What Nigoli means is if you follow the GGGuy readme you can patch the codes to the game itself, but if they do not work for you then it must be the device your using as all added folder roms used that exact guide step by step, so I can't imagine it was useless patching them years ago that took me days on end to check each and every one of them. I can guarantee they all worked when I played them 7 years ago I even listed it in the readme file I uploaded too.
*And that wasn't until I played each and every one of them for a few minutes or so on my Super Card SD device back a few years back when the device still worked for me at the time*
Again the vast majority of your hacks work (and thanks a lot for that) but for Parodius Da!, the hack is just broken with the following
symptoms.
Hence why I would like a fixed / proper hack for this title.