Plot hole: When Grug is trying to escape from the explosion behind him he sees Douglas and says "Douglas! Hey I know that guy!" This is not possible since he neither knew the name of the creature or was nowhere around when Douglas was with Thunk.
Suggested correction: Thunk might have told him who Douglas is.
Plot hole: After Little John bores a hole in the bottom of the treasure box, several gold coins fall through the hole. The four rhinos holding the box should have noticed it becoming lighter.
Plot hole: It is apparent that Shrek and Donkey have never traveled to the land of Far Far Away, yet Donkey immediately recognizes the "old Keeblers' place" when he should have no idea where it is or what it looks like.
Suggested correction: Donkey only thinks it's the "old Keebler's place." Puss in Boots then corrects him and says it's the Fairy Godmother's cottage.
Plot hole: Why did Inspector Gadget put his glove on his right hand? We see a toilet brush in place of his hand with a glove on it, yet when he's flying through the air doused in toilet water, he has his glove back on.
Plot hole: In the scene where The Commander and Jetstream are called to fight the giant robot, Will's mom says "What if he forgets his lunch?" In every scene where he's eating lunch at school, Will has a school lunch.
Plot hole: Summer vacation couldn't be taken away just because it is winter, (or just snowy), they could just go by the date.
Plot hole: Kerchak is mad with Tarzan because he showed Jane, Porter and Clayton to the gorilla's current location. Yet he does not move the group even though he obviously knows they're no longer safe there.
Suggested correction: He does actually move the group later on in the movie. Then they get ambushed by the hunters and he is killed.
Plot hole: Frankie makes reference to fear of fire early in the movie in the scene with all the guests arriving at the hotel. And in the scene in the local village with the monster festival, a single match is used to send him on a rampage. But throughout scenes in the hotel itself, there are lit candles, candelabras and torches throughout, most noticeably in Mavis' room during the scene where her monster friends (Frankie included) are addressing her idea of going to a human village. None of this fire affects Frankie at all.
Suggested correction: Candles are a controlled fire, and small in a room that's mostly made of stone. The match at the town was a sudden fire in front of his face that startled him. Even if he was concerned by the candles in the past, I'm sure that in the 115 years since the hotel opened, he was OK with it.
Plot hole: The spell Magicae Maxima works, but it shouldn't have worked at all because there was one ingredient missing, the petrified spider.
Plot hole: Towards the end of "The NeverEnding Story 2", Bastian's dad became aware of his son's adventures in Fantasia. Yet, in this film, he reacts to the news about Bastian stealing the NeverEnding Story as if he's never heard of the book before. Adding to that, he does not recognize the Auryn on his son's sweater nor does he know what it can do.
Plot hole: After being hit with the spores, Cobra Commander cannot walk or even move very well with any speed at all. The Cobra minions have to drag him to their prison with the Joes and just leave him there on the ground after the Joes make a break for it. The Joes go quite a distance to engage Cobra. Road Block is delayed only a couple seconds behind the other Joes when he is grabbed, but knocks out the minion who grabbed him. Suddenly, Cobra Commander is at his feet telling him to wait because it's a trap. Later, Road Block has to carry Cobra Commander because he still can't move much. There's no way Cobra Commander could have caught up with Road Block to warn him of the trap. (00:52:50)
Plot hole: Mater tells McQueen he moved and looked like he just saw the Ghostlight. Sheriff gets on to Mater for talking about the Ghostlight and then their whole plan falls into place to trick and scare Mater with the blue lantern. Only there's no way they would have known that Mater would have mentioned the Ghostlight after that. McQueen didn't know about it, supposedly. And he had been scared by Mater and had been there enough that he would have known if Mater had mentioned it before, and Mater would have known he told McQueen. (00:01:55)
Plot hole: When and how does Uma put a spell on Ben? She couldn't have when he was captured on the ship because she didn't have Mal's spell book at that point. Mal doesn't drop her spell book until after they rescue Ben and are on their way back to Auradon. Does Uma have powers of her own? So why would it matter if Uma got Mal's spell book?
Plot hole: When the Slate Co. boss turns the lever in the casino from "WIN" to "LOSE", how could he know which games Fred was playing?
Plot hole: Alex and Jack go to Liverpool St. Station to find the guys from Jeff Slater's. This is on the day of the funeral, otherwise it would make no sense going there. But when Mrs Jones sees Alex, she says "shouldn't you be at school?" This makes no sense because Alex would not go to school on the day of the funeral. It's not a character mistake because Mrs. Jones would never make that mistake.