I don't have this game so it's pretty much untested in Wiimote Netplay.
If you have any other games that you both have, can you try doing netplay in them and seeing if they work properly? If they do, that means this game needs to be looked at in particular.
If you have any other games that you both have, can you try doing netplay in them and seeing if they work properly? If they do, that means this game needs to be looked at in particular.