In a Pi you do not emulate the wii neither with Dolphin nor with Whale
And for the Pi, it's best to use Raspbian lite, Attract-Mode and RetroArch. But forget about Dolphin. The Pi is not an F1. On the pi, nothing higher than Nintendo 64 will work properly for you.
I installed AM in Lakka, but i prefer Raspbian Lite + Attract-Mode, it goes better in Pi 3B+. If you follow Keil's tutorials it will be easy for you to do it.