The Imp is a dummied enemy from Final Fantasy IV. It is a dark purple and red palette swap of the Gremlin and Mini Satana monsters, and has an intact attack script. Based on its stats, it was probably intended to be encountered on the surface of the Red Moon.
This monster's name was changed to Dummy in the English Super Nintendo and the Japanese Easy Type version. The Imp was deleted from the Complete Collection release and replaced with a distorted sprite using the Wii version graphics, just like numerous other cut enemies.
imp is "a small, mischievous devil or sprite."An