Disowned Adaptation: Castlevania producer Koji Igarashi wasn't very fond of the Sega Saturn port, which was developed by a different team (Konami Computer Entertainment Nagoya), as noted in the June 2007 issue of Play Magazine:
"I understand why fans who've never played the Saturn version would be interested in those features, but I really, really don't feel good about them. I couldn't put my name on that stuff and present it to Castlevania fans." — Koji Igarashi
Dueling Dubs: The PSP version vs. the original PS1 version, which can be now found in the Playstation Store.
Shaft Debuted in Symphony of the Night: Shaft was cut out from the SNES version of Dracula X despite appearing in the original PC Engine game, so most players outside Japan first knew about him in this game.
Shout-Out: Someone, presumably on the original U.S. localization team, is a big fan of The Silmarillion. Weapons include the game-breaking Crissaegrim (named after a mountain range in the book), the Mormegil (a black sword featured in one of the major tales) and the Fist of Tulkas (one of the more powerful gods).
What Could Have Been: Unused voice acting featured in the sound files of the PS version reveals an unmade ending in which Maria becomes a demon, much like Annette did in Rondo.