battle Couple: Of course.

Numbuh 3: If there is a Mega Mom, shouldn't there be a Dad too?

Demoted to Extra: Despite their threat level and relationship to one of the more important supporting characters, the two are relegated to voiceless cameos after their debut episode, before outright vanishing after Operation: Z.E.R.O., not even returning for the scavenger hunt in the finale.
Education Mama: Considering all the extracurricular activities Chad takes. He's able to defeat them partly by simply quitting said activities over the phone, horrifying them into submission.
Freeze Ray: Their "stupefying beam" is pretty much just a non-cold version of this.
Innocently Insensitive: Mega Mom sent out invitations to several of Chad's KND friends for his 13th birthday,despite the fact that he told her he didn't want a party, inadvertently giving Numbuh 1 the clue he needs to discover and expose Chad's treachery.
Invincible Villain: They achieved a Near-Villain Victory by pretty much paralyzing every KND member in the world save for Chad, who was literally the only person who could stop them.
Knight Templar Parent: Coupled with Over-Enthusiastic Parents. The whole reason they went into a crusade against the KND is because they wanted Numbuh 274 to be recognized as Number One, not aware that the Kids Next Door's only uses numbers as codenames instead of anything denoting rank.
Luke, I Am Your Father: They reveal their own identites to Chad at the end of the episode. Notably, their real faces don't look much different from their mask helmets, making The Reveal a bit nonsensical.
Nice Job Fixing It, Villain: Chad's mom more or less revealed he was turning 13 thanks to her making invitations to his (unwanted) birthday party and thus exposing his Frame-Up plot in decommissioning Sector V.
Talking the Monster to Death: Chad literally lays the hurt on his parents through reputation-ruining calls from his cellphone, exploiting how much pride his parents have over his social life.
Unholy Matrimony: They are Chad's parents after all.

Crazy Old Cat Lady

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An old woman who lives with thousands of black and white cats. Voiced by Grey DeLisle.

Actually Pretty Funny: She can be seen snickering in F.L.U.S.H. when the Toiletnator compares Mr. Boss's bald head to that of Numbuh One's, offending him.
Ambiguously Human: She has several feline traits, including claws and cat-like facial features, and has an incredibly strong sense of smell. Whether she's a human who just happens to look like a cat, some kind of human-cat hybrid, or something else entirely is never made clear.
Animal Motifs: Cats. She has whiskers and claws and sort of sounds like a cat if it could talk.
Attack of the 50-Foot Whatever: She can summon her cats to form a giant cat monster which she controls from the mouth.
The Beastmaster: Can command her cats to do her bidding.
Card-Carrying Villain: Interestingly, she was just an obsessive recluse in her first appearance. Afterwards, she's in all of the villain groups with the others. (Presumably the KND's rescue of Numbuh 4 incited her; she was known to them but she didn't seem to have met them prior.)
Cats Are Mean: Being half-human, half-cat and owning a large amount of cats who follow her every evil command.
Crazy Cat Lady: Very, very crazy. She has more cats than Los Angeles has people and she never lets any of them out of her sight or out of the house. She also seems to have some sort of empathetic bond with them.
The Dreaded: In her debut episode C.A.T.S., when Numbuh Four was catapulted, One dreadfully remarks Four is heading for HER house. Numbuh Three on the other hand doesn't fear here at all, matter of fact she adores her cats and occasionally cuddles with them (CATS, ZERO, MUNCHIES).
Fat Bastard: The Toiletnator even points out her obesity in "Operation: F.L.U.S.H." when he calls her "portly" while mistaking her for a disguised Numbuh 2.
Little Bit Beastly: She has claws and whiskers.
The Nose Knows: She shares the heightened senses of her pets, and has a superhuman sense of smell.
The Pig-Pen: Like a lot of animal hoarders, her house is disgusting and almost toxic to enter.
Shout-Out: In "Operation: F.I.S.H", she imitates Sauron.

Mr. Fizz

Mr. Angelo Fizz

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The head of the Soda Control Board, who has attempted to outlaw soda consumption by anyone under 13 years of age. Voiced by Jeff Bennett.

Archenemy: He has a particular vendetta against Numbuh 2, due to him being the primary soda smuggler for those under 13. The two episodes where he was the main villain also had Numbuh 2 as the primary protagonist.
Child Hater: Like most villains in the series. His particular gripe stems from what he see's as their inability to control their consumption of soda (which is rather rich considering he's practically a soda addict himself).
Mr. Fizz: Children. If only you could bottle their delightful precociousness. Until they've grown up.
Disability Immunity: So many soda bubbles have gone up his nose that he's lost all sense of smell. Which makes him immune to Bradley's stink missiles
Edible Ammunition: Has a multitude of gadgets from guns to tanks to Powered Armor, all of which uses soda as its main ammunition.
Final Boss: He is the last and only boss fought in the Game Boy Advance game Operation: S.O.D.A.
Hypocrite: He goes off on children for being soda addicts, when it's clear to anyone with eyes that he's far more addicted to soda then anyone.
I Need a Freaking Drink: G-rated version but whenever he gets stressed, he tends to steady himself by drinking copious amounts of soda. Considering an offhand line he gave about trying to keep from drinking too early, he's basically the soda equivalent of an alcoholic.
Lean and Mean: He's thin and not a nice guy.
No Celebrities Were Harmed: He's an Expy of Ricardo Montalbán, for some reason; he even wears a white suit like Mr. Rourke.
Sinister Shades: He wears opaque, purple sunglasses.
Soda Can Shakeup: How he's defeated in his first appearance. His suit of armor uses soda as its weapon which means if he's subjected to too much shaking, the carbonation of the soda will build up until his suit explodes.

The Senior Citizen Squad

Lydia, Sheldon, Maurice

A trio of senior citizens led by Numbuh 2's grandmother who are able to temporarily revert to a more youthful form by using Anti-Aging Creme. Their ultimate weapon is their Combining Mecha, the Senior Citizen Robot. Voiced by Candi Milo, Tom Kenny and Dee Bradley Baker respectively.

Anti-Villain: They're generally more interested in their own ends than anything else. They do hijack a tapioca truck and attack the KND, but as far as villainy goes, that's about it. Really, they'd barely qualify as villains at all if not for the above. In fact, they downright help Lizzie in Operation: L.U.N.C.H., though primarily because they're all sick to death of the food they can't eat that Robin Food keeps bringing them.
Combining Mecha: The Senior Citizen Robot, formed of Maurice's wheelchair for the legs, Sheldon's walker for the body and Lydia's cane for the arms.
Deadly Disc: Maurice's wheel shields double as throwable disc weapons.
Flight: Sheldon's walker wings allow him to fly.
Fountain of Youth: They can temporarily revert to teenage forms with the use of Anti-Aging Creme, although it doesn't last very long.
Hazy-Feel Turn: Their conflict with the KND ceased when it was revealed that they had no malicious intentions with the tapioca pudding. However they can still be seen at villain gatherings on a few occasions, in their teenage forms no less.
Hour of Power: The Anti-Aging Creme allows them to fight on even terms with the KND, but it lasts for a pitifully-short amount of time.
Senior Sleep-Cycle: Maurice is often seen asleep.

