Mahjang Companion

At girl select screen, press A, A, B, Right, A, Left, B, Down, A, Up, then select any girl and start the game. From now on, by pressing the A Button you will be able to select any mahjong tile to add to your pool.

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.