Sonic and the Black Knight [WII]

[Bankai]

I wanna play Sonic and the Black Knight on dolphin but as it is now it doesn't respond to my GC controller buttons, so i have to play with the Wiimote buttons, but when i do that they say i need a Nunchuck. Is there any way to play it with the GC controller buttons or to let it think i have a wiimote with nunchuck, when i actualy play with the keyboard?