Inspired by the following image I found on Google: http://www.bookmice.net/fleur/devilgotch/devilfront.jpg. It's a devil-Mametchi, one of the adult Devilgotchi forms. Devilgotchi was a spin-off from the hugely popular virtual pet, Tamagotchi.

Sketched in HB pencil, the rest is black ball-point pen. Please comment if you want. :)

Tamagotchi original concept (c) Aki Maita + Bandai.