Mr Wilson smirked under the mask, the Abyuser Sinbag Costume never failed! Since yukkuri learned about Halloween, they would year after yeary bother people demmanding sweets-sweets or try to take advantage of the Mr Humans giving sweets to their little ones as a way to invade their homes. Mr Wilson had enough of that, and came out with a good plan to scare away the scum yukkuris, and it wasn't only brilliant but also fitting for the season!
Of course, from time to time Mr Wilson had to explain the situation to pet yu owners before any misunderstanding raised, but overall everybody knew of Mr Wilson's "Halloween Anti Scum Method".