In the title screen, highlight New game and press A, B, Y and X on the controller at the same time. You will hear "Ya ta!" upon doing so, indicating you've done it right.
Effect Code Hard Mode A+B+X+Y at title screen
Contributed By: Omata SSK Korosu.
Alternate Ending Theme
Beat the game, and before the credits start, hold down the R and L buttons and release after the credits appear. You will hear "Tomorrow is a Holiday," the other ending instead of the normal credits theme.
Contributed By: agumike.
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