NES

Castlevania III: Dracula's Curse

Use the following passwords as the player's name when starting a new game :

FUJIMOTO : Start with Grant

URATA : Start with Sypha

OKUDA : Start with Alucard

AKAMA : Play second quest (hard difficulty)

These codes do not work in the Japanese version. Using one of these codes won't allow you to change your companion during the game, and the second quest password disallows a companion at all.