So I learned how to make save states. This can be useful.
For example, I can now make an "unlockable" game. If a player scores a certain score, a game can be then unlocked and then it can save that it's been unlocked so you can go back to it even when you power the VB off and then turn it back on again. In order for this to work, the Virtual Boy cartridge would require a battery. I don't know how plentiful that would be or how feasible it would be to get cartridges made if they need batteri