Finally I got nullDC working with my Trio Linker Plus II.
I couldn't believe how buttery smooth it was on PC.
Shenmue definitely plays better on the emulator.
When I was playing it on my DC the input of the controls were delayed and not a smooth. Man o man nullDC is great.
Here is a screenshot of it on 1080P on my PC.
Here's another picture of my Japanese DC region modded playing the Undubed version of Shenmue!