(no subject)
Screenshots from a dating game featuring buggy bishounen.
(The interesting bit, I find, is that some of them have whole heads under their hair, and some of them don't. Wonder why the discrepancy?)
(The interesting bit, I find, is that some of them have whole heads under their hair, and some of them don't. Wonder why the discrepancy?)

no subject
With a lot of these games it's actually a layered kind of image with commands to take layers away as the move back and forth. Usually this is just switching out the face for ^_^ and v_v and ^-^;;; type expressions but sometimes they will be more complicated with the character moving back and forth.
Additionally, for the original base image they will sometimes have a frame work of what kind of area that they need to cover - something that you should never see. They might also use layers for focusing on the body etc, face etc. Especially if it's different artists doing different parts - that usually gets merged in the final version and you switch who images - or to conserve space only the face bits get switched out over a background of the character.
However what they've done I think is that they've separated EVERYTHING into layers, but have mucked up the commands so only 1-2 layers show at at time but because the number of layers is going to be different for different parts, it's inconsistent which bits vanish and which bits don't.