Implementing emulated wiimote will be fairy easy and is already partially done. The issue is more the UI for setting up the on screen buttons.
There's also some terrible hacking that can be done to allow real Wiimote to work on Android versions >=4.2, just requires root and some special handling on Dolphin's end.
There's also some terrible hacking that can be done to allow real Wiimote to work on Android versions >=4.2, just requires root and some special handling on Dolphin's end.