Enter the "Marathon" option at the main menu, then hold L and press Select.
Enter the Marathon screen and select the "Popular" option to play the
classic version of Tetris. Note: L and R will move the piece left and right.
When you go to the screen after you select "Popular mode" but before you
actually start playing, press L + R + A. You will enter the original game
without the music, but you still have sound effects. Note: When the game
ends, the screen freezes requiring the Game Boy Advance to be turned off.
Control starting screen:
At the main screen, you will see a "universe" spinning. Hold R to make it
spin very fast. Hold L to make it stop, then rotate in the opposite