(02-24-2014, 08:07 AM)chunter Wrote: I attached a picture. So, whatever you select for the extension is what type of controller it will use?
Yup, it's that easy.
(02-24-2014, 08:07 AM)chunter Wrote: Is there a way to set different extensions for different games? So, when I click on mario galaxy it just loads nunchuck extension and when I click on smash bros it automatically loads the classic extension?
You'll have to set it through .ini game config files. Have a look at this thread: https://forums.dolphin-emu.org/Thread-unofficial-howto-using-gameini-settings-per-game Specifically, the "Choosing Control Profiles per game" section. You'll need to make two profiles for what you want to do (one for the Nunchuk and another for the Classic Controller) and then reference them in each game's .ini file as described in the thread I linked to.

