Level Select
At the main menu, enter the password option and type in:

3NKFZ8 - level 1
9MD1WV - level 2
XTN4F7 - level 3
5BVPL2 - level 4
9D6F0S - level 5
TSCNB4 - level 6
CSJTQZ - level 7
BNPXZ9 -level 8
GH9MR - level 9 (End)

Special move
To do the special move, you must hold A, walk up to your vampire opponent and press B. You should flip the vampire leaving it on the floor for a few seconds in which time you can stake it.