Newer SMB3 Mario is due for an overhaul.
In the meantime, given that Halloween is approaching us, please enjoy this offering of a WIP creature that just might be in SMF:R to steal your body and your lives.
If you've played any of Scriptwelder's Deep Sleep flash games, you just might recognize this one. The sprites on the gray background are an experiment in softening the creature's outline, making it more... uh, shadowy.
EDIT: tried using a feather effect for the blurred shadow people