First Game Boy Advance Castlevania title.
In addition to the usual array of secondary weapons, this game features the DSS Card system. Through this system, you can get two sets of card, and combine any one card in the first set with any card in the second, and get a unique ability. There are 10 cards in each set, which makes for 100 different combinations.
In the Japanese version, Death has dialogue with the hero before their battle. This is not the case in the American version.
For American gamers, this was the first appearance of Carmilla since Simon's Quest on the NES.
According to the creators of the Castlevania series, this game is no longer a part of the official series timeline.