Corrected entry: When the coach is getting ready to take the Frankenstein monster to Rome, Anna says "Nothing is faster than Transylvanian horses - not even a werewolf." Yet during the coach journey, the werewolf attacks the coach. How could it have caught up with them? (I don't think the Brides could have carried it - carrying such a large and heavy creature would have slowed them down too much).
Corrected entry: The vampires in this movie are able to move around outside during the day when it is overcast because the clouds are blocking the sun. The fundamental flaw with this is that sunlight can penetrate clouds, or else it would be completely dark when it is cloudy, so these vampires should have been destroyed.
Corrected entry: When Anna and Van Helsing are tailing the werewolf, Anna sees some fur hanging on a tree. Anna tells Van Helsing that after the first full moon a person remains a werewolf forever. Earlier in the movie, there is a shadow of a werewolf chained to the wall. Obviously the Velkan werewolf since Velkan had killed the werewolf that bit him. Since this werewolf is Velkan then that means that his first full moon has occurred and he should be trapped in werewolf form up until his death. But when he returns to his home he is seen as a human for just a few seconds, before changing back to a werewolf.
Corrected entry: The placement of the regions on the map is a bit mixed up: in reality, Budapest was (and is) to the Northwest of Transylvania, not to the Southwest. To reach the Vatican by starting off South from Transylvania would be more than a five hundred mile detour. (01:11:40)
Corrected entry: When Verona rips the side off of the coach, there is nothing inside, yet in a few shots later, she sees a bundle of stakes attached to explosives. (01:14:05)
Corrected entry: After Dracula has bitten Dr. Frankenstein, Dracula just drops the body. Based on the way Dracula drops it, the body should have fallen on its side. When the Frankenstein Monster is picking up the body, the body is now lying perfectly straight on the ground with its arms at its sides.
Corrected entry: When Frankenstein's monster falls into the windmill in the beginning, you see a large gear fly up and out at the exact same angle at which Frankenstein just fell. Physically impossible, unless of course the gear was able to somehow move through the creature. And it does NOT have to do with Frankenstein falling into the cave underneath. (00:06:55)
Corrected entry: Before Anna first sees Velcan transform into a werewolf, her hair changes slightly in several different shots while she investigates the strange noise.