Capcom vs. SNK 2/Secrets

Fight a Mid-Boss
To face off against Geese Howard, or M. Bison, you must satisfy all of the following conditions after your 4th match:
 * Have at least 800 Groove Points
 * Never get hit by more than 5 First Hits in any match
 * Complete at least 2 matches with a Custom Combo or Super Combo finish.

Fight a Boss
To fight against Akuma or Rugal, you must satisfy two of the following conditions by the end of the game:
 * Have at least 1000 Groove Points
 * Finish with at least 4 special KOs
 * Defeat M. Bison or Geese
 * Finish with at least 2 Level 3 Super Combo Finishes

Fight a Secret Boss
To fight against Shin Akuma or Ultimate Rugal, you must satisfy two of the following conditions: If you are successful, you will face off against Shin Akuma or Ultimate Rugal. The condition for who you are fighting depends on which groove you have chosen.
 * Have at least 1500 Groove Points
 * Defeat M. Bison or Geese
 * Get at least one Finest K.O.

Getting a Finest K.O.
To obtain a Finest K.O., satisfy one of the following:
 * 1) Counter a Super Combo attack with a Special Move
 * 2) Counter a Special Move with a Level 3/MAX Super Combo
 * 3) Counter a Super Combo with a Super Combo
 * 4) Finish an taunting opponent with a Level 3/MAX Super Combo