Mostar the Fear Monster

Mostar is a fan-made character by MarioFan65. He is the fear monster and the father of Antasma. He live in the Nightmare World, raising Antasma as a baby before heading to Pi'illo Island. He was killed by most Pi'illos before his son turned evil on feding on most nightmares.

Trivia

 * He is most likely the evilest nightmare to exist on the Dream World.