The ranked navis are:
Rank 10: in HadesNet.
Rank 9: in HospComp 2 through the warp in Beach 1
Rank 8: in Undernet 3, where FlamMan and Bass were.
Rank 7: in PrincipalComp 2
Rank 3: in Undernet 4
Rank 2: in the DNN BattleComp
Rank 1: in Secret Area 3.
Don't try to go directly from one to the other; follow the game's plot to advance. Also, searching for Rank 1 before you've beaten Alpha will be a waste of time: he's a secret boss only available as an extra feature. And, you have to progress one rank at a time. Jumping to Rank 2 from Rank 10 will be pointless; the navi just won't be there. Undernet 4 is accessible through Undernet 2, after talking to the purple navi at the top of the Area.
Go back to the "ranked" guy in the teachers Comp.
no you can only link megaman games together if it is the same number like megaman battle network 3 blue to megaman battle network 3 white
HospComp 2 through Beach 1 using the HospCode to vaporize the security cube. Class dissmissed.
Trade.
you cant
hit start go to megaman then go to navicust
In Megaman Battle Network 6, It doesn't have The Undernet 3, but it has Undernet Zero where you can fight Bass at there.
google them even though i dissaprove of cheating in megaman games
No, it's not.
Go to the Under Square.
Go to GameFAQs; they have a chip list FAQ.
You can buy one of those in Yoka square.