I don't know how I ended up with this game. I think it was a present or something. I remember that when I first got it, I ignored it, but one day I got bored and decided to play it because I had ...

Hold A+B+Select while powering on the console. You'll be invulnerable while playing the game. At title screen, press and hold Right, A & B on the 2nd controller and press Start on the 1st controller.