Enter one of the following as your name...

RICHTER - Play as Richter (must have at least 190% done with the game)
AXEARMOR - Play in Axearmor
X-X!V''Q - Have 99 luck

Alucard Spells:

Summon Spirit: Back, Forward, Up, Down, Attack button
Tetra Spirit: Charge Up, Move to Down, Attack button
HellFire: Up, Down, Half-circle from Down to Forward, Attack Button
Dark Metamorphosis: Half-circle from Back to Forward, Attack Button
Soul Steal: Back, Forward, Half-circle from Forward to Back, Forward, Attack Button
Sword Brothers (with Sword Familiar equipped as a relic): Half-circle forward from Down to Up, hold Up for 2 seconds, Down + Square
Wolf Charge (as Wolf) : Quarter-circle from Down to Forward, Attack Button
Wing Smash (as Bat) : Hold X, then 3/4-circle from Up to Forward, then release X.

Holy Glasses:
To get the Holy Glasses you need the gold ring (after beating the Succubus in Nightmare, located in a side path in the long tunnel to the underground) and the silver ring (in the hall of spikes in the tower, you need the Spike Buster armor from the underground.) Take these to the clock tower and equip them. You'll get a L-O-N-G sequence before it lets you go down. Follow the path to find Maria, she'll give you the Holy Glasses.