Capcom vs. SNK 2 EO - Platform: XBox

Hidden Bosses:
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Hidden Bosses can be used once they have been defeated. The conditions of the 
Bosses to appear are to fulfill two out of the following three conditions. If 
you play with a Capcom groove you will get Ultimate Rugal, and if you play with 
a SNK groove you will get Shin Akuma.

Achieve over 1500 GPS by the end of the game. 
Defeat the Middle Boss (Geese or Bison/Vega). 
Achieve at least one Finest KO. 

Custom Grooves:
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The Custom Groove option appears once a normal Boss has been defeated (normal 
Akuma or Rugal). Normal Bosses appear by fulfilling two of the four following 
conditions:
  Achieve over 1000 GPS by the end of the game. 
  Achieve four or more special KOs. 
  Middle Boss has appeared. 
  Achieve two or more LV3 super combo KOs. 

Middle Boss conditions:
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The middle Boss appears when the following conditions are all fulfilled:
  No time over has occurred. 
  The CPU has not made over six "first attacks". 
  The CPU has not made three or more Special KOs. 

Random Groove:
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At the Groove selection screen, press Start.