During gameplay, hold Up and A on Player 1's controller and Up on Player 2's controller. Press B on Player 1's controller for infinite bubble bombs.
Infinite Lives
During gameplay, hold Up and A on Player 1's controller and Up on Player 2's controller. Hold A and Select on Player 1's controller to earn infinite lives.
Level Skip
During gameplay, hold Up and A on Player 1's controller and Up on Player 2's controller. Hold B and Select on Player 1's controller to skip the current level.