Mahjong Academy is another entry in Sachen's unique genre of "Play rigged, unforgiving mahjong and see naked women" games.
Hidden Copyright Screen
On the player's turn, press A, A, B, Right, A, Left, B, Down, A, Up on Controller 2. The text reads 聖謙出品 (Thin Chen Publishing).
On the opponent selection screen, hold Select on Controller 1 and Select + Start on Controller 2, and then press Start on Controller 1.