NOTE: Confirmation Message will appear if you entered the code correctly.

Level Select 
On the Main Menu, Enter: X, X, X, X, B, B, B, B, Y, Y, Y, Y, X, B, Y. 
Submitted by Wdude10391

More Boards
On the Main Menu, enter: UP, UP, LEFT, LEFT, RIGHT, RIGHT, DOWN, DOWN, UP, LEFT, RIGHT, 
DOWN, UP, LEFT, RIGHT, DOWN.
Submitted by Wdude10391

Unlock All Boarders
On the Main Menu, rotate the right analog stick clockwise fifteen times. 
Submitted by Wdude10391

Unlock Everything
On the Main Menu, enter: UP, DOWN, UP, DOWN, UP, DOWN, UP, DOWN, UP, DOWN, LEFT, RIGHT, 
LEFT, RIGHT, LEFT, RIGHT, LEFT, RIGHT, LEFT, RIGHT.