Wii64 is a port of the Mupen64, a very famous multi-OS N64 emulator to the Gamecube and Nintendo Wii through the libOGC library. The emulator achieves its full-speed emulation by the use of dynamic recompilation of the N64 machine code into PowerPC machine code combined with full hardware accelerated graphics. The emulator is in beta stage right now and is able to run several N64 ROMs at almost full speed.
There are many controllers for this emulator like Classic controllers, GC controllers and Wiimotes having Nunchuks. If you want more details on the controls, check out the included readme file. ROMs and saves can be loaded from a FAT formatted USB or SD (readme includes details on the required folders).
Wii64 :: Nintendo 64 Emulator for Wii
Wii USB Loader
Download Wii ISO
Dolphin Wii Emulator