From the Super Mario Wiki
Harrassimentia Phlyoverus is a class of enemies from in Super Mario World 2: Yoshi's Island. The name is a corruption of the word "harassment" combined with an etymographic misspelling of "fly over us". All members of this class have the ability to fly, often with wings, but in one case, with propeller hats. Enemies in this class include Goonies, Para-Koopas, Fangs and Fly Guys.