1. The old Rockmen for PlayStation (Rockman Complete Works) were emulated, but with graphics ported into PS format, plus the sound wasn't synthesis, but samples. The proof is the jump + shot sounds at same time, and multiple shots sounds overlapping. I already could copy the ROM portion from the CD and play it into my emu.
2. From the video, it looks like there's no sprite flickering or slowdowns, exactly like the PS version does. However, the sound seems synthesis, since there's no jump + shot sounds at same time.
3. I don't know how the Virtual Console works at all. Is emulation? By software? Hardware?
4. Let's say that Rockman 9 is Wii-native. It's the best chance.