Mega Man 8-Bit Deathmatch (V6A) - Duo, King and Evil Energy Robot (Buster Only)

Watch the video first. You'll see how I managed EER.

It's laughable how bad the Arrow Buster is at dealing with Duo. You're better off NOT using it.
King is surprisingly more difficult without weapons, however. Especially now that I can't use the Copy Vision to cheese the first phase.