Mario vs. Bowser - 81.44%
Ike vs. Black Knight - 57.21%
Kirby vs. Meta Knight - 54.67%
Sonic the Hedgehog vs. Dr. Robotnik - 67.78%
Mega Man X vs. Zero - 69.91%
Bartz Klauser vs. Gilgamesh - 59.55%
Donkey Kong vs. King K. Rool - 52.01%
Sub-Zero vs. Scorpion - 56.64%
Pokemon Trainer Red vs. Pokemon Trainer Blue - 66.66%
Luigi vs. Waluigi - 58.81%
Ryu vs. Ken - 72.88%
Fox McCloud vs. Wolf O'Donnell - 54.55%
Samus Aran vs. Ridley - 76.55%
Terra Branford vs. Kefka Palazzo - 59.44%
Chris Redfield vs. Albert Wesker - 61.11%
Big Boss vs. The Boss - 57.73%
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Praise the Black Turtle, Game of the Decade Guru Champ.
(Well, I never promised creativity, did I?!)