Many emulator enhancements have been made to RealityBoy within the last two years or so:
http://www.planetvb.com/modules/tech/?sec=emus&eid=rboy And Mednafen's VB support is actively being worked on:
http://www.planetvb.com/modules/tech/?s ... d=mednafenThe only cheats I know of were a part of the RedDragon package:
http://www.planetvb.com/modules/tech/in ... id=rdragon (The file "cheats.db" is a human-readable text file. I don't remember who hacked all of them, but I know I did the debug menu/stage select codes.)