The Interesting Twins from Beneath the Mountain

https://static.tvtropes.org/pmwiki/pub/images/1000003614_9.jpg

A pair of Japanese twins who work for Father. Voiced by Tom Kenny and Tara Strong.

Butt-Monkey: Where to begin... they get attacked by a dog, have their most destructive vehicle destroyed, get beaten up by the Japanese KND operatives, disguise themselves as a KND operative only to get attacked by Wink and Fibb, and the Crazy Old Cat Lady. Seriously, compared to these guys, Numbuh 4 is the luckiest kid in the world.
The Chew Toy: Their debut episode is pretty much eleven minutes of them suffering a lot of Amusing Injuries, even getting literally chewed twice by a rabid dog.
Creepy Twins: They're an evil and sinister pair of twins.
Eerie Pale-Skinned Brunette: They're villains with black hair and pale skin.
Even Evil Has Loved Ones: The brother comforts the sister after her Villainous Breakdown in their debut episode.
Finishing Each Other's Sentences: They often finish each other's sentences, being twins.
Foil: While the Delightful Children are the perfect example of the Creepy Child trope, the Interesting Twins are much more emotive with the sister being Hot-Blooded that usually gets Blinded by Rage and the brother being a more pragmatic Shrinking Violet.
Half-Identical Twins: They're twins of different genders, complete with Yin-Yang patterns on their faces to really drive the point home.
Ineffectual Sympathetic Villain: These two suffer so much injury and failure, you can't help but feel a bit sorry for them.
Masculine Girl, Feminine Boy: Both of them.
Master of Disguise: They can make themselves look like anyone. They just have the misfortune of going up against foes who are better at disguises than them.
No Name Given: They refer to one another as "Brother" and "Sister", respectively.
Polar Opposite Twins: While they've been Delightfulized by Father like the Delightful Children from Down the Lane, unlike the Delightful Children they don't act as a Hive Mind and have different personalities. The sister is the more dominant of the two, being more volatile, paranoid and quicker to anger, while the brother is calmer and more sensible but also more timid. Oddly enough, this swaps during their Villainous Breakdown, with the sister breaking down in tears while the brother rants and vows revenge.
Red Oni, Blue Oni: The sister and brother fulfill these roles respectively, with her being more quick to anger and impulsive while he's more sensible and calm.
Villainous Breakdown: The sister is eventually driven to a meltdown when they find out Numbuh 3 was just leading them into a trap after all the trouble they went through, and the brother rants at the KND for making his sister cry as well as vowing revenge before they escape.
What the Hell, Hero?: The brother's response when the KND makes his sister cry for not being their targets.

The Six-Gum Gang

Lunk, Runt, Dixie, Goof, and Wilbur

https://static.tvtropes.org/pmwiki/pub/images/sixgumgang.png

A gang of cowboy-style robbers who work for the Delightful Children From Down The Lane. Voiced by Jennifer Hale (Runt and Dixie), Tom Kenny (Goof), Ben Diskin (Wilbur) and Dee Bradley Baker (Lunk).

Abnormal Ammo: Their iconic guns shoot wads of chewing gum.
Cowboys: Meant to be like train robbers straight out of a western.
The Bad Guy Wins: They managed to make off off with all the kids' homework despite Numbuh 4 and 5's efforts to stop them. However it winds up subverted as since the homework at the top of the pile was Wally's when they gave it to the Delightfuls. The teacher chews them out for how utterly sloppy "they" did, rendering the gang's efforts for nothing.
Quirky Mini Boss Squad: A gang of criminals in service to the Delightful Children.
Revolvers Are Just Better: Their primary weapons are six shooters that shoot chewed up bubble-gum.
The Smurfette Principle: Dixie is the only girl on the team.
Unexplained Recovery: Lunk was delightfulized by the Delightful Children in "F.O.U.N.T.A.I.N.S.", which is supposed to be permanent. He's back to his normal self in later appearances, however.
Villainous Crush: Lunk calls Numbuh 5 gorgeous and offers to let her keep her homework in exchange for a kiss. Numbuh 5 refuses. Lunk apparently hasn't changed his mind in "E.L.E.C.T.I.O.N.S."
Villains Out Shopping: They're seen casually enjoying Joey's dancing at the Butt Buster Playground Tournament in "S.A.F.E.T.Y."

Heinrich Von Marzipan

^{Click here to see spoilers:}

"Ach, liebschen, I say so many things I do not mean. Like, 'ah, no more candy for me,' or, 'who would like some of my lollipops?' "

A former friend of Numbuh Five and current candy-hunting rival. He greedily seeks forbidden candy regardless of the consequences. Voiced by Dee Bradley Baker/Candi Milo.

