I've just received my Manbow 2 copy . Well, I am not able to run this game using VGA output on my 1chipMSX. This game only runs at 50 hz so it's impossible to play with it in a VGA monitor?
Manbow 2 indeed does not like the 1ChipMSX VGA mode, use composite or s-video mode, then it will work.
I can only comment on the default PLD that's loaded into the 1ChipMSX when you buy it though, maybe it works with any of the updates?