Continuity mistake: In Season 2 Episode 22, Model Behavior, Woody has gotten his braces off. However, in this episode, he has braces back on again.
Character mistake: Bailey says that Princess Xaria perished before she ever got to see her crown; but when Xaria possess Bailey later, the spirit says she wore the crown to prom.
Continuity mistake: Moseby shows a 'Mood Hanky' to London, and it turns purple when London embarrasses him. When the other characters reveal their inventions, 'Granny Smith' and the robot feed Moseby a sandwich. Moseby enjoys the sandwich, saying "Mmmmmmm! Cheesy!" Even though he is happy, the Pocket Hanky is still purple.
Continuity mistake: In "Broke 'N' YoYo", when Cody has just sat down to talk to Zack after collecting loads of towels, in the first shot the towels are on the chair in front of him. In the next shot, when Cody leaves to practice, the towels have vanished. And in the next shot, when Bailey and Zack are talking, the towels are back again.
Factual error: In the beginning of the episode "Show and Tell", you can see Woody clipping his toenails on the bed. You can see how many toes he has one of his feet. He has 5 toes. Yet, in one of the first episodes, Woody states he has 8 toes on one foot and 3 on the other.
Revealing mistake: When Zack and Cody are tied up by the secret spy, when Cody is texting Bailey "Help Me" with his toes, you can see that the Mobile has a black screen, and is turned off. And he was just hitting random buttons with his toes.
Continuity mistake: During the Hugh Grant movie, Cody tries to take a bite out of Bailey's licorice, which she holds in her right hand as she holds the bag in her left. After Bailey asks if there's something wrong with Cody's hands, the licorice and bag have switched hands.
Factual error: In the credits, it says that the twins' dad is called Rick Martin when in the storyline he is known as Kurt Martin.
Continuity mistake: In the episode when Cody is teaching the class cooking, in the scene where Bailey and Woody agree to work together, Zack is pictured at the snack-bar on the right, but then he appears from the left and speaks to a lady.
Revealing mistake: In the final scene where Cody is in the finals for A Yo-Yo competition, Zack's towel gun (which he uses to get towels to people) malfunctions and sends towels flying. Look closely and you'll see that the number of towels in the gun is not decreasing. It's obvious that the flying towels are fake.
Continuity mistake: In the episode when Cody is teaching cooking, while Bailey and Cody are talking about the other students, behind Bailey there is a man with a striped shirt. Between shots not only does he disappear and reappear, but later in that same scene behind Bailey he is seen coming down the stairs.
Bon Voyage - S3-E6
Revealing mistake: When Mr. Moseby gets scared by the dolphin, you can see the dolphin is CGI.
Mean Chicks - S2-E27
Continuity mistake: London's tape recorder has a clear tape cover and square speaker for the first two shots; a solid grey tape cover and round speaker in the next shot, and then she was holding it upside down in the last shot.
Factual error: Zack and Cody are often seen on their cell phones, however being out at sea they would not have reception.
Chosen answer: One: Zack doesn't meet Maya until after the movie. Two: There are 2 possibilities. The first one, the steps might worn off after they got to the ship. and the second answer, London said she talks to animals since she ate them, it never worn off.
Zack definitely met Maya before the movie takes place, SPOILER in the final episode when they break up Zack says they've been together for 3 months, and not only does the movie take place during spring break which is less than 3 months from normal graduation, but also their graduation date gets moved up since the ship got sold.
The movie is set between the last two episodes; they had already met.