Revealing mistake: When Chosen One meets Ling and she shows her bra for a second, her shirt doesn't even open the way she opened it. (00:17:40)
Continuity mistake: When you first see Betty swinging the chain near the waterfall, in the first shot of him the water is quite rough, but in later shots it is really smooth.
Deliberate mistake: When Chosen One is dancing in front of Betty, take a look at Betty's face. There is a moment in which the face of the double playing Betty is visible.
Continuity mistake: When Master Tang is in bed, you see a reverse view of Wimp Lo and a guy behind him. When Wimp Lo says, "I'll do it", and Master Tang says, "In your dreams", the guy who was behind Wimp Lo is now beside him.
Continuity mistake: When Betty gets the letter from the evil council, there's nothing but a wall behind him in the first shot, but the next shot, there's a window behind him. (01:02:25)
Continuity mistake: When Moon Yu, the cow, had all the milk drained from him and he fell on his back, there is no bush behind him. But in the next shot there is one. Plus, watch his tail as Chosen walks away. As it sways from side to side it disappears.
Continuity mistake: Before Chosen One gets captured by the tiny net, you see him running out of a field. But the closer shot of him, there is no field behind him.
Visible crew/equipment: In the opening credits sequence, where Chosen One is driving a car and Master Tang as the narrator says "And sometimes he drove," you can see the faint reflection of the camera car filming. It's best to see on the tail of the car and just below the silver bar you can see the wheels of the camera car. (00:07:10)
Continuity mistake: When Chosen one meets Mu Shu, his face gets very bright with light, but when you see a really wide shot of Mu Shu, it's all dark and not bright at all.
Revealing mistake: When Chosen One is training and Wimp Lo comes up to him and says: "Knock, Knock. Who's there?" You can see that he is transparent because the scenery is visible through him, this is easily seen in his black hair. It is also apparent when he says, "Take a close look 'coz I rule baby". But by the next shot he isn't transparent anymore. (00:20:00)
Continuity mistake: When Chosen One is training to defeat Betty by practicing on wooden dummies, there's three shots of him hammering. In the first two the wooden Betty had lots of hair and a mouth, but in the third one, it has a little bit less hair and no mouth.
Visible crew/equipment: After the scene with Whoa, Chosen One has a flashback about the necklace she was wearing. Look at the blue part of his mother's necklace, you can see a camera reflected.
Continuity mistake: When Betty keeps getting hit with sticks, you can see that Master Tang is wearing the same clothes and same hat, and standing spot as the chosen one, but next shot where Master Tang was, it's the Chosen One. (00:23:20)
Revealing mistake: When Chosen One is fighting the gang during the credits, there is one shot where he is midair and he is swinging around. You can see the rope around his waist but the wires have been digitally taken out. Guess they forgot the rope though. (00:08:25)
Continuity mistake: Before the Chosen One smacks a hole in a guy in the beginning he appears from a hole. If you look fast, you will see that he has green stuff on his back, but a few shots later, its dissappeared.
Other mistake: When Betty is beating up the Chosen One and Ling's father, once he gets the claws back in his hands, shouldn't they be bloody? Or at least wet?
Deliberate mistake: At the beginning, when The Chosen One is a baby and is rolling down the hillside, he loses a booty. In the next scene, he is wearing it again. He has them for the rest of the movie.
Continuity mistake: In the training scene when Chosen One and Wimp Lo are talking, there is a building behind Wimp Lo. In another shot there is now a guy training there.
Continuity mistake: When Chosen One hits Betty and sends him flying out of the temple, there is a guard seen outside the temple. But then he dissapears and is never shown again.
Continuity mistake: When Betty receives the letter from the evil council, look at his jacket. It has long sleeves, but when he stomps the letter to the table, the sleeves disappear.
Answer: Some scenes/shots were taken from the old movie, while others were made specifically for this movie. Additionally, numerous shots were "composited" to place new characters in the old footage.