Corrected entry: In one scene, Cody has a poisonous thorn-type thing in his foot. After removing it, "Big Z" needs to neutralise the poison, which he does by (quote) "peeing" on the wound.Big Z is a penguin, a bird, and birds don't pee. Obviously, when creatures have been anamorphized, they will do things that they can't in nature (like talk in English!), but it is still, strictly, wrong.
Corrected entry: When Cody notices he lost his necklace his reaction helps to make Geek aware of how much he has changed. Hovewer, Cody has his necklace in the previous scene (sure-fire cure, in Geek's house) up to the point when Lani stuns him, after which Cody doesn't regain consciousness until morning (clearly visible on his neck). At that point, Cody's necklace somehow transfers itself to another room where Geek finds it later (Geek couldn't have moved it, since he has to search his house to find it, nor could Lani, who went home earlier, or Cody, who has been unconscious the whole time).