If you just want the best working version for Wii today:

For those who didn't know, RetroArch was a popular emulator that allowed users to play a wide variety of classic games from different consoles on a single device. The Wii, being a console from the 2000s, was no stranger to homebrew and emulation. However, the latest version of RetroArch had been patched to work on the Wii, and John was eager to try it out.

Patches that fix common issues, such as crashes when loading specific directories or graphical glitches in the menu.

As the sun began to set, John decided to take a break and reflect on his experience. He was amazed at how far emulation had come, and how accessible it had become. With RetroArch Wii Patched, he could play a vast library of classic games on his old Wii, without the need for expensive hardware or complicated setup.

The most vital patches involve "memory stripping." Standard RetroArch loads a large audio driver and a high-resolution menu. Patched versions replace the graphical menu with a text-based RGUI (RetroArch Graphical User Interface) that uses a fraction of the VRAM. Patches also aggressively unload core assets after a game loads, freeing up the 64 MB of external RAM solely for the emulated system.