I just came across this crazy Castlevania 2 re-translation/enhancement patch that add many extra feature to the game and was blown away by the extent of the hack. You guys should really check it out, you can even generate custom patch with the feature you like directly from a form on the programmer's website. Among the extra feature added are a very useful in-game map, battery backed ram and even give you the ability to run the game off 7 different mapper of your choice. It's even compatible with the USA/PAL/JAP version of the game. Many other features were added, you should check out the full changelog, it's simply unbelievable all the hacking that must have been required to do all those things.
http://bisqwit.iki.fi/cv2fin/
Hat's off to that guy!
http://bisqwit.iki.fi/cv2fin/
Hat's off to that guy!