Aesop Amnesia: After spending the entirety of Operation: C.H.O.C.O.L.A.T.E sick of sweets due to his touch turning everything he lays his hands on into chocolate, the next time we see Heinrich he's right back to sweets.
As Long as It Sounds Foreign: Sometimes shouts German-sounding nonsense, which is funny because his voice actor speaks fluent German.
Arch-Enemy: He is Numbuh Five's most personal adversary.
Ax-Crazy: The further he morphs and transforms due to the consequences of his own crimes, the more unhinged he becomes, culminating in the chocolate monster incident where he straight up is a vengeful force of inhuman nature attempting to murder Numbuh Five.
Brought Down to Normal: Got turned into a chocolate monster that can turn anything he touches into chocolate. After Numbuh Five defeats him, the KND turns him back to normal.
The Cabin Boy: Heinrich served as one for a while on Stickybeard's ship.
Card-Carrying Villain: Though likely because the cursed caramels have explicitly made him evil.
Character Development: Only in his final episode, Operation: C.A.R.A.M.E.L., when he finally takes Abby's pleas to heart as the requirement of finally sharing his candy. This gets her back her beauty to finally return to who she once was.
Does Not Like Spam: He hates pickles.
Disproportionate Retribution: At first he just seems to be trying to get rare candies first over Numbuh Five, holding a grudge over Guatemala but only attacking her once she goes out of her way to pick a fight with his men. Then he gets foiled, repeatedly, and escalates his greed and retribution from simply being a candy thief to incapacitating and attempting to kill any Kids Next Door operative in his path. He doesn't even dance around the fact that he'd also considered eating Numbuhs Two and Five when the potential of them being turned into chocolate is on the table, solely for getting in his way of trying to eat a real bunny turned chocolate.
Evil Cannot Comprehend Good: He never learns that sharing one's candy is better then trying to have it all to yourself. It was the reason she was changed into a boy in the first place due to a curse to get delicious caramels. Heinrich nearly made it permanent in her final appearance until Numbuh Five has to practically spell it out for her that if she shares it'll finally break it. Thankfully she finally listens and got her rightful gender back.
Evil Former Friend: Numbuh Five's. They used to be candy-hunting partners, but the events of Guatemala caused them to become enemies. After breaking the curse of the caramels, Henrietta and Numbuh Five go back to being friends.
Fatal Flaw: Greed. He's a selfish brat who simply refuses to believe sharing your candy is better than keeping it all to yourself. This is why he constantly gets the short end of the stick in his candy hunts, trying to take everything but winding up with nothing time and again. He believes Abigail simply wants the candy he's after all to herself too and would never share with him.
Fat Bastard: He's a little chubby and he's not very nice. As Henrietta, she's much thinner and nicer.
Gender Bender: In sacrificing her beauty, she switched genders. She's actually a girl.
Greed: Obsessed with getting candy and never sharing it, which usually leads to many of his downfalls.
Heel–Face Turn: Once the curse over him is lifted, she goes back to the way she was before and vows to make amends for her wrongdoings.
High-Class Glass: A very classy monocle. It's unknown if he's a blue-blood himself, but it would make sense, given his resources and free time.
Homage: He's a nod to Indiana Jones Nazi villains, René Belloq in particular. Considering he's an overweight German boy who's obsessed with sweets, he's also likely an homage to Augustus Gloop from Charlie and the Chocolate Factory.
I Lied: As his quote indicates, he's prone to lying when he promises to change for the better.
Insane Troll Logic: He will always find some way to make any misfortune he suffers into Numbuh Five's fault, even when she outright warns him what will happen. Best seen in "Operation: C.H.O.C.O.L.A.T.E." where he wants revenge on Numbuh Five for circumstances that are entirely of his own making.
Irony: As a bout of Laser-Guided Karma, every time Heinrich seems to have found some great deal of new power, it always turns the target of what he wants to eat into the very thing he became, effectively rendering such an effort moot in the first place. He also gets a second dose of this when the thing he had been searching for all this time, his last cursed caramel that started all of his villainy in the first place, was under his nose the entire time in Numbuh Five's hands, which would've doomed his entire search if he ever actually managed to kill her in his repeated attempts.
It's All About Me: He quite literally rants at one point that all of the world's candy should be his, he is quick to discard or brush aside his hired goons if they aren't doing their work exactly as he wishes, and he'll crush any kid that gets in his way without even an ounce of hesitation if it fulfills his Greed. Were it not for Henrietta turning out to be a fairly good person, you'd think he'd have to be born a Grade-A sociopath, though that might be part of the consequence with what she lost for the caramel curse.
Never My Fault: He does this a lot, such as in his first appearance where he blames Abby for tainting the candy with the taste of asparagus when she warned him beforehand that being greedy will put that curse into effect. It's also his grudge for the Guatemala Incident as after he sacrificed his beauty due to yet another curse. He once more blamed Abby for not stopping him from eating his caramels and supposedly leaving him stuck in that state. Turns out she stole his last caramel because she knew the cure required a sacrifice she knew he wouldn't make.
Noodle Incident: Throughout the series he remains angry at Numbuh Five for "Guatemala". His last appearance in Operation: C.A.R.A.M.E.L. reveals that she performed a ritual to get delicious caramel by sacrificing her best trait (in his case her beauty) and blamed Numbuh Five for allowing it to happen.
One-Winged Angel: In his first appearance after obtaining a jewel, he transforms into a monster with power of candy. Numbuh Five defeats him. After falling into a chocolate volcano, he returned as a powerful monster who can turn things into chocolate by touching it. He was cured by the KND.
Proud Beauty: To the point where it's her most prized quality, taken away when Henrietta fell victim to the curse of the golden caramels of Kandacrunchalan (which require a sacrifice of the trait one is most proud of).
Roaring Rampage of Revenge: When he returns after falling into a chocolate volcano, having been turned into a chocolate monster.
Samus Is a Girl: Heinrich is indeed a girl, originally Henrietta von Marizpan. A cursed set of caramels deprived her of her beauty and transformed her into Heinrich.
Serious Business: Like with Stickybeard, Candy is serious business to Heinrich.
Sweet Tooth: To the extreme. He is not above lying, cheating, or stealing to obtain rare candies.
Terms of Endangerment: Calls Abby "liebchen" (a German term of endearment that means "darling" or "sweetheart") despite them being killer enemies. Turns out to be a holdover from their friendship before the curse.
This Is Unforgivable!: He makes it clear that nothing Numbuh 5 could do for him (even saving his life) would ever make up for what happened in Guatemala. At least, nothing but reversing the curse she was put under there, which she does eventually help him do.
Numbuh Five: Maybe this makes us even for Guatemala?
Heinrich: Not even close! Not even if you saved mein life two thousand times!
Tragic Villain: Heinrich has done a lot of Jerkass things that have only narrowly avoided making him irredeemably cruel but he suffers some truly horrific things and there is a heavy implication that he is addicted to the delicious foods he actively hunts down. "Operation: C.A.R.A.M.E.L. only adds to the tragedy when it's revealed that she used to be friends with Numbuh Five and became an ugly boy because she sacrificed her beauty for cursed caramels.

Nurse Claiborne

https://static.tvtropes.org/pmwiki/pub/images/screen_shot_2021_11_17_at_73722_pm.png

A nurse who worked at Gallagher Elementary School, the same school the Kids Next Door go to. She also has another job as a baker with apple crumbles as her specialty. After Numbuh Two discovered the disgusting secret of her apple crumbles, the school fired her and the bakeries blacklisted her. She later opened the Rainbow Monkey retirement home, where she used the stuffing of old Rainbow Monkeys to create the Rainbow Munchies cereal. Voiced by Jennifer Hale

Battleaxe Nurse: She was once the school nurse at Gallagher Elementary School until she was fired after the Kids Next Door exposed her pinkeye operation, and as a result, she had no success at getting other nursing jobs anywhere in the country.
Evil Chef: She's raised millions of dollars in bake sales with the apple crumbles she makes.
Top-Heavy Guy: Rare female example. She has a large upper body and tiny legs.
Two-Faced: The right side of her face becomes permanently coated in crust after her partner, Joe Balooka shot her in the face with a water balloon infected with pink eye.
Would Hurt a Child: This crazy nurse was insane enough to give kids pink eye so she can harvest their eye crust and use them as apple crumble toppings. And she was more than ready to kill Numbuhs Three and Five to prevent them from telling everyone she was making the Rainbow Munchies cereal from shredded Rainbow Monkey dolls.

King Sandy

A boy who thinks he is a king and usually tries to force Numbuh 3 to marry him, but eventually chooses her sister Mushi instead. Voiced by James Arnold Taylor.

