History YMMV / CodenameKidsNextDoor

* {{Moe}}: Numbuh 84 and 83 are BadassAdorable and are much nicer than their BrattyHalfPint leader Numbuh 383.

* AssPull: The idea that Chad Dickson [[spoiler:was a double agent and was helping Sector V throughout all their missions. While his sudden incompetence and telling Cree not to send the Moon base to the sun after he did the same thing do [[{{Foreshadowing}} foreshadow]] his true allegiance, in other episodes that featured him prominently, it's clear that he was evil and that his defeats weren't due to any self-sabotage on his part, with the only hand wave for this being that his resentment of Nigel always brought him to blows with Sector V and distracted him from fulfilling his sabotage missions for the Galactic KND.]]

* AssPull: The idea that Chad Dickson [[spoiler:was a double agent and was helping Sector V throughout all their missions. While his sudden incompetence and telling Cree not to send the Moon base to the sun after he did the same thing do [[{{Foreshadowing}} foreshadow]] his true allegiance, even in episodes that featured him prominently, it's clear that he was evil and that his defeats weren't due to any self-sabotage on his part.]]

** It's nearly impossible to not think of Count Spankulot as some sort of deviant child predator considering his modus operandi of invading homes at night to spank naughty children, to the point that the character was clearly reworked after his debut since that aspect ended up becoming too big to ignore.

* EvilIsSexy: Cree Lincoln. It's no wonder why Numbuh 2 has a crush on her.

* FanonDiscontinuity: A number of fans choose to view the TV Movie ''[[WesternAnimation/OperationZERO Operation Z.E.R.O.]]'' as the SeriesFinale while ignoring Season Six. This camp finds ''Operation: Z.E.R.O'' offered a more satisfying and thematically appropriate finale compared to what ''[[GrandFinale Operation: I.N.T.E.R.V.I.E.W.S]]'' provided.

** The show is extremely popular in Mexico and Latin America, thanks to it’s SugarWiki/SuperlativeDubbing (Such as Óscar Flores as Numbuh 1 for example) and {{Woolseyism}} (Such as references to the Latam dubbing industry and Numbuh 1’s DubNameChange from Nigel to Miguel, which doubles as a reference to Mexican singer, Luis Miguel.)

** The show is extremely popular in Mexico and Latin America, thanks to it’s SugarWiki/SuperlativeDubbing (Such as Óscar Flores as Numbuh 1 for example) and Woolseyism (Such as references to the Latam dubbing industry and Numbuh 1’s DubNameChange from Nigel to Miguel, which doubles as a reference to Mexican singer, Luis Miguel.)

** The show is extremely popular in Mexico and Latin America, thanks to it’s SuperlativeDubbing (Such as Óscar Flores as Numbuh 1 for example) and Woolseyism (Such as references to the Latam dubbing industry and Numbuh 1’s DubNameChange from Nigel to Miguel, which doubles as a reference to Mexican singer, Luis Miguel.)

** Nigel and Chad's relationship can come off as oddly sexually tense in "Operation: T.R.E.A.T.Y." Reminder that they spend most of the episode literally chained to each other.

** Numbuh 19th Century tends to get ignored or PutOnABus so people can pair Numbuh 86 with their favored character (generally Numbuh 60).

** [[https://www.youtube.com/watch?v=l_mSBwWcdW0 An old CN advert promoting the NBA]] features Sector V trying to block [=LeBron=] James. [[Film/SpaceJamANewLegacy This wouldn't be the last time Warner Bros. would feature LeBron and cartoons in a basketball game]].

** The titular lice is "Operation: L.I.C.E."--they eat hair and sport some rather impressive fangs, but the bugs are rather adorable. ''Especially'' the baby lice seen on Numbuh Two near the end.

* ContinuityLockout:

* ValuesDissonance: Given how the attitudes towards corporal punishment have changed over the years, it's unlikely that a character like Count Spankulot would ever be thought of had the show been produced today.

** Some characters like the truck driver from Operation: P.I.A.N.O. are sometimes included into villain team shots despite being just people doing their jobs.

** Poor, poor Lizzie tends to get all sorts of shit flung into her face from fans that prefer pairing Numbuh One with anyone but her, particularly Numbuhs Five and 362.

