Capcom explains why there is no Wii version of Mega Man Universe

Mega Man Universe was unveiled a few months ago, but unlike Mega Man 9/10, a Wii version was not announced. Since then, quite a number of gamers have been wondering why the title won’t be making its way to Nintendo’s console. Well, as it turns out, a filesize restriction has prevented Universe from coming to the Wii Shop Channel. A representative at PAX confirmed that even though Capcom was hoping to make a Wii version, the company simply couldn’t do so at this time because it would be too big for WiiWare.

Source