Pause game, then press A, Right + B, Down + Left + R, Y + C + Z
20 Lives
Pause the game and press and hold X, B, Z. Release and then press and hold L,L, Down, Y. Unpause the game.
99 Lives
Pause the game. Hold L. Release then press and hold A, C. Release then press and hold Z, L, R. Release then press and hold X, Z, Down. Unpause.
Extra Continues
At the Game Over screen, press Up, Down, Right, Left
Infinite Continues (NOTE: Must have less than 3 continues)
Pause the game. Press and hold R, Left, Up, Right, C, B. Release then press and hold R, L. Unpause the game.
Restore Energy