SUPER HANG-ON 
Cheat Menu 
When the title screen comes up, press A + B + C all at once. A new screen will come up with new options like Time adjustment, Game difficulty, a sound test, and an option to change some of the text to Japenese. Press Start to exit and play the game. 
Submitted by UltraSkuLL@aol.com 
Easy Money 
In normal mode, keep crashing until you have engine trouble or a broken windscreen. Start another race and you will be forced to retire. Hit B or C to return to the Options screen with an extra $400. Keep starting a race and retiring until you have as much cash as you need. 
Options 
On the title screen, hold A + B + C. An Options screen will appear that allows you to choose the difficulty, time limit, and language. A sound test item will also appear. 
View Ending 
To see the grand finale in Original mode, enter "GFF3F546F35564 FFOSLPIMFJEDGH" at the password screen. 
Note: This code doesn't work in the Triple Score version of the game.