And Now You Must Marry Me: He tries to force Numbuh 3 to marry him twice.
Authority in Name Only: He's not king of anything. Possibly, he and his cousins Cannot Tell Fiction from Reality.
Berserk Button: The very idea of him pretending to do something is this for him.
Sandy: The king does not PRETEND!
Cannot Tell Fiction from Reality: Pretty much the reason why he's a villain is that he doesn't realize he's seen as playing the role of a king as opposed to being an actual one.
Card-Carrying Villain: Double Subverted; he's very villainous in his first appearance, but only because he is obsessive about being "the King." Later on, when he is trying to get revenge for his past defeats, he fully embraces his villainous nature, all the while still professing to be king.
Enfante Terrible: He's about the same age as Mushi and just as bratty as her.
Flunky Boss: In the final level of the online game Rainbow Monkey Rundown, Numbuh 3 fights him alongside two of his minions.
Gender-Blender Name: Sandy is usually a girl's name.
Goofy Buckteeth: Subverted. He is a little kid with buckteeth who believes he is a king and tries to get Number 3 to marry him. While Suki/Number 3 initially doesn't take Sandy seriously and plays along, he flies into a rage when she points out they're just pretending and tries to hurt her and her friends.
Likes Older Women: Until he meets Mushi, he states that he prefers older women.
Love at First Sight: He falls in love with Numbuh 3 and Mushi the instant he meets them.
Power Trio: His three knights/cousins are his powerful minions.
Punny Name: A beach-themed villain named King Sandy.
Puppy Love: He and Mushi are young children who become a couple.
Scarpia Ultimatum: In "Operation: K.A.S.T.L.E.", he coerces Numbuh 3 into marrying him by threatening to dump a bunch of Rainbow Monkeys into a vat of hot nacho cheese.
Toxic Friend Influence: Implied. After he falls in love with and woos Mushi, she starts acting much more selfish and psychotic in subsequent episodes. The fact that he helps her escape her bedroom after the events of "Operation: S.P.A.N.K.E.N.S.T.I.N.E" doesn't really help.
Unholy Matrimony: He and Mushi fall in love and are evil.
Youthful Freckles: He has some, emphasizing that he's even younger than Sector V, who are kids themselves.

James Nixon McGarfield

Former 4th grade president of Gallagher Elementary, who eventually becomes evil after the KND once helped him to the city hall from the Delightful Children and their Father. Voiced by Tom Kenny.

Absurdly Powerful Student Council: Has actual political power, to the extent that he can actually represent kids at City Hall.
Card-Carrying Villain: He points out the fact that he turned evil multiple times and clearly relishes villainy.
Chekhov's Gunman: He first appeared in Operation: R.O.B.B.E.R.S. trying to diffuse the fight between Numbuh 5 and Dixie, only to back out once Dixie shoots his hat off his head while telling Abby she was on her own. He wouldn't have any plot relevance until Operation: P.R.E.S.I.D.E.N.T., almost ten episodes later.
Evil Costume Switch: Initially he wears a white suit but switches to a black one for his Face–Heel Turn.
Evil Redhead: He has curly red hair and becomes a villain.
Face–Heel Turn: Inevi table, isn't it?
Fat Bastard: He's an overweight antagonist.
Fat, Sweaty Southerner in a White Suit: Fits the type to a T, minus the corruption...at least at first.
Forced into Evil: It seemed he was brainwashed at first. Whether that was true or not, it wasn't the case by his second appearance.
Green-Eyed Monster: The reason he turns evil is because he's jealous of Numbuh 1's relationship with Lizzie.
Love Hungry: He is determined to make Lizzie love him, even if it has to be against her will via the use of a boyfriend helmet. After his defeat, he realizes he needs to learn the true meaning of love, and has the chance to do so when he finds out about his assistant Anna's crush on him.
Love Makes You Evil: His unrequited love for Lizzie is why he turns evil. He somehow thought she would be impressed, but she isn't.
"I did this for you! Turned evil for you! Ruled this school with an iron fist so you would like me! Well, forget you! I won't let your stupid feelings get in the way of my plans!"
Loving a Shadow: His infatuation with Lizzie. He turned evil in the mistaken belief that it would make her find him attractive, but on the contrary she just sees him as a despot and bully with bad fashion sense. He doesn't even care if she only "loves" him when brainwashed, so her true personality and free will were never all that important to him. Then there's the Galactic: Kids Next Door teaser video which goes to show just how little he really did know about her.
Meaningful Name: Named after four presidents whose administrations were marred by famous scandals or disasters: James Buchanan, Richard Nixon, William McKinley and James Garfield.
Mistaken for Flirting: His behavior towards his assistant Anna comes off as very flirtatious. He often calls her "my dear" and strokes her chin affectionately. No wonder the poor girl thought her romantic feelings for him were reciprocated and it comes as a total shock to her that she's not the one he wants to make his queen.
Oblivious to Love: He has no idea that his devoted secretary Anna is in love with him until she confesses that it was the reason why she sabotaged his plan to make Lizzie his queen.
President Evil: Well, Student Council President Evil, after his Face–Heel Turn.
President for Life: He makes his intentions to continually hold sway over the school clear by declaring himself Gallagher Elementary's Fourth Grade President For Life.
Screw This, I'm Outta Here: In Operation: R.O.B.B.E.R.S. he tries to act as a mediator during Numbuh 5 and Dixie's duel on the school bus. When Dixie responds by shooting his hat off, he immediately backs down.
They Call Me MISTER Tibbs!: He does not like being called Jimmy and insists on being referred to as Master President.
Took a Level in Badass: He started out as a Lovable Coward type who preferred to handle things peacefully and was quick to avoid violence. By Operation: S.N.O.W.I.N.G. he has become the dreaded Evil Overlord of Gallagher Elementary who easily intimidates other students and deftly wields a mop in a duel with Numbuh 1.

Anna Worthington

The devoted assistant of 4th grade president James Nixon McGarfield who follows him everywhere jotting down notes. Voiced by Anndi McAfee.

Affectionate Nickname: Jimmy calls her "my dear" multiple times, which only serves to further mislead her into believing he is in love with her like she is with him.
Becoming the Mask: Implied to be the case for her as in Operation: P.R.E.S.I.D.E.N.T. she is revealed to be a spy for the Delightful Children. Their plan is to prevent Jimmy from reaching City Hall so none of his positive changes for kids at Gallagher Elementary can happen. As Jimmy himself had not yet pulled his Face–Heel Turn, Anna seems to have been secretly working against him early on. By Operation: S.N.O.W.I.N.G., however, it's clear her loyalty and feelings for him became genuine.
The Dragon: She was Jimmy's secretary even before he turned evil and acts as his right hand.
Evil Chancellor: In her first appearance as, while introduced as Jimmy's trusted advisor, she is secretly working with the Delightful Children who are against him and his plans to make school better for kids. Ultimately subverted in Operation: S.N.O.W.I.N.G. where she is sincerely supportive of Jimmy and even has a crush on him. Possibly his Face–Heel Turn is what made him attractive to her.
Ignored Enamored Underling: The reason she works so tirelessly as Jimmy's assistant is because she is in love with him, but he has no idea.
Love Confession: When Jimmy asks why Anna helped the KND foil his plan to make Lizzie his queen, she tells him it was because she loves him.
Secretary of Evil: She serves as Jimmy's secretary and is eager to help him with his plan to kidnap students and make them attend the assembly where he crowns his queen... at least until she discovers it won't be her.
Woman Scorned: Early on in Operation: S.N.O.W.I.N.G., it's easy to tell that she believes her romantic feelings for Jimmy are reciprocated. When she finds out he is actually in love with Lizzie, her heart is broken and she then decides to help the Kids Next Door foil Jimmy's plans.

Valerie

A school rival of Numbuh 5 and a Were-Poodle. Voiced by Grey DeLisle as Valerie and Dee Bradley Baker as a Were-Poodle.

