Too bad I can't help... :/
But that's weird, VOOK. It should work...unless if you'e just starting on the Wii you need to start the game first and "unlock the option". Like play the game normally on Wii, then after you start put the other figurine as a co-op partner.
Online; aside people "happy to be playing this" haven't found much info about it. Maybe during the week when the "big sites" start posting their reviews and stuff.
And yep... Wii/PS3 is wireless, PC/360 is wired, 3DS is IR.