This guide comes from GameFAQs. The author kindly released it under the GFDL, thus allowing it to be reproduced here. The original history/credits follow.
B O S S G U I D E
+ Updated December 25th, 2005 5:49 PM
For the Nintendo NES Version 1.3 (FINAL) Written by Pseudonym Email: firstname.lastname@example.org
November 18th, 2005 - Version 1.3 (FINAL)
Added a few things here and there, and fixed some mistakes. I scrapped the stage strategies, since I'm working on a full walkthrough as a future guide.
This document is licensed for public use according to the GNU Free Documentation License, available at http://www.gnu.org/licenses/fd1.txt. Copyright 2005 Tim Courchene aka Pseudonym. All rights reserved.
Konami for creating this game.
David Wonn for some stuff that I took from his excellent Castlevania FAQ. I hope he doesn't mind.
Pepsi and Mountain Dew for keeping me awake while I'm writing, as always.
And you for reading. Thanks.
Anyone else who contributes will get a nifty spot here, so don't delay, contribute today!