YMMV: The Adventures of Jimmy Neutron: Boy Genius

  • Adaptation Displacement: While The Movie was very popular, and still pops up on Nick every now and again, people often forget about it or think that it came after the show.
  • Alternative Character Interpretation: Jimmy's dad; is he really a bumbling idiot, or does he just like causing destruction by abusing Jimmy's technology
  • Critical Research Failure: Happens all the time, surprisingly. Jimmy has:
    • Stated that Australia isn't a continent (it is).
    • Called the Cretaceous period the Cretaceous era (the terms aren't interchangeable [even though people do use those words interchangeable], and it was the wrong period to begin with).
    • Said that Thomas Edison invented electricity (electricity existed beforehand; Edison was one of many to do experiments with it).
    • Stated that Chinese ginseng is a muscle relaxant (it isn't).
    • Said that as a hamster, he is high in HDL (high-density lipoprotein) cholesterol, which is bad (shouldn't that be low-density lipoprotein [LDL] cholesterol?).
    • And explained that a person can never change because their personality is imprinted on their brain at birth (safe to say, it's not).
      • Though, that Jimmy was wrong on that last one was kind of the point of that episode.
  • Designated Hero: Jimmy isn't an abrasive character, but he does cause many of the problems he has to fix. Cindy herself lampshades it.
  • Ensemble Darkhorse:
    • Hugh Neutron, mainly for his strange behavior and obsession with pie.
    • Bolbi is also this, due to his memetic "Slap Slap Slap, Clap Clap Clap" dance.
    • Sheen was this in the original movie but, given his own spinoff and more Flanderization, he's grown more into The Scrappy.
    • If we're counting his inventions, then Jimmy's Hypno Beam/Ray. Yes, that Hypno Ray. People love to make fanart and fanfiction of what they could do with that thing.
  • Evil Is Sexy: Invoked and parodied with Beautiful Gorgeous.
  • Fountain of Memes: Hugh Neutron has an internet following based on this.
  • Growing the Beard: More of like Braiding the Hair; episodes after "Beach Party Mummy" tend to stand out more, shedding the spin-off-of-the-movie feel. In that particular episode Libby has decided to keep her hair braided, making her stand out more as well.
  • Heartwarming Moments: When Cindy admits she loves Jimmy just before she fades to a near-death point in The N-Men, or tries to as all she says is "luh...luh...luh..." and then collapses with Jimmy picking her up and asking, "Cindy what? Like? Loathe? Love?" and then setting her down on the ground as he begins to calm down. A tear-jerking moment...
  • At the end of "Time is Money," Jimmy goes back in time to make sure Hugh doesn't invest his fifty dollars with Mc Spanky. After he comes back, Jimmy asks Hugh what he did end up spending the money on. Hugh's response?
    Hugh: Well, son...I spent it on your mother's wedding ring.
    Judy: (shows off the ring) And it was all the money your father had in his name!
  • "Funny Aneurysm" Moment/Hilarious in Hindsight: In Retroville 9 Jimmy creates high-tech baseball gloves and automatic homerun hitting bats neutronized with the skills of three baseball players for his struggling baseball team. They effectively cheat their way to the little-league finals in Japan. The players Jimmy used were Barry Bonds (an alleged cheater), Mark McGwire (a confessed cheater) and Babe Ruth (dead).
  • Memetic Mutation: Why helo it is i jimbles notronbo.
  • One-Episode Wonder: When Pants Attack for...well, what do YOU think?
  • The Scrappy:
    • Carl Weezer. Primarily because he came off really, really annoying with his Squicky interests in Judy Neutron and his constant complaints about his scapula. It didn't help his character Took a Level in Jerkass later on.
    • Sam. While he was already a Jerkass when the show started, The N Men showed his asshole status when he sends the kids (minus Jimmy) to Area 52 due to their carelessness. While Jerkass Has a Point stands here, his behavior isn't necessary. It comes even more to an annoyance when Sheen came to him for help in order to get a main component to make Carl burp against Hulk-Jimmy (It Makes Sense in Context), but Sam rudely says no, all while calling Sheen a 'freak', prompting Sheen to just take it and have Sam complain that he owes him a $1.80 for it. And even after thanking him at the end of Jimmy's speech, he's still complaining about the $1.80.
    • Miss Fowl to some due to her treatment to Sheen (at least before Planet Sheen)...
  • Shipping: Yes, even in a show where most main characters are age 10 to 13.
  • Suspiciously Similar Song: The title card for "Hypno-Birthday to You" has a copyright-friendly variation of The Beatles' "Birthday" playing over it.
  • Tear Jerker: The scene in "Brobot" where Jimmy tries to deactivate Brobot. When he explains to Brobot what he's doing, Brobot (who, for once, doesn't sound happy or excited at all) says, "But...but then we can't play anymore. And you're my...big brother." Jimmy starts feeling guilty, and sheds a single tear...which lands in Brobot's circuitry and seems to short him out, causing Jimmy to feel even more guilty. It turns out that Brobot's indestructible, and all the tear did was tickle him, but still.
    • During "Return of the Nanobots," Hugh ends up believing he's the last person on Earth due to everyone else being deleted by the nanobots. When he realizes that he's alone, Hugh laments the loss of Jimmy and his wife (whom he actually calls by her first name, Judy).
  • They Copied It, So It Sucks: Was accused of doing this to Dexter's Laboratory in its early days, though luckily it developed its own identity by evolving into an adventure show with a slightly larger central cast and a better attempt at Character Development.
  • They Wasted a Perfectly Good Plot: For Jimmy/Timmy Power Hour 3, which was originally was supposed to be a Grand Finale for both shows. Who didn't want to see a 3D Dimmsdale and a 2D Retroville, Crocker spazzing out in 3D or the alien Mark Chang in 3D? And better yet, send the Gigglepies to Retroville and the Twonkies to Dimmsdale (we wonder if Timmy has learned from the Gigglepie experience?).
  • Uncanny Valley: Some consider the CGI this. Others think the CGI has aged very well.
  • Vindicated by History: When it first aired, many slammed the show for being too similar to Dexter's Laboratory, and the humor being So Okay, It's Average. However, since being off the air for several years now and a certain infamous fan animation reminding people of the series, people have since rediscovered it and given it a second chance, and got to see how the later seasons grew the beard in comparison to how it started. Nowadays, it's often hailed as one of the, if not the, last great Nicktoons on Nickelodeon.

Alternative Title(s):

The Adventures Of Jimmy Neutron