Complete Boss Mode with 5-star marks for each boss, including Fight All Bosses Mode Beat all bosses in Boss Mode and get a ranking with each, to unlock Emperor and Fight All Bosses Mode Beat Training Mission 1 - 8 on a difficulty of 2 stars.

Beat Training Mission 1 - 9 on a difficulty of 3 stars. Beat Original Mode with any difficulty (access after doing so by visiting the Options menu) Beat the game in Training Mode and Boss Mode Left, Left, Right, Right, Right, Left, Right, Start (on title screen)

In the room where you fight the Emperor, the last room to the left (shoot the door). Now you can see your score during the game. Press Left, Left, Right, Right, Right, Left, Right, StartĮnter this code at the title screen, if entered correctly a '0' will appear in the upper-left corner of the black screen before the game starts.