Proving the Wybie Theory wrong.
I see so many theories about how the other mother didn't know what Wybie sounded like because he was never in the Pink Palace. This is one of these stupidest theories I've ever seen. And I can prove it wrong.
Coraline's friends from Michigan we're never in the pink palace, but the other mother knew exactly what they sounded like.
This theory also completely disregards the overall use of the doll. It was created so the other mother could lure neglected or unhappy children into her world. Being able to do that, she uses the doll to hear and see everything. Wybie originally had a doll before he gave it to coraline, so the mother knew what he sounded like through the doll.
It's kind of like the same with how the other mother made coraline's neighbors look better in the other world. By hair, by body, etc.
So, this theory is proven wrong. It has nothing to do with the Pink Palace.
A theory that I do believe is true, is that Wybie couldn't speak because the other mother knew that he would try and help Coraline or try and warn her.