The Wii in TheFeed's heavily armed compounded is covered in roaches, but we like it that way, so it's okay. But the (probably ridiculous) rumor-of-the-day is that a powered-on Wii emits a sound which cockroaches absolutely love. It draws them like flies...or roaches, really.
So when you're playing Metroid, don't be surprised if a bunch of ugly roaches want to play as well.
Of course, the source of this rumor, Japanese site BARKS, by way of destructoid, is highly dubious, and it seems totally silly, but still, it would make a good excuse for your poor housekeeping skills, eh? You could just be like, "The roaches are attracted to the sound of the Wii, not the half-eaten pizza that's been on the floor since last week!"