So then, say you had a two layered cel, one was 
the character and the other was the mouth. The 
character never moved, but the mouth does, so 
hence you would get a douga of the mouth and 
character for that scene. Would they do a genga 
for each move of the mouth? i.e a genga for each 
mouth layer? Or would they do one sketch for the 
whole scene? I suppose the latter...I was 
wondering, because I do have sketches for B1-B3 
of the mouth layer to show the movement. I know 
they do sketches WITH the mouth to show how the 
mouth will look with the face at certain points 
(such as the sketches that say "A1" at the top, 
and the have "B1", "B2", and "B3" all in a row, 
and one of those three is circled and the mouth 
for that part is shown...). Just curious ^_^

Ja!

-Misha-chan