Blood mode, realistic Mai:
Press A + D on controller one and B + C on controller two simultaneously at the high score screen. Press Start to begin game play.

Select winning pose:
Press A, B, or C after the last attack, before the pose sequence begins. If your character is the losing fighter, press A, B, or C on controller two at this time.

Alternate costume:
Press D when you selecting a team or fighter at the character selection screen.