Has anyone else noticed that the sound of the monsters in the clubbox change depending on their costume?

At first I thought that the fact that they sounded different was because the handlers went in and changed it even in the pomily act, but just note when I was listening to epic phangler I noticed he sounded different and I switched his costume and found out on accident that he sounds different depending on his costume, the same thing happened with pompom in the previous act but I never related it to having a new costume on