jzintvWii is the Wii port of Joe Zbiciak’s ‘jzintv’ Intellivision emulator.

Instructions:

Copy the application folder in the “apps” directory of the SD card
Create directory “/jzintvWii/roms” on the SD card
Put all your roms (.int, .bin, .itv or .rom) in that directory including bios roms (exec.bin, grom.bin and ecs.bin)
Boot the emulator from the Homebrew Channel
Follow instructions, or press the “A” button to play a rom

http://wiibrew.org/wiki/JzintvWii