- Audience-Alienating Premise: Each film takes the story of diaper-clad heroes and manages to make it more and more unwatchable with every new effort.
- Bile Fascination: This is the kind of bad movie you have to see to believe.
- Esoteric Happy Ending: A comparatively benign example but still present. Presuming the "Kinder Method" does result in the children proving more intelligent as they grow older and their early education by BabyCo begins to manifest, then in about five years Sly will start to prove himself demonstrably smarter than Whit, vindicating everything Elena has done. The Info Dump in the opening scenes even states this is exactly what will happen.
- Fridge Logic: Why, exactly, does BabyCo need a secret lab beneath the city? Aside from the obvious question of how a child care company has the resources to make such a thing, from what we see they aren't doing anything illegal. Their testing methods appear to amount to monitoring the kids in controlled environments, using computers to analyze what they do at play in greater depth, and keeping them isolated from the outside world, all in order to prove their methods of educating the babies during their early years eventually produces children of demonstratably superior intelligence. There's no reason they couldn't just use the children of company employees and ask them to live at the office to keep the kids contained. Why is this some sort of secret conspiracy?
- Idiot Plot: Bigtime. For starters, a two-year-old is able to escape a secret underground lab by building some sort of gun that jams electronic devices, made from toys the lab provided him, and no one is able to detect his escape. In fact, BabyCo in general employs some of the dumbest people on the planet that they are continually outsmarted by babies.
- Narm: The movies are loaded with this, of the worst degree you can imagine.
- Nightmare Fuel: The animatronic mascots. Including a Monster Clown with a tray of wind-up dentures, and a monstrous giant shaped like a baby, with the voice of Satan himself. That's to say nothing of how the first film's shoddy attempts to composite a toddler's head over the face of their stunt doubles. Even the way their mouths move is unnerving.
- Retroactive Recognition: Justin Chatwin in Baby Geniuses 2.
- Snark Bait: Well, why the hell else would you watch this tripe?
- Sequelitis: The second film performed worse than the first both critically and financially, and is considered one of the worst movies ever made. To add insult to injury, the direct-to-video series has continued in spite of the poor reputation of both films.
- Special Effect Failure:
- The special effects for the films are terrible. First, there's the method of making the babies' antics look convincing, by poorly Photoshopping baby faces over the bodies of little people (especially obvious during the dance scene), in addition to the disturbing Synchro-Vox-esque process used to superimpose CGI lipsync onto the babies faces. Also, one scene in which Sly backflips several times in front of the parents of his identical twin brother, you can easily tell it's a little person stuntman because of the height difference.
- In Baby Geniuses 2 in particular, Kahuna has some stunts where it's very obvious he's on a wire and/or replaced with a stunt double.
- Spiritual Adaptation: The films can be considered a somewhat the closest thing to a live-action adaptation of Rugrats, as both the films and cartoon simply featured talking babies.
- Squick: Bill Biscane of the sequel is revealed to be the MUCH older brother of the forever young Kahuna. It Makes Just As Much Sense In Context.
- Surprisingly Improved Sequel: As bad as the second film is, it at least features a pretty imaginative story and you can see how someone might think it was a good idea. Unfortunately, the third film goes right back to the same level as the first.
- Took the Bad Film Seriously: Jon Voight in the sequel. One could've easily thought that he would just go Ham and Cheese in this kind of film, but he's the only one not delivering his lines in monotone and attempted to make his character actually expressive.
- Uncanny Valley:
- The CGI used to make the babies' mouths move. It seems to have been lifted wholesale from Clutch Cargo.
- Don't forget the animatronics, especially the baby and the clown.
- Uncertain Audience: One has to wonder what audience a film series such as this was meant for. It's simply too juvenile for adults and too dull and stupid for most kids who probably cannot relate to the "talking" toddlers onscreen; proof positive that a live-action version of Rugrats lacks the charm an animated show like Rugrats brings with this concept.
- What Do You Mean, It Wasn't Made on Drugs?: The entire series easily can count is this, but the first sequel cranks this Up to Eleven.
- WTH, Casting Agency?: Respected actors such as Kathleen Turner, Kim Cattrall, Christopher Lloyd, Dom De Luise and Jon Voight all committed to parts in the first two films. To say that their talents are not used well in either would be an understatement.
YMMV / Baby Geniuses