It was published at Barks that Nintendo wii emits a frequency that is almost like a friendly talk with roaches. That this frequency is far more attractive than a piece of an old pizza.
If you have some doubts you can check some tips like the word Gokiburi (ゴキブリ) and the image of the wii. X)
Or if you want facts and proofs that I'm not lying... I make a search on internet about it, and i found some links of it at:
Search more about Wii and roaches here