A mysterious Navi force has taken control of the lnternet!! Now it's up to Lan and his friends to infiltrate the the Dark Chip Factory in the Nebula Headquarters and destroy the Dark Chip production system. The survival of cyberspace hangs in the balance! The hit Mega Man Battle Network 5 series blasts onto the Nintendo DS system with the cool features of the original Team Protoman and Team Colonel. Create your own dream team by choosing Navis from both teams! Plus, experience advanced new features exclusive to the Nintendo DS including dual screen Pet access, cyber maps and wireless gameplay!