Stage select
 
 Highlight the "Game Start" option, then press X + Circle + Left. If
 you entered the code correctly, the starting stage number will appear
 next to that option. 
 
 Four player mode
 
 When the warning appears on the opening screen, press Square +
 Triangle + Circle + X. Then, four players may play the game
 simultaneously. 
 
 One-hit kill
 
 Select Captain or Jennety as a character. Then, hold X + Circle, and
 press Special Move to execute a one-hit kill.