Academic Alpha Bitch: She takes a lot of pride in being a straight-A honour student and acts antagonistic towards Numbuh 5 simply because she's the only other student who could match her in grades.
I'm a Humanitarian: In her debut episode, she almost tried to eat Numbuh 5, claiming that the student who did a perfect homework assignment is more delicious than the homework assignment itself.
More Despicable Minion: Her boss, Miss Thompson, is revealed to be a Anti-Villain who is seemingly acting out of her were-dog impulses. Valerie, on the other hand, has been shown to outright enjoy being a weredog and even attempt to eat an actual person rather than just their homework.
Our Werewolves Are Different: She's a were-poodle that subsists entirely on homework.

Ernest

A school bully responsible for organizing underground sports events. Tends to clash with Numbuh 4 due to the latter often partaking in said events. Voiced by Dave Wittenberg.

Arch-Enemy: To Numbuh 4, the only KND member that has confronted him.
Barbaric Bully: He locks up innocent parents and then proceeds to feed them with high dosage of caffeine so they turn into literal beasts, all for the sake of money (trading cards, in his case) and entertainment.
Batter Up!: In B.R.E.A.K.U.P., he confronts Wally by dual-wielding baseball bats.
Big Bad Duumvirate: There are implications that he was in cahoots with Soccer Mom in M.A.T.A.D.O.R., or at least that she was taking advantage of his bully fighting events to keep as much children under her power as possible (since their parents were locked up and unable to pick them up from soccer training).
Corrupt Corporate Executive: The events he organizes tend to have ulterior motives behind them, usually for his own benefit.
Gang of Bullies: He leads a small group of bully mooks.

Soccer Mom

A very abusive soccer coach who forces children into long sessions of soccer training.

Big Bad Duumvirate: She directly benefitted from Ernest's bully fighting scheme, although it's left ambiguous if they were truly working together.
Evil Teacher: She's an evil soccer coach.
Kick Chick: She appears to have a very strong kick, which appears to be quite painful when used on Mr. Beatles. Fitting due to her soccer motif.
Muscles Are Meaningless: She's able to kick bowling balls with the same ease as soccer balls, and without hurting her foot in the process.
Prisons Are Gymnasiums: Spends her time in the Arctic Prison lifting a soccer-themed dumbbell.

Robin Food and the Hungry Men

Robin Food, Little Juan, Friar Buck, and various unnamed Hungry Men

https://static.tvtropes.org/pmwiki/pub/images/robinfood.png

A cafeteria worker at an old folks' home who goes out and steals kids' lunches so he doesn't have to cook for the elders himself. The senior citizens are less than grateful for his..."heroic" deeds. Robin Food is voiced by Rob Paulsen, while the Hungry Man known as Little Juan is voiced by Roger Rose.

Authority Equals Asskicking: In his debut episode, he puts up more of a fight by himself than his entire team put together.
Captain Oblivious: Doesn't even react to the senior citizens calling him out for giving them food they have trouble eating. Nor does he react when the Senior Citizen Squad vocally threatens to beat the ever-loving shit out of him for it. That is, until they do.
Card-Carrying Villain: To kids, and boy howdy does it show.
Corrupted Character Copy: While the original Robin Hood genuinely helped people even if he was a criminal, this version of him steals largely because he's too lazy to do his actual job and doesn't care if the people he's supposedly helping have genuine reasons to dislike what he does.
Expy: You don't say?
Laborious Laziness: Robin, here's a question; is all the effort of planning school robberies, archery training, and rehearsing song and dance numbers really less effort than just cooking the old person food you're supposed to?
Lazy Bum: Would rather break into a school cafeteria and steal food from children than cook anything like he is supposed to.
No Celebrities Were Harmed: Little Juan's voice is a clear imitation of Sammy Davis Jr..
Not-So-Well-Intentioned Extremist: At first, it looks like their pillaging of schools to steal kids lunches to give to the elderly is a really nice thing to do, with this goal causing Lizzie to relent from attacking them and break down apologizing. Until Lydia and the Senior Citizen Squad finally get to explain that Robin Food and his Hungry Men are the cafeteria workers at the Sure Would Forest Senior Center, and are stealing kids' food out of laziness so that they don't have to cook anything themselves. In addition, the residents of the retirement home don't even like the food that he brings them and struggle to eat it, with it playing havoc with their dentistry and making them ill, and likely other things.
Lizzie: I don't want you to starve!
Lydia: WOULD YOU JUST TAKE YOUR LUNCH AND GET OUT OF HERE ALREADY?! So we can beat the stuffing out of the guy wearing the tights, thank you very much! Move!
Lizzie: You don't want my lunch?
Lydia: Of course not! Every day this lazy cafeteria worker and his pals are supposed to make us a good old person lunch! But instead he brings us all this munchkin food! What with the peanut butter jelly sandwiches, the salty potato chips! Feh and yuck! Do you know what peanut butter does to my bridgework?
(As she says this, Lizzie glares at a sheepish Robin Food)
Old Man: Just once we'd like some good old-fashioned liverwurst on rye!
Old Woman: Or some nice mushy oatmeal!
(Various residents cheer for oatmeal)
Old Man 2: But he just brings us all this fatty kid stuff! I haven't been able to go to the bathroom in weeks!
Oh, Crap!: When Lizzie catches his staff, his mood deflates rather quickly.
Robin Food: YOOOOO HOOO-!! [Lizzie catches him in mid-air] Oh rubbish.
Robin Hoodlum: A Robin Hood-esque character who steals cafeteria food from kids in a world of evil adults.
Spontaneous Choreography: Has a habit of doing this.
Surprisingly Realistic Outcome: The school food he keeps feeding to the elders messes with their digestive systems, which they happily call him out on. One man mentions that he has been constipated for weeks from the fatty foods.
What the Hell, Hero?: The Senior Citizen Squad chew him out for bringing them and the other elders "fatty kid stuff". Both verbally and physically.

One-Shot and Background Villains

The Great Puttinski

Rupert Puttkin/The Great Puttinski^note

https://static.tvtropes.org/pmwiki/pub/images/puttinski.png

A former champion mini-golfer until his winning streak was broken by Numbuh 2 beating him. Humiliated, he tried to get even with Numbuh 2 by having him shrunk so he could kill him in one last game of mini-golf. The antagonist of Operation: M.I.N.I.-G.O.L.F. Voiced by Rob Paulsen.

