It's gotta be Hwoarang and Baek!!! They have some amazing double team moves and they are both good on their own, too!
Here are the reasons why you might have beat me on the PS2:
1.I suffered a massive heart attack and died.
2.I had to leave due to a family emergency.
3.I paused the game, but you played while I was gone.
4.I was too busy laughing at your sorry gaming techniques.
5.You put the controller in my hand while I was sleeping.
6.You were dreaming.