White Crystal

Lets you see hidden platforms.

Buy it in the Town of Jova for 50 Hearts.

Blue Crystal

Allows passage beneath lakes.

Give the White Crystal for the Blue Crystal in Aljiba.

Red Crystal

Allows you to pass Deborah Cliff.

Give the Blue Crystal for the Red Crystal in Aldra.

Rib of Dracula

Deflects fireballs when you are motionless.

Berkeley Mansion.

Heart of Dracula

Show it to the Ferryman, to go to Brahm Mansion.

Rover Mansion.

Eye of Dracula

Allows you to see objects inside walls.

Brahm's Mansion.

Nail of Dracula

Allows your whip to break certain walls.

Bodley Mansion.

Ring of Dracula

Needed to enter Castlevania.

Laruba Mansion.

Silk Bag

Lets you carry 8 Laurels rather than 4.

Drop Garlic in a cemetery SW of Aldra.

Cross

Needed with all of Dracula's body parts to enter Castlevania.

Defeat Camilla.