Hunt for Red October

Level skip:
Pause game play and press A, B, Select, Right, Left(2), Right, Select, B, A, B(2), A. Note: This can only be done once per game.

Power-up:
Pause game play and press A, B, Select, A, B, Select, A, B, Select, A, B, Select, A, B, Select, A, B, Select.