9/10 only for the sole reson I had a complaint:
The CounterCurse. What was is exactly? A saying of words? An item? Was is involved in the fight in any way? I watched the whole thing and I never saw any reference to a CounterCurse throughout the whole fight. If it were an item, it should've specified, because it now leaves me confused.
Other than that, great fight, alas with those camera shots that periodically amazed me.
The Counter Curse was a spoken spell. I can understand your confusion because it was kind of hidden. Anyway, at about 5:15 in Part 6, when Wario has The Darkness pinned to the ground, he says "Obscurem Absentis Humanis
." As Wii Master pointed out, the words are in Latin. It's hard to hear because the music is so loud, but if you go back and watch it again immediately after he says the spell you hear a ghost-like swish. This signifies the counter curse has worked, and that the Darkness is no longer immortal. Good question though!
That's not what I got in the translation. I got Darkness Absent Kindness.