TETRIS DX CHEAT CODES
Expert mode
INSTRUCTIONS
Press to pause your game, then press Select. The preview window will not show the next piece when game play resumes.
| CODE | EFFECT |
|---|
| Start |  Expert mode |
Reverse movement
INSTRUCTIONS
Hold while any piece except a straight bar or block is descending until it is against the wall. Then, keep holding Left or Right and rapidly tap A.
| CODE | EFFECT |
|---|
| Left or Right | Reverse movement |
Alternate screens
INSTRUCTIONS
Allow the game to remain at the main screen until demonstration mode begins. Press to display a screen featuring swimming fish. Press A to return to the next part of demonstration mode, then press A again to display a screen with confetti and the Nintendo logo. Press B to return to the next part of demonstration mode, then press B. Eventually a screen featuring a blackboard will appear.
| CODE | EFFECT |
|---|
| Select | Alternate screens |
In-game reset
INSTRUCTIONS
Press while playing the game.
| CODE | EFFECT |
|---|
| Start + Select + A + B | In-game reset |
Continue game play
INSTRUCTIONS
Press to pause your game in single player mode, and then turn off the Game Boy. A continue screen will appear when the Game Boy is turned on again.
| CODE | EFFECT |
|---|
| Start | Continue game play |
Screensaver
INSTRUCTIONS
Remain idle at the main menu for about 20 seconds. A demo game will begin. Press and remain idle for another 20 seconds. Fish will appear. If you repeat these steps, flying triangles will appear.
| CODE | EFFECT |
|---|
| A | Screensaver |