Character mistake: Eric says he found the little mermaid sculpture "on the coast of Cartagena" - as the subtitles confirm - but he mispronounces it as Cartageña.
Character mistake: Tom Manning criticises Hellboy for using a lighter, (correctly) telling him to use a wooden match instead. But he then lights a match and immediately puts it to the cigar, instead of waiting for the sulphur to burn off and using a pure wood-fuelled flame to light it. He's not as well informed as he thinks.
Character mistake: Archimedes says he told Arthur not to pull the sword out of the stone. He didn't, he pointed it out in the churchyard to him instead.
Suggested correction: Archimedes was trying to be helpful when he pointed out the sword so Merlin could take it to the tournament. But after it became a big issue with the rays from heaven and the legend, Archimedes thought he might get in trouble so tried to act innocent by fibbing. It was deliberate and in character, not a character mistake.
Character mistake: When John Henry Irons is arrested, two police officers lay him face-down in order to zip-tie his wrists behind his back. A close-up of Irons' hands, however, reveals that the zip-tie only wraps around his right wrist while crossing about mid-way on his left thumb, meaning that he could easily remove his left hand from the restraint with very little effort. Arresting police officers would never make this mistake in real life.
Character mistake: During the military parade, check the lady behind the soldier on the left. She can't help stare at the camera the whole time before the soldiers arrive. (00:07:03)
Character mistake: Near the end, Madame Arcati says she'll ride her bike home - "I'll pedal home in a jiffy; it's only seven miles' - but she didn't take her bike; she was driven back with Charles, and the two ghost wives in the back. No room for a bike.
Character mistake: Inside the loop Barron said the only thing he can't change/shape shift is his eyes but when Emma and Enoch rush in Barron is able to change his whole body, including his eyes.
Character mistake: In a scene on Johnny Whitefeather's patio, his son is referred to as a "ten-year-old boy." Later, in a business meeting, Whitefeather says his son is nine.
Character mistake: When Béatrice checks the historic book,Godefroy is born in 1076,but later in the film,Godefroy says that he's born in 1079.
Character mistake: Mr Potato Head gets torn apart by baby Molly after the opening scene. When Andy returns to the room with Buzz everyone resumes their positions, but Mr Potato Head looks for his bits and sits under the shelf with the other toys.
Character mistake: Flynn has been reading for a while, taking notes, spreading books around, etc. - when Nicole arrives and says that it was nice to watch take-off from the cockpit. The plane must have been in the air for a long time by then.
Character mistake: A priest is holding a globe with a fire to light the globes carried by others. There are two lines with globes approaching the man with the lit globe. The first person in the line from the right has trouble lighting their globe. She starts to return for a second try, but apparently thinks better of it and continues on with the unlit globe.
Character mistake: At the beginning of the movie, Marnie states that she is 13 years old. When Grandma Aggie comes to visit, she tells Mom that it is Marnie's 13th Halloween. Since everyone celebrates their first Halloween before they turn one, if Marnie is 13 the events of this movie would occur on her 14th Halloween, meaning her powers would have faded by now.
Character mistake: When the second fog bank rolls in, the weatherman says it is coming from the south-east, and the DJ says the same thing once; the second time, however, she says the south-west.
Character mistake: When Inspector Owen calls the village police station the call is answered by a sergeant but at the end of the call Inspector Owen refers to him as Inspector. (00:10:00 - 00:11:00)
Character mistake: When Darcy walks into the police station the chief calls her Joan, the lead actress' real name, by mistake.
Character mistake: Jenna has Sparkle letters at her work. Wouldn't she get caught earlier?
Character mistake: Big Ben is loaded feet first into the ambulance, he should've been loaded head first.
Character mistake: When Brenda first witnesses Connor and the Kurgan fight, Kurgan says "I am the only one." Afterwards, Brenda asks "What does he mean by there can be only one?" She somehow misheard Kurgan and thought he said the movie's iconic catch phrase.
Suggested correction: This is incorrect. He does say "There can be only one." He's saying it while beating Conner, so the first part is a little muddled and he emphasizes "one", but he does say the line.
Character mistake: It doesn't occur to our heroes (admittedly kids) that you don't need to understand German at all in order to read it out loud. It's arguably easier to read than English! The only inscrutable letter would be "ẞ" but Scary German Guy's right there for help. (True, this is essentially what they end up doing in the end, but they still come about it through a "you don't need to be of age to be a virgin" realization rather than the even simpler "you don't need to know German.").