Mr. Washer is the hobby shop owner who first appeared in Operation: D.O.G.F.I.G.H.T.. At first he appeared to be a friendly hobby shop manager, but it was discreetly shown the he was getting increasingly annoyed by customers in his store with chilli dogs from the nearby hot dog stand accidentally spitting on his counter.

As a result of his anger, he built an enormous old-style bomber plane, the Flying Fortress, which had the ability to drop an inifinite supply of refrigerators. He flew over the city and bombed it with refrigerators, before attempting to drop a giant refrigerator on the hot dog factory in the middle of the city. Before he could do that, however, his plan was foiled by Numbuh 2 and The Kid.