> "Red Corsair" > Board has custom module, likely missing main program code, can't emulate
Yes, the main block of Z80 code is missing. I'm annoyed by this, too.
> "IQ Pipe", "Beauty Block" > protection makes no sense at all to me.
A lot of work has been done towards simulating the protection MCUs on Korean arcade games by SunA and Semicom; I don't think there have been any efforts to decap those so far. With Quiz Punch II, I made the lucky discovery that the MCU code was in an external ROM that had already been dumped. As for these two Korean quasi-bootlegs, I have no clue as to what the protection device could be yet; I hope it's nothing half as evil as a DS5002FP.