Tetris DX Cheats
Tetris DX cheats, and Codes for GBC.
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Hold Left until a piece touches the wall. Continue to hold d-pad Left and rapidly tap A. Alternately, hold Right and rapidly tap B. (Note: Cheat does not work on symmetrical pieces like the square and straight bar.)
Press Start to pause game. Then turn Game Boy off. When the unit is turned on again, a "Continue" screen will appear.
Press Select during demonstration mode to display an aquarium screen. Press A (x2) to return to demonstration mode then display a confetti screen. Press B (x2) to return to the demonstration mode then display a chalkboard.