This has always been one of my favorite SNES games.  So naturally (for me anyway), I just had to make an editor for it.  :-)  I chose to make it a save-state editor for ZSNES because it was the easiest way (no checksums to worry about, no compression, etc.).

Sorry the program took so long to get ready.  It wasn't quite as finished as I had thought. :-}  Anyway, here it is.  I haven't tried it under every conceivable game situation, so I'm not guaranteeing that it will work perfectly on everyone's machine.  That having been said, I've used it extensively myself, so I'd venture to say that it's pretty safe. :)  If you do happen to find any bugs, please let me know so I can fix them.
 
 

Secret of Mana - Save State Editor for ZSNES

Installation should be pretty easy.  Just unzip it into a directory of your choice and run it.

How to use it:

It's a bit complicated to explain here.  View the "ManaEdit.txt" file included in the download for details, or view it on-line here.
 

Click to Download (Version 1.2 - 245 KB)