Oh neat, someone created proper Vampire Wario sprites for Wario Land 4...

[CM30]

As in, the humanoid version from Wario Land 3, not just the bat one from this game:

MFGG - Mario Fan Games Galaxy

mfgg.net

Looks pretty neat if you ask m!

 

[Just a Wario Fan]

That version of Vampire Wario looks both funny and creepy.