All modes and characters:
Hold A + B and press L, R(2), L(2), Up(2), R at the main menu. Note: You may
need to repeat this two or three times before it activates.
Press L, R, or Start at the character selection screen.
Press R at the versus screen in tag team mode.
Fight as Heihachi:
Successfully complete the game with all nine characters. Heihachi will appear
next to Hworang and Paul at the character selection screen.
Team battle modes:
Successfully complete arcade mode as Heihachi to unlock the and Versus Team