Marvin (Rob Schneider) always dreamt of becoming a cop but unfortunately he is a wimp and doesn't have the right stuff to be one, failing the test as a cadet four times. The closest he can get to being a cop is doing admin work at the police station, bagging evidence and answering calls and it is through one of those calls he takes matters in to his own hands and decides to attend a crime, suffering a horrendous car crash on the way. Rescued by a crazy scientist who uses animal organs to save his live Marvin comes around with new abilities which in turn make him more confident. But despite everything going well and getting a girlfriend, Rianna (Colleen Haskell), Marvin has to deal with animal instincts which come out at night.
"The Animal" has two things going for it; the first of those is Rob Schneider being likeable, delivering the juvenile sort of comedy which will amuse young audiences but without really offending anyone. The second thing is Colleen Haskell who at a base level is cute and cute makes her likeable in fact makes her adorable which is all is called for from her character. But that is it and that means that "The Animal" doesn't have a lot going for it as it ends up pretty much a one gag movie.
That one gag is the comedy of Marvin ending up with animal instincts from being unable to resist behaving like a dog and catching a Frisbee in his mouth to having the agility of a leopard and so on. There is no denying it is amusing to start with but after a while you need something more and whilst we have John C. McGinley showing off his guns as a cop who wears tight shirts as well as the out of place comedy surrounding Marvin's African American friend Miles thinking he is treated differently there isn't much else to "The Animal" than Rob Schneider" dealing with having animal instincts such as sniffing butts and snarling like a crazed dog.
What this all boils down to is that "The Animal" whilst amusing in parts ends up a comedy which only has the one joke and after a while the fun of Rob Schneider acting like an animal wears thin.