How do you get a dark aura in Megaman 3

In Megaman Battlenetwork 3 Blue ONLY DarkAura A is available as a reward for completing the Serenade Time Trials. DarkAura is not available in White without cheating. The Time Trials consist of the alpha versions of all previous Navis (excluding Punk, Serenade, and Bass, while Alpha isn't a Navi) which must be defeated in a given time limit with an extra folder. They are available in the Secret Area after defeating BassGS.