I would be horrified if this was real.
I named a Pokemon Plaguereap, and tried to design something that matched it. First I thought of a rat, because rats spread the plague, but this Pokemon is meant to be terrifying, so a rat would be...underwhelming.
I decided to incorporate the witch doctor mask, and make it creepy, and unnerving, with black spaces, then tiny, red eyes.
So, I'd say the typing would be ghost and dark. It could be called The Plague Pokemon.
Unfortunately, it does look rather humanistic, and unlike a Pokemon.
It looks like something from nightmare before Christmas.