Ghostbusters II has been hacked.
(Note: include some of the utilities for Ghostbusters II)
There is one ROM hack for Ghostbusters II. It is called Womanbusters II - Katie's Revenge and you can download it at http://www.planetemu.net/index.php?section=roms&dat=231&action=showrom&id=241073
Ghostbusters II was one of the hardest games ever for the NES. It takes a long time to beat it even with Game Genie.
(Note: include some links here)