What do you do after finding the origami bird in megaman battlenetwork 3 blue version?

You take it back to the ghostnavi in the principal's computer. He will forget the clue to Rank 6, BUT, (of course) Chaud e-mail's you that Rank 3 posted on the ACDC BBS talking to you. You check out the message, and go meet him in Undernet 4.