Prepare yourself for a world that's rife with evil demons, special powers, and magic spells. Jin (the main character of Light Version), Akira (the main character of Dark Version), and Lena have accidentally released demonic creatures, and now it's up to you to capture them all. Follow these characters as they collect more than 350 demons, and unlock demons from other versions of the game. The Demon Fusion system lets you create new demons or strengthen existing ones. You can also link two Game Boy Advances to enhance your assortment of demon allies.