Extra life
Hold Start and press Down, Up, Left(2), A, Right, Down during game play.
Extra time and energy
Hold Start and press B, A, Right(2), A, C, Up, Down, A during game play.
Full time and energy
Hold Start and press Right, A, Down, A, Right, B, Left, Up, Right during game play.
Stage and level skip
Pause game play and press C, Right, A, B(2), A, Left(2), A, Right, Down. Resume game play. Pause game play again and press Up to jump to the next stage or Right to jump to the next level.
Brighter pause screen...