Serenade is in the Secret Area 3, up the gigantic slope. You'll also need all 200 standard chips. Equipping the Collect program is probably a good idea.
No, it's not.
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
hospital
you get it from a guy in secret area 1
yes he is in the space core at dealer base
you cant
Oh boy. Search Megaman Battlenetwork 3 White ROM on Google and you'll get enough hits on the first page to download at least 3. But don't ask that question. Please.
Talk to Tora (either in the DNN building or at Wily's Base) to fight KingMan Alpha. Delete KingMan Alpha to get the KingMan v2 chip.
you cant it just happens if you fight a warning virus or big viruses
you go to acdc
If you mean how to fight the Omega-Xis copys, you will have to fight with them in Natl WAZA HQ before battling Queen Virgo 3 times.
my best guess is to keep fighting till you style change into it I would suppose that you would fight with grass chips like bamboo sword, spices ropes, boomers, etc. But fight with grass attribute chips.