Super Mario Kart > Codes > Bugs & Glitches

Unidentified Flying Balloons
In Battle Course 2, if you jump out of the course and get picked up by Lakitu, you will disappear from your opponents screen except for your balloons.

Never Ending
In Battle Mode, hold the gas before, during, and after you lose your last balloon. Sometimes you will be able to continue driving around collecting blocks. Make sure you keep holding the gas! If you inadvertently press a button, you will get the menu, but you'll still be able to drive around until you press another button. If you get a Star, use it; after the star music stops, the regular battle music returns. If you get a Red Shell, fire it at your opponent, and it'll spin circles around him.

Turn Off Music
In any two-player game, after the green light, on any controller repeatedly and quickly press the Start Button until the music turns off. This may take a while, and I haven't got it to work in any one-player games.
-- Found by Deezer