Hidden Copyright Screen
In-game during the player's move on the second controller, press the sequence A, A, B, Right, A, Left, B, Down, A, and Up.
Select Any Tile
At the opponent selection screen, enter the following sequence - A, A, B, Right, A, Left, B, Down, A, Up. Then choose your opponent. During the game from then on, you can manipulate the tile that you draw. First draw the tile, which will always be a "1" in the Chinese character set if you did it right. Hold A and use Up/Down on the D-Pad to change the tiles.
Slideshow
At the opponent selection screen, hold Select + Start on controller 2 and Select on controller 1 at the same time, then press Start on controller 1.
