To clarify since Obi didn't go into detail XD
- The first option is the Wiimote + Nunchaku.
- The second is the GameCube controller which you can use for your GameCube games you want to play on your Wii.
- The third is the Classic Controller, which is primarily used for Virtual Console games but can be used for GameCube games and selected Wii games if they want to use it.