A good match for Duo?

Who in VG would give Duo from Mega Man 8 a good fight?

Some of his feats:

@1:56
2XGlc-9sYhA&feature=related

@1:48, @6:15 and @6:48
vn1tX9V1kB0&feature=related

Keep in mind I'm not asking for anyone who could stomp him but instead a fair match that could go either way.

I miss MM8, my first MM Game. I don't have a clue at the moment about the question.

Threads like this aren't allowed; read the rules.

Closed.