DemiKids: Dark Version is a Game Boy Advance RPG where you play as Akira, tasked with sealing a rip in time that's tearing the demon world, Valhalla, apart. The goal is to collect demons and fight against creatures that have been let loose, while also repairing the rift before time itself is destroyed.
The gameplay involves traveling through the land, recruiting demons, and battling against various enemies. With 350 creatures to recruit, you'll need to trade with DemiKids: Light Version to collect them all.