Wii MotionPlus being an expansion lead to issues with other expansions.

[ProfElements]

With Wii MotionPlus being a expansion, which is a union in libogc code It cant be used if any other expansion such as nunchucks to be used with MotionPlus even if part of the hardware.

[DacoTaco]

public note after some investigation :

• Only blocks extra expansions when motion plus is enabled (aka after a WPAD_SetMotionPlus(x, 1) )
• To implement them we will probably need to update wiiuse
• Even wiiuse doesn't seem to have all expansion pass-through implemented, but it doesn't look to be too hard : https://github.com/wiiuse/wiiuse/blob/master/src/motion_plus.c#L278
  can't test it on the wii though, since wiiuse & libogc's wiiuse have deviated a shit ton (sadly)