Tetrisphere [N64]

Secret Characters:
At the "New Name" screen press L, C-Right, C-Down

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.

Bonus music:
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.

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.

View credits:
Enter CREDITS as a name.

Unlock various levels:
Enter any of the names at the high score screen as your name to unlock all levels that player previously completed.

How to Beat the Crystal Tower:
Having trouble with the Crystal Tower level? And every time you try to break a piece near it, one side falls down and you lose, right? Well here's a way to stop all that. First, break other pieces untill you get a magic. Then, use the magic on the top of the Crystal Tower. Repeat until you've won.

Play as the champions:
Go to the options menu and then select "scores". look at the top scores for puzzle, time trial, hide and seek etc. then remember the highest score in any game mode and exit the "scores" menu. enter your name as the highest scorer's name on the new name screen and you can go to almost any level.

To view the ending instantly:
Beat the first stage under 5 min and go to 2 player mode. Exit that and your will see an extra mode. Click in it then type endless ending and you will see the ending.

Unlock various levels:
Enter any of the names at the high score screen as your name to unlock all levels that player previously completed.