I just beat Battle Network 6 and can someone tell me what i can do at the end like fight bass or something ...Thanks

Well, my young friend, there are two good ways to go:

1. post in the topics at the top of the page, the ones with the red microphone thingy next to them.

Or:

2. Go to GameFAQs.

Man I wish I had BN 6 just a few more weeks and maybe I can somehow magically find it...

Though yeah... use the official help topic please.