Virtual Console is a service created by Nintendo that allows users to purchase and emulate games.
Games played through Virtual Console are usually free of accuracy issues.
In terms of functionality, the Virtual Console emulator is very bare-bones compared to unofficial emulators.
Pricing of Virtual Console games can be ludicrous. If you don't want to pay for VC ROMs on your Wii, you can just install them as .wad files through WAD Manager.
|Nintendo Entertainment System (Famicom)|
|Sega Master System|
Super Nintendo Entertainment System (Super Famicon)
|Mega Drive / Genesis|
|Game Boy Color|
|Game Boy Advance|