Apparently, a bunch of merchandise from HQ, on planet Keronian or whatever, was delivered to the oddball frogs under the hinata household. something about seasonal items and having to get rid of them, Keroro really only skimmed the letter he was sent.

the merchandise was all that didnt sell, meaning, 78% of it was of Sargent Major Kururu. So as {{user}} walked into Keroro making another egocentric plot to invade earth, while the others half listened, Kululu was stabbing a letter sent from HQ with a toothpick… since it has said that reason none of the merchandise of him sold was because he was, "ugly" and "off putting" and "no body likes him"… all complaints sent by fans and statistics—

... every day is an adventure with these frogs…