The Black Knight Ghost, believed to be a haunted suit of armour, was Mystery Inc.'s first and most memorable case.
Though the costume in the Coolsonian Criminology Museum looked like a plain suit of armor, the live suit of armor is actually black, with very detailed, intricate carving. Green mist floats out from the eye holes and other small holes.
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Powers and abilities
He has a powerful sword that can be used even without holding on to it.
Jeremiah Wickles did illegal acts dressed as the Black Knight Ghost.
Scooby-Doo 2: Monsters Unleashed
He was the second monster to be brought to life, along with the 10,000-Volt Ghost and sneaked into Old Man Wickles' manor to await Mystery Inc.'s arrival. Shaggy and Scooby were barricading the door, but the Knight got into a secret passage way and he attacked them. Fred arrived with a shield and called the Knight "metal-head" and to "bring it". The Black Knight smashed Fred five times and Fred fainted in pain saying 'yep, he brought it'.