Fawfulcopter

Fawfulcopters are UFO-like enemies that appear in Mario and Luigi: Bowser's Inside Story. They resemble Fawful, and they have one top section with Fawful eyes, then a saucer bottom. Sometimes, a mouth will come out of the bottom on a rod and talk to Bowser. Bowser can inhale them and Mario and Luigi will fight them. They are fairly weak enemies without an attack, in the place of an attack, they will flash a red light, which summons more enemies when fighting with Bowser, unless he inhales them which will effectively disable that function.

Their name is most likely a reference to the internet slang term "Roflcopter".