Other mistake: The Good Guy dolls are said to be manufactured by the Play Pals toy company. Later, when Karen picks up the box that Chucky came in, on the bottom left corner of the box are the words Play Partners Toys.
Other mistake: Being struck on the forehead with a toy hammer would not cause someone to be knocked off balance to the point that they are flying backwards the 15-20 feet or so we see with Maggie.
Other mistake: In the scene where Maggie is carrying Chucky into Andy's room with Andy, you can see the arm of the doll has popped out of it's socket in one shot, as the material of the shirt is stretched far beyond it should be. It is back to normal in all other shots.
Other mistake: When Charles enters the toy store, he shoots the the lock and misses, however the door opens right away.
Other mistake: Chucky emerges from the fireplace, engulfed in flames, walks to the couch and is seen crawling on the couch before falling to the floor and burning on the floor. And yet nothing else catches fire, and the few tiny flames that do drop, like on the corner of the wooden table, don't spread and put themselves out.
Other mistake: When Karen is fighting Chucky for the first time, she's holding him, but also pushing him away. At one point he's about arm's length away and she moves her hands so she's not holding him and he's not holding her, but he doesn't fall. In the next shot, his legs are up against Karen's body.