Basement-Dweller: He still lives with his mother.
Berserk Button: The one thing that really sets him off is telling him that mini-golf is "just a game" or "kind of dumb".
Demoted to Extra: He only has cameos at villain gatherings after his debut episode.
Did Not Think This Through: He doesn't seem to realize that by shrinking the Earth and putting it into space would kill him too. It would've also destroyed his home golf course which clearly would've upset him, judging by his reaction when he accidentally destroys it anyway.
Disproportionate Retribution: He tries to kill Numbuh 2 and shrink the world so he could use it and the universe as his own mini golf course, just because Hoagie unintentionally ruined his mini-golf championship and dismissed the sport as "kind of dumb".
Insistent Terminology: He goes off on anyone who says "mini-golf", angrily insisting that the correct name is "miniature golf".
Jerkass: Even before he goes insane he hits Numbuh 2 with his golf ball (albeit presumably by accident) and then demands it back without apologizing. He also insults Sector V, calling them "snot nosed kids" and mocks Numbuh 2 for being fat. He also proves very arrogant, calling Numbuh 2 a loser and insisting that if he played against him "one zillion billion" times, he'd beat him every time. In fact, the only reason Numbuh 2 challenged him was to get back at him for his rudeness.
Manchild: Not only is he a Basement-Dweller, he also acts extremely childishly, to the point that actual ten-year-olds come off as more mature than him. Becomes a case of Psychopathic Manchild when he tries to kill Numbuh 2 and shrink the Earth so he can use it as a golf ball and play mini-golf with the universe as his new personal course.
Meaningful Name: A mini-gold player with the last name Puttkin.
Monumental Theft: His mini-golf game held in his house uses real monuments, such as the Sphinx, being shrunk down. This leads to Monumental Damage after Numbuh 2 makes him grow with the size-changing ray, causing him to accidentally wreck most of the course.
Omnicidal Maniac: Yes, really. His Evil Plan is to shrink the entire Earth to the size of a golfball and putt it across the solar system into a black hole before moving on to the rest of the universe, never realizing this would kill himself as well. Numbuh 2 rather aptly says he's nuts.
Serious Business: He takes mini-golf way too seriously, to the point that he feels greatly dishonored by Numbuh 2 costing him his title as a mini-golf champion. And then he goes insane when he hears Numbuh 2 say mini-golf is "kind of dumb".
Shout-Out: His name is a reference to Rupert Pupkin from the film The King of Comedy.
Small Name, Big Ego: Takes great pride in his champion title. His golf ball has his picture on it and he says only true mini golf champions like himself possess it.
Numbuh 5: They have champs in mini golf?
Sore Loser: See Disproportionate Retribution.
Steven Ulysses Perhero: He plays mini-golf and his surname contains "putt".

Mr. B.

https://static.tvtropes.org/pmwiki/pub/images/mrb_3.png

A children's TV executive who looks like a baby, a fact that he's very sensitive about. He takes interest in the KND and their global satellite reach, proposing a whole show for them to star in. His cigar is actually an age-changing device, which he plans to use in conjunction with the KND's satellite web to transform the whole world into actual babies. The antagonist of Operation: C.A.B.L.E.-T.V.:

Bald of Evil: Justified since his body is stuck in an infant age.
Cigar Chomper: To complement his executive look. In truth, it's actually an age-changing device.
Corrupt Corporate Executive: Plans to turn the whole world population into babies because he is that sensitive about his own appearance and wants everybody to stop talking about it.
Executive Meddling: An in-universe example. While filming for the KND TV show, he quickly distorts Sector V's image into something that's completely at odds with what they claim to fight for.
Fountain of Youth: His age-changing cigar can both age people up or down, although his plans specifically have no use for the age up aspect. When the Delightful Children obtain it, though...
Hoist by His Own Petard: Gets foiled by his own age-changing satellite beam.
Insistent Terminology: "I AM NOT A BABY!!!"
Kill Sat: His plan involves hijacking the KND's satellites to fire a age-changing beam from space down into Earth.
Older Than They Look: It's very clear that he is mentally an adult, but still walks around in diapers that require constant changing.
Psychopathic Manchild: He is a literal man child given his appearance. Even despite that, though, he still has his assistants change his diaper like they'd be changing a babies diaper rather than change it himself, he is prone to temper tantrums just like a real baby, especially when you call him or compare him to a baby, and it's implied his idea of what kids would like, which are also implied to be things he finds entertaining, are actually things babies would like (as Number 2 tells him his channel is "for babies")
Raise Him Right This Time: After Mr. B gets hit by his own age-changing satellite beam and regresses mentally to an infant, his parents/assistants claim that they will make sure their son grows up into a friendlier person.
Small Role, Big Impact: He is merely an one-off villain, but his age-changing cigar turns out to be a important plot element in the season finale.
Vocal Dissonance: Despite looking like a baby, he has a very hoarse, gravelly voice.

Mrs. Goodwall

The elderly proprietor of the Kid Zoo, a zoo that literally holds captive children as exhibits.

Ambiguously Human: She has a clear bovine tail jutting out from her back, but its nature is never actually brought up or relevant to anything in the story.
Evil Old Folks: Supposedly, she's in her 80's.
Horned Hairdo: Shaped like a pair of horns.
People Zoo: She captures children to display them for the adults' amusement, since she believes kids to be too wild to be kept at home.
Tranquilizer Dart: What she uses to capture children.

Mr. Mogul and Simon

https://static.tvtropes.org/pmwiki/pub/images/mrmogulsimon.png

Mr. Mogul is the head of the Rainbow Monkey Corporation, the company that makes the Rainbow Monkey toys. Simon is Mr. Mogul's assistant. They once tried to manipulate Numbuh 3 into helping them find the real Rainbow Monkeys. Mr. Mogul is voiced by Rob Paulsen (except for "Operation: M.O.V.I.E.", where he is voiced by Dee Bradley Baker), while Simon is voiced by Tom Kane.

Astonishingly Appropriate Appearance: Mr. Mogul sort of looks like if a Rainbow Monkey toy transformed into a human man. Minus the rainbow dealie on its head.
Bald of Evil: Mr. Mogul has no hair, and he certainly doesn't have a heart.
Corrupt Corporate Executive: Mr. Mogul is in charge of the Rainbow Monkey Corporation and had no trouble at all in manipulating a young girl into essentially helping him poach real Rainbow Monkeys as well as doing away with her when she became wise to his true intentions.
Fat Bastard: Mr. Mogul is overweight and not all that nice.
Fat and Skinny: Mr. Mogul is overweight while Simon is skinny.
Lean and Mean: Simon is very thin and just as much a Jerkass as Mr. Mogul.
Would Hurt a Child: Whatever he intended to do to the Rainbow Monkeys after he captured them, he had no qualms with doing to Numbuh 3 to ensure she didn't squeal on him.
The Unreveal: Whenever he explains what he intends to do with the Rainbow Monkeys, he only tells it in an unintelligible whisper, though it's strongly implied he intends to kill them and use their bodies to make toys.

Shark Family

A family consisting of three great white sharks: a father (Gill), an unnamed mother and a son (Bruce). Due to it being Bruce's birthday, they decide to venture out on land to grab a bite for their son at Chester's Burger Frenzy.

Abusive Parents: Gill frequently complains and even yells at Bruce for all the trouble his birthday request ends up bringing.
A Birthday, Not a Break: "Oh, 'Happy Birthday', Bruce! Now we're being attacked!"
Civilized Animal: They are sharks who can drive, order fast food and argue like a human family, but still live at sea like actual sharks.
Dysfunctional Family: A surprisingly realistic example despite being cartoon sharks.
Threatening Shark: They go out on land precisely to order from a place that serves "kid meals".
Unusually Uninteresting Sight: No one actually questions the plausibility of minivan-driving sharks. Numbuh 4 does think they're a cool enough sight to bring attention to, but it's still a hilarious underreaction.

Cheese Shogun Roquefort

Shogun Roquefort

https://static.tvtropes.org/pmwiki/pub/images/cheeseshogun.png

A Cheese Shogun who believes cheese to be more valuable than gold. Voiced by Kevin Michael Richardson.

