Castlevania: Harmony of Dissonance is a Metroidvania developed and published by Konami, released for the Game Boy Advance on June 6, 2002. It follows Juste Belmont, heir to the Belmont line, as he hunts through a castle that seems to exist as two overlapping worlds, searching for his vanished friend Maxim and for the relics that will open the way onward.

Harmony of Dissonance is remembered for its twin-castle structure, the spell books and sub-weapons that turn Juste’s whip into elemental attacks, and a brighter, more colourful look than its handheld predecessor. It is a mainline entry in the Castlevania series, and one of the trilogy of Castlevania games released on the Game Boy Advance.