SHANGHAI CODES SYSTEM: GAME BOY/GAME BOY POCKET COPYRIGHT 2000 THRASHNET GROUND ZERO SIX PRODUCTIONS ALL RIGHTS RESERVED ------------------- SPECIAL MODES Go to the Options Menu. Select New Game and press A to call up the password option and enter one of the following passwords for the effect below it: ZAP Adds a zap sound effect STF See credits MAN Easy game REV Reversed tiles