Actually Pretty Funny: He admits to Numbuh Four that Numbuh Two's false Face–Heel Turn was funny.
Back for the Finale: He's one of the few villains who doesn't show up after his debut, not even a cameo at villain gatherings even though his Cheese Ninjas frequently appear with them. He finally makes a brief reappearance in "Operation: I.N.T.E.R.V.I.E.W.S." taking part in the scavenger hunt.
Cloud Cuckoo Lander: He's under the delusion that cheese is more precious than any other valuables in the world, and opts to hoard it all instead of eating it.
Cool Helmet: A cool samurai helmet with the emblem of a cheese wheel with two knives in it.
Elite Mooks: He has an army of Cheese Ninjas. With their cheese based weaponry, super speed, and martial arts skills, they are among the most formidable villains in the series.
Evil Sounds Deep: Like a lot of Kevin Michael Richardson's roles, he's a villain with a deep voice.
Fat Bastard: He's a villain who happens to be obese.
Forgot to Mind Their Head: Hoagie spins Wallabee a tale of how he and the shogun did battle. Wallabee eventually deduces:
Numbuh 4: He hit his head on the ceiling when he jumped in the air, didn't he?
Screw This, I'm Outta Here: In "Operation: I.N.T.E.R.V.I.E.W.S.", he leaves the scavenger hunt when informed that it's likely the Delightful Children's birthday cake isn't cheesecake.

Mr. White

A living pair of briefs who is actually a professional assassin. He is sent by the Delightful Children from Down the Lane to kill Numbuh 1 in his sleep, disguised as a gift.

Anti-Villain: His distaste for kids comes from the way they treat underwear without any sort of care. When he finds out Numbuh 1 is unlike other kids in this regard, he stops trying to kill him and even saves his life.
Because You Were Nice to Me: Mr. White has a change of heart when he learns that unlike most kids, Numbuh 1 folds his underwear. Not only does he save Numbuh 1's life (and promise to keep his laundry habit a secret), but he goes the extra mile to have a couple of buddies take care of the DCFDTL.
Cassandra Truth: It's not easy for Numbuh 1 to convince the rest of Sector V that the underwear he was sent is trying to kill him.
Hired Guns: Works for The DCFDL, although after his Heel–Face Turn, he decides to send his own friends (a pair of socks) after them.
Humans Are Bastards: Mr. White's opinions on kids. Specifically, kids who don't fold their underwear and just dump them down the laundry chute like trash, according to Mr. White.
Living Clothes: A talking, fighting pair of briefs.
Pint-Sized Powerhouse: Even if he's somewhat oversized for an underwear, he's still just about half of Numbuh 1's height.
Professional Killer: Refers to himself as a "professional pair of underpants", and is described as an assassin by Numbuh 65.3.

Margie

Margie/Madame Margaret

https://static.tvtropes.org/pmwiki/pub/images/madamemargaret.png

The principal of St. Rita's Preparatory School, who attempts to turn all the boys on the planet into girls. Voiced by Candi Milo.

Badass Cape: Her future self wears a cape.
Does Not Like Men: Her hatred of the male gender is greater and more destructive than even that of Numbuh 86.
Evil Counterpart: She serves as one to Numbuh 86. Both hate boys with a passion, but Numbuh 86, for all her faults, is willing to do the right thing and, being a Kids Next Door operative, is willing to defend all kids, boys or otherwise. Margie on the other hand, is content to wipe all boys out, no matter how heroic they are.
Evil Is Petty: Her entire reason for wanting to wipe boys off the face of the planet is never outright explained, but loosely implied to be because she really hates her "gross" brothers, taking this into a family-friendly genocidal/gendercidal Disproportionate Retribution.
Eye Glasses: Her younger self, her adult self (which turns out to be a robotic suit), and her future self has these.
Make Wrong What Once Went Right: Margie somehow managed to establish a Stable Time Loop of her future self using a time machine to send back Girlifier Rays and soldiers so that her present self can start the takeover of the world. How the loop began isn't explained, and strangely enough, the present Margaret also had a time machine — the things from the future only disappear once both machines are destroyed.
Massive Numbered Siblings: She mentions having several brothers. It's more or less her Freudian Excuse for wanting to get rid of boys.
Mobile-Suit Human: Piloted by her younger self, in which the lower half is a walker. It's also hinted that she's paraplegic. However, her future self seems perfectly capable of walking on her own.
Omnicidal Maniac: Her plot to rid the world of boys is ultimately fatal, as it would prevent the creation of future generations of humans. Had it not been for Future Numbuh 4, humanity would have been doomed to a slow, painful extinction a la 12 Monkeys.
Pink Means Feminine: She wears a pink dress.

Chef Pierre

A French chef who was once hired by Father to create a giant ice cream cake for the Delightful Children. He only appears in "Operation: C.A.K.E.D.-F.I.V.E." Voiced by Jess Harnell.

Evil Chef: He's a French chef in league with Father.
French Jerk: He's French and he's not very polite.
Gag Nose: His nose is big and silly-looking.
What Happened to the Mouse?: He just disappears from the plot after Numbuh 3 tells him he's not invited to the Cell Block party.

Black John Licorice

Captain Black John Licorice

A candy pirate who once tried to steal a bunch of licorice trees from an island off the coast of North Dakota. A curse ended up befalling him and his crew, which caused the licorice to turn from red to black and the pirates to all become black licorice skeletons who only come alive at night. Voiced by Marc Graue.

Dem Bones: Because of the licorice curse, he's now an undead skeleton made of black licorice.
Eviler than Thou: Stickybeard is Affably Evil and willing to cooperate with his own enemies if it means a better outcome for everyone overall. Black John Licorice attempts to outright kill Heinrich to lift his crew's curse and straight up lacks the morals that make Stickybeard a half-decent person.
Expy: He's an obvious parody of Captain Hector Barbossa from the Pirates of the Caribbean film series. In fact, Mr. Warburton initially wanted Geoffrey Rush to voice Black John but it turned out to be too expensive to hire him.
Near-Villain Victory: He almost succeeded in growing the licorice tree seed and lifting the curse he and his crew suffered while the seed was still inside Heinrich Von Marzipan, but Stickybeard's pirates kicked the seed out of Heinrich at the last minute.
The Unfettered: According to Stickybeard, he'd stoop to any low to get candy, including steal it from his own mother.
Villain Ball: Was so greedy that when he found an island with naturally-occurring licorice trees, he completely deforested it just so that no one else could have any rather than leave some of it alone so he could harvest more candy from it later.
"The Villain Sucks" Song: Stickybeard and his crew sing about Black John and the curse his crew suffered in a song called "Licorice, Licorice".
Would Hurt a Child: He didn't care at all that Heinrich Von Marzipan could get killed by having the licorice tree grow while the seed was still in his stomach. He's also implied to have been particularly cruel to a young Stickybeard, back when the pirate was just John's cabin boy.

Senator Safely

A senator overly concerned about children getting hurt who tries to set things right by creating an army of Safety Bots in "Operation: S.A.F.E.T.Y." Voiced by Dave Wittenberg.

