"The long awaited Dolphin 5.0 release is finally here! After nearly a year of bug-hunting and handling the release process, everything has come together for our biggest release yet! The three previous releases followed a very distinct pattern: sacrifice performance, hacks, and features in exchange for higher accuracy. As such, Dolphin 3.0, 3.5, and 4.0 progressively grew slower. But thanks to the cleanups put forward throughout those releases, Dolphin 5.0 is the fastest Dolphin has ever been!
By removing all of those hacks and outdated features while cleaning up the codebase, Dolphin has reached a new level of efficiency, powered by a revitalized dynamic recompiler. On the GPU side, OpenGL and D3D11 have seen tons of optimizations and accuracy improvements, and have been joined by a brand new D3D12 backend for huge performance gains. If there's a CPU or GPU extension that can make Dolphin faster, we take advantage of it."
https://dolphin-emu.org/

I've heard really great things about this. It's very easy to set up a Wiimote on your PC as well, with one of the cheap sensor bar replacements you can get at Gamestop in the bargain bin. That sensor doesn't need to be plugged in, just powered. The Wiimote itself is what sends the data back to the Wii or PC, so the battery powered ones work fine.
I just realized that was ambiguous: I meant that I've heard great things about the 5.0 release. I've used Dolphin in the past and it was already great!
Yeah, I need to get one of those battery powered sensor bars.