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.
Continuity mistake: When Chosen One is going to fight Betty in the lake when he is swinging his chain, Chosen One is stopped by a man who turns out to be Ling's father. In Steve Oederkerk's closeups, the sky is a light blue with some clouds, but in the long shot with Chosen and Ling's dad, the sky is dark with few clouds.
Continuity mistake: When the Chosen One wakes up in the scene where he meets Whoa, his hat is in front of him and about two inches to the left of him. But the next shot of him stretching and waking up his hat is way farther away, so either he, or his hat moved.
Continuity mistake: When Chosen sees all his friends wounded in the field, he has a tattoo saying "mouth" with an arrow on his left cheek. The tattoo can't be seen after this scene. There was a deleted scene where Chosen One was captured and tortured, one of the tortures was to tattoo an arrow that said 'mouth' on it. In another one, the "one boob" woman uses magic to erase it. Still a mistake, but there's the reason.
Continuity mistake: When the Chosen One is meeting with Master Tang, in the first shot you see that Master Tang is sitting down. However when Chosen One says "and that day, I vowed to find the man who killed my family", you see Master Tang walks past the Chosen One.