Anti-Villain: Make no mistake, building an army of giant robots to make children safe whether they want to be or not is rarely a sane thing to do, but Safely's still in the right as far as his intentions go.
Cut Lex Luthor a Check: With the insane budget that Congress gave him, he could have put that towards more... sane methods of safety or even children's healthcare and first aid services. Instead, he made giant robots.
Even Evil Has Standards: Downplayed and mocked. He's all for the Safety Bot's insane and over the top methods of keeping children safe...up until the moment they start inconveniencing adults while doing so. Numbah 4 is annoyed, but not particularly surprised to hear it.
Expy: He's a clear pastiche of the X-Men villains Senator Kelly and Bolivar Trask. Like the former, he's a senator with a misguided agenda toward doing the right thing. Like the latter, he builds an army of giant robots to eliminate what he views as a threat, while the Safety Bots are a blatant homage to Trask's Sentinels.
Lawful Stupid: Even when he does an Enemy Mine with Number Two and Number Four, his obsession with child safety means refuses to let them have any weapons, even ones that could take down the Safety Bots.
Placebo Eureka Moment: It takes him a second to realize that while trying to get him out of the way, congress gave him an insanely huge budget for his cause.
Think of the Children!: It's not that he's the only senator who is trying to pass a law concerning children. Its just that he's the only senator whose trying to pass a law to 'help' children, rather than the rest of them who are desperate to be the ones who get to pass ones that 'hurt' them.
Token Good Teammate: An odd example as he's the only Senator who gives a damn about the well-being of children since his fellow Senators are all child-haters... but even then, his policies make children more miserable than safe.
Well-Intentioned Extremist: He only made the Safety Bots out of a misguided attempt at ensuring children stopped getting hurt, especially since Congress is too busy trying to find new ways to oppress children for no discernible reason.

The Rowdy Hooligans From Across The Square

Tennis Boy, Guard Girl, and The Brute

https://static.tvtropes.org/pmwiki/pub/images/rowdyhooligans.png

Three British children who work for Father and are the enemies of Sector E. Voiced by Tom Kenny, Jennifer Hale and Frank Welker.

Affably Evil: They may be working for Father, but they're so darn friendly to the point of hanging out with their enemies when not working.
Catchphrase: The boy with the blue scarf: "Wink wink, nudge nudge, say no more."
Foil: To the Delightful Children From Down the Lane. The Delightfuls act as one single-minded entity, are openly hostile to other children and are deadly enemies with Sector V. The Rowdy Hooligans are three distinct persons who, while loyal to Father, get along quite well with Sector E and act friendly enough to Numbuh One that he mistakes them for Kids Next Door operatives.
Friendly Enemy: While they work for Father, they are friendly enough with Sector E to have a drink with them after their mission.
No Name Given: We never hear their real names.
Punch-Clock Villain: They're well acquainted enough with Sector E that both teams go out for drinks when not working.
The Unintelligible: The one girl has an extremely thick accent that's hard to discern.

Potty Mouth

A toilet-themed villain with foul language. Voiced by Maurice LaMarche.

Always Someone Better: He mainly exists to make the Toiletnator look like even more of a loser by being a toilet-based villain who isn't an incompetent dunderhead.
Big, Stupid Doodoo-Head: His theme is profanity, but in practice he mainly just uses puerile insults like "doodyhead".
Catchphrase: He often begins sentences with "You're poopin' right..."
Early-Bird Cameo: He first appeared as a background character in "Operation: M.O.V.I.E." before finally making a full appearance in "Operation: A.W.A.R.D.S."
Non-Human Head: He apparently has a toilet for a head.
Sir Swears-a-Lot: Parodied. Profanity is his theme, but he doesn't actually swear. Robin Food has to stop his rant because it's a family show (whether he was referring to the award show or acknowledging the Cartoon Network censors is up for debate).
Potty Mouth: Oh, go flush yourself down a pee-pee hole, you toilet paper covered doodyhead!
Uncertain Doom: In "Operation: I.N.T.E.R.V.I.E.W.S.", he and Knightbrace are last seen at the mercy of a Queen Tie. It's not clear whether the Queen Tie killed them or simply turned them into accountants.

Dodgeball Wizard

A wizard who has power over dodgeballs and has set out to prove adults rule the dodgeball court. Voiced by Dave Wittenberg.

Evil Old Folks: At the very least he's in his 80s. While his goal to prove adults are the best at dodgeball is relatively harmless, he was willing to kill Joey in their game.
Evil Is Petty: The man has spent 64 years of his life all in the pursuit of proving that he is the best dodgeball player in the world, and that an adult can be better than a kid at the sport. He does a victory dance when he thought he beat a toddler. Even by the standards of this series, that is exceptionally narrow-minded.
Gag Nose: His ultimate undoing.
I Want My Mommy!: Threatens to tell his mom that Joey broke his nose. Given how elderly he already is, it's a wonder that she's still alive.
Laughably Evil: His insane motive combined with his over-the-top personality make him a humorous villain to watch.
No Indoor Voice: Practically everything he says is in a loud tone.
Psychopathic Manchild: Spending 64 years to beat a bunch of kids in a schoolyard activity and doing a victory dance after thinking he killed a toddler is not exactly mature. The fact that he runs to tell his mom rather than seek medical treatment after Joey breaks his nose shows just how childish the man really is. It's even detectable in his speech patterns, as he uses the phrase "unpossible," which is only used by the children on the show.
Sinister Schnoz: He's got a long nose and he's evil. It's also his weak spot as Joey breaks his nose.
Would Hurt a Child: His first scene is him clobbering several kids with dodgeballs to be the champion and his first concern when it seems like he killed Joey with a colossal dodgeball was to celebrate his supposed victory.

The Steve

The apparent leader of the Teen Ninjas, and possibly all teenagers in the world.

Cool Shades: To complement his general "teen rebel" look.
Fallen Hero: Possibly, as he bears a resemblance to the former Numbuh 100.
Loud of War: Employs some extreme heavy metal music (seemingly developed by "science nerds") to bombard the hearing of the KND's agents and incapacitate them.
Non-Action Big Bad: Despite being the Teen Ninja leader, he doesn't really do any fighting in his one single appearance, although he was at least ready to lay the smack on Numbuh 1 before Chad interrupted.
Obfuscating Stupidity: The initial impression is that he seems completely clueless about what's going on around him, but later on, it's shown he knows exactly what he is doing.
Spell My Name with a "The": Not Steve, The Steve.

Other

KND Splinter Cell (MASSIVE SPOILERS!)

A traitorous shadow group within the Kids Next Door Organization who intend to destroy all adults on Earth, good or bad, and is unknown to Supreme Leader Numbuh 362 or most KND operatives.

Big Creepy-Crawlies: When they're seen on-screen, they mostly piloted giant caterpillar-like mobiles.
Renegade Splinter Faction: It's in their name, being a rogue faction that is out to kill all adults rather than evil ones. Then this gets subverted, as they're true members of the GKND operating as a "splinter cell" to draw suspicion off their true goals.
Walking Spoiler: It's hard to talk about their true purpose for the entirety of the Galactic Kids Next Door.

Characters / KND: Minor Villains

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