Level skip:
Pause game play, hold A + B, then press Left, Left, Select.
Hidden picture:
Pause game play, hold Start, then press Right, A, Down, A, Right, B, Right, A.
Hidden picture 2:
Pause game play, hold Start, then press Select, A, Left, A, Down, Left, A, Select, Select.
Hidden picture 3:
Pause game play, hold Start, then press A, B, A, Down, Left, A, Down.