** Numbuh 60 only has a few sporadic appearances throughout the series, with his role in T.R.A.I.N.I.N.G. being his biggest (and he was mostly absent anyway). Still, he's easily the most popular of the "minor" KND agents and appears frequently in fan works.

** Numbuh 23 (Virginia)×35 (Bartie) is a notable example since they're just a pair of minor agents who happened to be prominently shown together in Operation S.L.U.M.B.E.R. and a few background scenes (and 35 actually saves 23 at one point). The Fan-Preferred part mostly comes from the ship's relative popularity compared to both of the characters' actual importance in the show.

** The scene from the episode C.A.K.E.D F.I.V.E where [[spoiler: the orbital station was destroyed by starship in the atmosphere]], became a mirror to the signature scene from Film/RogueOne where[[spoiler: a Hammerhead Frigate [[RammingAlwaysWorks rammed]] into two Star Destroyers to destroy the force field generator at the orbit]].
** In F.L.U.S.H., Toiletnator mistakes the other villains as Sector V disguised as them and thinks Knightbrace is Numbuh 4. In A.W.A.R.D.S. Numbuh 4 does disguise as Knightbrace.
** The premise of L.O.C.K.D.O.W.N. (in which there is a a hidden monstrous intruder hunting down Sector V one by one[[note]]by spanking them[[/note]]) is eerily similar to that of ''VideoGame/AmongUs''. [[https://c00lac0la.tumblr.com/post/650348086775939072/op-lockdown-is-a-great-ep The similarities have not been lost to fans.]]

** L.I.C.E. has Numbuh 1 be asked what to do, to which he responds "Follow my lead – RUNNNNNNN!" Years later, Creator/BenDiskin would be voicing [[Manga/JoJosBizarreAdventureBattleTendency another character]] (with a very similar voice even!) who was asked this question, and gave [[https://youtu.be/7GaJUmefY1I a very similar response]].

** Nigel and Chad's relationship can come off as oddly sexually tense in T.R.E.A.T.Y. Reminder that they spend most of the episode literally chained to each other.

** [[spoiler: Chad]] following the reveal that [[spoiler: his betrayal of the KND was [[FakeDefector a ruse]]]]. On one hand, he's still an incredibly egotistical and bitter person, to the point that he [[spoiler: tries to kill Nigel in Operation T.R.E.A.T.Y.]] However, it's easy to feel some degree of sympathy for him given [[spoiler: the fact that he willingly sacrificed his own reputation and friendships within the KND; for the sake of his mission.]]

** Chester crossing the MEH a standout among the rouges of the KND by being one of the few whose initial scheme is based in reality. In this case, a child labor camp; brainwashing children into making camp Knickknacks. If that didn't do it? Attempting to drown a baby skunk certainly did.

* UnintentionallySympathetic: We're supposed to see Numbuh 4 as a brat in "Operation: H.U.G.S." for not wanting to be at a Rainbow Monkey amusement park. The thing is that Numbuh 3 knows fully well about his dislike of Rainbow Monkeys, yet she drags him against his will to the park, making her come off as selfish. And while it was rude and dumb of Numbuh 4 to make fun of the brand in front of the fans, he does it out of frustration over being taken to the park without having a say in it.

* ToyShip: ''Several''. In the main team alone; 3+4 didn't so much have subtext as it was just plain text from the start, 2+5 was a slightly more debatable case, and 1+5 had some good chemistry. But let's not get into the ''web'' that the fans ([[ShipTease and creators]]) have spun.

** [[BattleCouple Numbuh One×Numbuh Five]] and Numbuh One×Numbuh 362 were both more popular than the official Numbuh One×Lizzie. The former for their great leader/second-in-command dynamic and emotional scenes and the latter for their more frequent interactions in later seasons and clear unrequited feelings from Rachel.

* DiagnosedByTheAudience:
** Numbuh 1's exceptionally paranoid and exhibits obsessive behavior, bordering on signs of Paranoid Personality Disorder or Schizophrenia.
** Given that Numbuh 4 is shown to be borderline illiterate at times, yet the finale reveals that he grows up to become a doctor of all things, some fans have wondered if he actually suffers from an undiagnosed learning disability.

** Numbuh 1's exceptionally paranoid and exhibits obsessive behavior, bordering on signs of mental illness.