In "A Monster of a Mystery", Angie, Nicky, Von Bolt and Joelle are playing a game standing in front of the virtual reality window. However, in the next shot, they are suddenly standing in front of the couch.
In "A Monster of a Mystery", JD and Kent see what they think are monster footprints in the snow. Later, they find out that they are snow angels made by Von Bolt and Joelle. But the snow angels do not look anything like the footprints from earlier.
In "Smells like Teen Stink", a crowd member shouts "Stink Man! Stink Man! Yeah!", but nobody in the crowd's mouths are opening. Plus, what he said sounded more like "Stick Man".
At the end of "Smells like Teen Stink", Nicky says "Genius!", but her mouth is closed. After, her mouth opens but she is not saying anything.
In "Ape Escape" when Angie asks, "What is going on there?" she speaks with Nicky's voice.
In the first part of the Christmas special, Nicky tells Von Bolt that Christmas is still four weeks away. However, by the fifth part of the Christmas special it is somehow Christmas Day already.
In "Monster Smash", Kent reveals that he is allergic to kisses. But, in "Futile Attraction", he has no problem kissing a girl.
In multiple episodes, Thomas Edison appears to be human even though he's supposed to be a ghost in the show.