Continuity mistake: The patches on Jimminy Cricket's hat change size, color, location, etc. throughout the entire movie.
Continuity mistake: When Pinocchio is talking with Stromboli, there is a bag of gold on the tables with coins spilling out of it. But after Stromboli locks Pinocchio in the cage and comes back to the table, the bag is empty and lying on top of the coins.
Continuity mistake: When Jiminy earns his badge, in one shot it is mostly over his red shirt, but in the next it is mostly over his black jacket.
Continuity mistake: On Pleasure Island, Lampwick uses a match to make a scratch on the Mona Lisa. The length of this scratch changes between shots.
Audio problem: When Gepetto is fishing inside Monstro's belly, his lips do not move when he exclaims "Here's another one!" or "I got it!"
Continuity mistake: When Lampwick sprouts a tail, the patch on the seat of his trousers has stitches around it. These stitches disappear moments later.
Continuity mistake: When Pinocchio says he is going home, Stromboli starts laughing. Pinocchio asks if he thinks that's funny, and he replies, "Sure." In this shot, there is a gold coin on top of Stromboli's knife, but in the next shot it's gone.
Continuity mistake: When Lampwick says "Ah, you smoke like my grandma" the white pool ball has moved to the other side of the table from where it was when Lampwick made his last shot.