Another world
Press X, Left, Right, Left, X at the title screen. The sound of a cheer or moan will confirm correct code entry.
All characters
Press Right(2), X, Left(2) at the title screen. The sound of a cheer or moan will confirm correct code entry.
Tarot reading
Press Up, X, Down, X, Up at the title screen. The sound of a cheer or moan will confirm correct code entry.
Talk demo
Enable the "All characters" and "Tarot reading" codes. Then, press X, Up, Left, Down, Right, Up, X, Down, Left, Up, Right, Down + X at the title screen. The sound of a cheer or moan will confirm correct code entry.