Continuity mistake: When Jiminy Cricket finds Pinocchio playing pool, the 8 on the ball is facing away from Pinocchio. Then when Jiminy hops on it and starts complaining, the 8 is facing towards Pinocchio.
Continuity mistake: Before Cricket arrives, Pinocchio watches the 8 ball. The wide angle shows the painted 8 on the opposite side to where he is, but from Pinocchio's blurry POV angle the 8 has swapped sides and it's in-front of him. note: This mistake has nothing to do with the already listed one about the 8 ball. This one takes place before Cricket arrives.
Continuity mistake: When we first see Gepetto inside Monstro's belly, he's wearing stockings and shoes. However, when Monstro sneezes and everyone escapes, he's barefoot, but there's no time for him to take them off.
Factual error: The manner in which Monstro sneezes is indicative of an animal with nostrils. Whales have no nostrils, thus he would have sneezed them out through the blow hole at the top.
Continuity mistake: When Pinocchio starts singing "I've Got No Strings" at Stromboli's Stage Show, he is standing between some strings, which were not there in the previous shot.
Continuity mistake: While Pinocchio is chatting with Stromboli, the feather that is normally on his left side of the hat, is on his right side in several shots. After that, it's back on his left side.
Continuity mistake: When Pinocchio is given his book for the first time, you can tell there are no letters on it. Later, when Honest John looks at it, the letters ABC have appeared.
Continuity mistake: When Jiminy runs into the pool room and finds Pinocchio changing into a donkey, there is a small pot next to the door. When they both run out of the room, the pot is gone.
Continuity mistake: When Pinocchio takes a big puff of his cigar, the label is smoked off, but a few moments later the label is back on the cigar.
Continuity mistake: When Jimminy falls down the pool hole, there is a card at the edge of the table. When he comes back up, the card has been replaced by a die.
Audio problem: When Honest John drops the bag of gold on the table, you can hear it hit the table before it actually does.
Continuity mistake: The stones Cleo pushes up in her bowl while inside Monstro's stomach disappear in later shots.
Continuity mistake: When Pinocchio's nose has grown so long that there is a nest at the end, he shakes it and the laves fall off of all but one branch. But a couple seconds later, there are leaves on two of the branches.