Fawfulcopter

Fawfulcopters are UFO-like enemies that appear in Mario & 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.

Fawfulcopters will also appear during cutscenes when Bowser is being controlled. They mainly serve as messengers for Fawful when he is not present. They also appear in Peach's Castle and hold keys which open certain doors in the castle.

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