Clean Pause Screen
     Pause gameplay and press X + Y.

Play as Rugal B
     At the Character Selection screen, hold Start and press X on Rugal.

Different Survival Mode
     Beat Survival Mode once, then highlight Survival Mode, hold Start
and press A.

Teammate Assistance
     While  selecting  the  fighting  order,  hold  B. Then during the
fight, if you character gets stunned, hold X + Y + A.