Crystalis runs really well in VirtuaNES. YS seems to as well, but I haven't played it that much. I played all the way through YS2 on Nesten, however.
> Is there an emulator out there that will play both of these
> correctly? Last time I tried with Ys, about an hour into my
> game it froze up no matter what I did, and crystalis just
> runs buggy as hell when I try it. Both of these were tried
> on FCEUltra a few months back.
>