Chucky: We're friends 'til the end, remember?
Andy: This is the end, friend.
Karen Barclay: I said talk to me, damn it. Or else I'll throw you in the fire.
Chucky: You stupid bitch! You filthy slut! I'll teach you to fuck with me!
Andy Barclay: Chucky says Aunt Maggie was a bitch and got what she deserved.
Karen Barclay: Andy. How can you say such a thing?
Andy Barclay: I didn't say it, Chucky did.
Chosen answer: This isn't a mistake. John made the voodoo doll himself. When Chucky said he was "prepared" for it, he meant that he was prepared to do whatever it takes to get information from John about his being wounded. Even killing him as we see.