Castlevania Double Pack

Castlevania: Double Pack is a compilation package for the Game Boy Advance handheld system which contains two Castlevania titles: Castlevania: Harmony of Dissonance and Castlevania: Aria of Sorrow. It was released on January 10, 2006 in North America, and later that year in Europe.

Features
Both games are included in their complete form, allowing players to either pick either Juste Belmont or Soma Cruz in their own adventures against the forces of evil.

Version differences
The Medusa Pendant, the Mirror Pendant and the Gold Headband were removed from the Double Pack version of Castlevania: Harmony of Dissonance.
“No Magic Mode” isn't available for the Double Pack version of Castlevania: Harmony of Dissonance.

Source: TheGamesDB