Just follow the storyline. Essentially, beat Alpha, and you'll "beat" the game, although subsequently there will be a lot of extra material. This question is better resolved by visiting a walkthrough, for which I recommend using gamefaqs.com
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
you cant
Trade.
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.
Mamoru's room.
You can buy one of those in Yoka square.
You have to have beat alpha and you need 100 chips in your library. then you go to where you got the gigfreze program and press a on the giant hole