Dolphin Emulator is a video game emulator available for multiple operating systems. If you know how to use Dolphin Emulator, you can play classic GameCube and Nintendo Wii games on your computer or even your smartphone.
Dolphin Emulator is an open source program, which means that anyone can download it and contribute to the source code. Visit the official Dolphin Emulator website to download Dolphin for your operating system. You can choose between the stable version or the development version. The development version gives you access to the latest new features and updates, but it is not guaranteed that they will work properly.
You will need your own ROMs in ISO format to play GameCube and Wii games. If you have a physical copy of a game, you can rip the CD to your computer. Another option is to download ROMs from torrent sites.
Not all games are compatible with Dolphin Emulator. The Dolphin Wiki contains information about compatibility issues and various improvements.