Continuity mistake: When it shows the plane flying to London, in the first shot we see it is a huge craft but when it shows the inside it is very tightly compact and narrow.
Continuity mistake: When Peter Pan starts fighting Hook's pirates on the ships deck, he pushes the second pirate who attacks him into two barrells. Where the pirate is pushed, there are two barrells (which he flies into), a large wooden crate, and another large wooden crate with a barrell laying on it. Then when it cuts, there's now THREE small crates instead of the one large one, and there's now TWO barrells on top of the other crate! (01:44:50)
Visible crew/equipment: When the pirates try to get Peters shoes, after he first arrives at Neverland, Tinkerbell starts fighting them. In one shot a pirate gets hit by a very large saucepan, and falls back-first off a balcony. The very long wire is very visible. It's really long and goes all the way from attached to his back, to offscreen. (00:36:00)
Revealing mistake: When the biggest "lost boy" curls into a ball and rolls down the gangplank scattering pirates, he was obviously a dummy. (01:48:10)
Continuity mistake: When Peter is fighting Hook in front of the crocodile clock, he uses his sword tip to fling the pirate-hat and its wig attachment off of Hook's head and it flies over and lands on one of the Lost Boys heads. When it lands on his head it is wonky. But in the next shot it is sitting on his head perfectly straight and is then wonky again in the next shot. (01:57:00)
Continuity mistake: When Peter is hit by the flying baseball that knocks him out, when he falls to the ground he has nothing attached to the large black belt that goes around his waist. But in the very next shot there is a small brown pouch that is tied to the belt, to his right side. (01:28:10)
Continuity mistake: The golden sword of the Pan gets a lot of use in the final fight scenes. A lot of shots show that the sword gets tiny notches on the sides from all of the clanging against things. However, when Peter passes the sword to the large Lost Boy, the sword's edges have been beveled smooth.
Revealing mistake: In one shot when a group of the Lost Boys are catapulted up into the air so that they can land on the side of Captain Hook's pirate ship, when they all hit the wooden pillared side it can clearly be seen to bounce as they land on it. It is possible to give some leeway on their weight making some effect - but not so much as to make the wood 'bounce' like it is made of soft material. (01:46:30)