If they couldn't do it, they couldn't do it. Shiggy himself said it couldn't be done, not that they simply chose not to.
I don't imagine he would lie, and in the process of lying make the Wii look bad (by lying in saying that it is too weak to do so, which is what he said), it would have been much easier for him to have said "we didn't think it would fit" and go away
Either way, i don't really care, since i won't be doing co-op much period, except for the things that absolutely require it to get (in which case i could wait to get those things, like star coins and such, until my roommate or some friends are available to help)
Monster Hunter: pissing me off since 2010.