Enter G[Alien head]MEBOY as a name. Note: press L + C-Right + C-Down to enter the special character in the name. Enter the audio screen to access nine additional songs.
Codes
Key these characters in at the New Name entry screen.
Level select
Enter [Saturn][Spaceship][Rocket][Heart][Skull] as a name. Note: press L + C-Right + C-Down to enter the special characters in the name. Any level in any game mode may be accessed.
Lines mini-game
Enter LINES as a name. The object of the game is to remove an area large enough to released the trapped character. Line up three pieces in a horizontal or vertical line to remove them.
Secret Characters
Push L, C right, C down.
View credits
Enter CREDITS as a name.
View vortex sequence
Enter VORTEX as a name. Hold the reset button. A sequence showing all robots being sucked into a vortex will be displayed after several seconds. Release the reset button to end the display.
Bonus music...