Tetris DX Cheats - GameBoy Color
Primary Collection of Cheats
Expert mode
Press [Start] to pause game play, then press [Select]. The preview window will not show the next piece when game play resumes.
Reverse movement
Hold [Left] or [Right] 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].
Alternate screens
Allow the game to remain at the main screen until demonstration mode begins. Press [Select] 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.
In-game reset
Press [Start] + [Select] + [A] + [B] during game play.
Continue game play
Press [Start] to pause game play in single player mode, then turn off the Game Boy. A continue screen will appear when the Game Boy is turned on again.
Screensaver
Remain idle at the main menu for about 20 seconds. A demo game will begin. Press [A] and remain idle for another 20 seconds. Fish will appear. If you repeat these steps, flying triangles will appear.