Play as Richter
To be Richter beat the game. Then watch the credits. After the credits start a new game and put your name as Ricter. If you do it right you will be Richter!

Inverted Castle
While Playing Richter use the holy glasses that Maria gives you and hit only the green orb. DON'T hurt Richter.

Sword Card
While in Olrox's quarters position Alucard on the bottom path under Olrox's Room. Do a soul steal.

Secret Room - Merman Area
Break through the rock in the middle of the room. Turn into the bat and fly through the tunnel on the top. The bat will flip the switch.

Librarian's Secret Stash
You must first have the Super Jump Relic. After that go to the room that is under the librarian. Repeatedly jump in the narrow space w/o touching the ground and make sure his chair hits the floor before you jump again, if done right you will receive a Ring of Arcana if you continue to jump you will receive Dracula's Tunic and after that you'll get a Axe Lord's Armor. NOTE: This trick will need to take some patience.

Axe Lord Armor
After beating the game once, start a new file with the name AXEARMOR. You'll find a some armor that will actually turn you into an Axe Knight!!!