During gameplay, hold A and B. While holding them, you can then use the D-Pad to move anywhere on-screen. However, note that you can still be hurt, still grab power-ups, and still lose lives in this process. Particularly, you will lose a life if you go too far above or below the screen. It is also recommended to go off-screen to the left or to the right, or you can irreversibly glitch up the game to the point of needing to reset to fix it.