https://dolphin-emu.org/download/

Try using the latest development build (after attempting the above), I don't notice any oddities with the Wiimote's functionality there

(also, minor quip [and pet peeve], but I can never get over it when someone links the dolphin-emulator.com site.. It's not the official one and the versions of dolphin they host are horridly out of date [well, I could say the same for the entire site..]. I know it's a pointless thing, but I'll be damned if half the issues people have are due to using the versions of dolphin from there just being so outdated)