SD64CT II: 1st round (lost to Giga Bowser)
He's one of two Xbox represenatives. With Xbox haters and Giga Bowser, Master Chief is already doomed.
Comments
"It's not the Xbox haters that kill Master Chief, but more likely his two opponents, Shadow and Giga Bowser. He can't get through them."
~Super Smash Fan
"An X-Box character? In a tournament? On a GameCube forum? The perfect road to destruction!"
~ajc_11us