Dragon Quest III Cheats

To rename the Prince (2nd character) to whatever you want,
start the game up, then choose to Continue an Adventure. When you are at the ''file screen'', put the cursor to the left of the file you want to change the name.

Hold the directional pad to the Left and also hold the Start button and push the A button with them still held down. A naming prompt will then appear for you to enter in
the new name.

To change the name of the Princess (3rd character), put the cursor to the left of the file you want to change her name in, and this time hold Right on the directional pad along with the Start button, and then press the A button while still holding right+Start. A naming prompt will then appear for her.

You must have the Prince in the party for the code to change his name work, and the same for the Princess.