Continuity mistake: When Kyle first breaks the car, and Chucky flies out the window, behind the wire fence you can see loads of barrels and crates. But when Kyle smashes the car into the fence in an attempt to hit Chucky, in a wide shot you can see all the barrels and crates have fallen over, but there are less barrels and crates than in the previous shot. (00:56:15)
Continuity mistake: In two different places in the movie, Andy's foster parents have the same argument with the EXACT SAME dialogue, about Andy being too much to handle. Obviously, the director decided to try the dialogue in two different settings, and both scenes were accidentally left in.
Continuity mistake: When Andy, Phil and Joanne are driving, a big truck suddenly appears in front of their car so Phil has to urgently stop the car. Then you see the car has pretty much stopped. It then cuts from under the truck and you can see the car is still moving a few feet before stopping. (00:09:45)
Continuity mistake: When the fire alarm has been set off, all of the children run down stairs, and at the end of the line of children, we see Andy who stops at the top of the stairs. When he stops you can see a girl holding a teddy going down the stairs, and she is nearly reaches the bottom. But when the shot changes, the girl is nearly at the top of the stairs again. (00:57:50)
Continuity mistake: When Miss Kettlewell throws Chucky into her closet, on the right of her big silver desk is a black pencil pot. But in the next wide shot of the classroom, the black pencil pot has moved much further to the left of her desk. Other items on the desk, such as the sheets of paper, and books also move. (00:34:10)
Continuity mistake: The first shot of the movie is an extreme closeup of Chucky's eye. Two shots later, you get a view of his whole face... and his eye is completely different. The color and design is slightly different, and the charred plastic around it doesn't match. The scene was shot with two different props (an oversized eye for the extreme closeup as confirmed in the commentary, then a regular sized doll-head for the next shot), and they didn't quite match.
Continuity mistake: Early in the film when the Chucky doll is being rebuilt, he is put together limb by limb and has a hard plastic body. When the doll is complete and seen in later scenes throughout the movie he has floppy arms and legs which would indicate a stuffed soft body doll. The good guy doll was shown as a soft body doll several times in the first film, like when Maggie picks him up from from in front of the TV by his arm. (00:03:10 - 00:15:30)