The Buzzerfly was originally created as a much smaller common Dream Eater before being reintroduced as a Dive Mode boss. During battle, the Buzzerfly would have sat in the eye of a needle and spun like a top.[1]
The Buzzerfly is a general hybrid of a butterfly and a bee. It is shorter and stubbier than the Queen Buzzerfly, with a simplified color scheme. It is almost owl-like in appearance, with a drill-like stinger and a plump abdomen.
^Kingdom Hearts 3D: Dream Drop Distance Ultimania, Mamoru Ohashi: "Of course, halfway through development, many Dream Eaters were cut, to my extreme sadness. Among them was Queen Buzzerfly, which began designed as a normal small-fry enemy and cut, but made a miraculous recovery as a Dive Mode boss, which is rare to have happen. By the way, when it was small-fry it attacked by sitting in the eye of a needle and spinning like a top." Translation via Goldpanner