All remotes:
Create the following arrows on the password screen by holding the first button, then pressing the second button that is indicated. [B + Down] twenty times, B + Up, A + Right, [A + Left] two times, [B + Down] two times, B + Right, A + Right.
256 lives:
Hold A and press Right(28) to create arrows at the password screen that will result in 256 lives.
