You can use a smartphone as a wiimote:
https://forums.dolphin-emu.org/Thread-udpwii-for-android-controidpad
https://forums.dolphin-emu.org/Thread-udpwii-for-android-dolphinmote
https://forums.dolphin-emu.org/Thread-udpwii-for-android-controidpad
https://forums.dolphin-emu.org/Thread-udpwii-for-android-dolphinmote
