The absolute best tool for NES/Fami carts is a CopyNes mod.
I installed one of these a while ago on an extra NES I had lying around and was able to dump just about every weird thing I could throw at it. Some Konami VRC games can be weird but there are ways to do it. Some of my first youtube videos were about using it.
Understandable if you don’t have an extra NES lying around to mod for this purpose but so far it is the best tool I’ve used outside of the Analogue NT mini.