King Arthur Pendragon was the disguise of Winston Pilkingstonshire.
Physical appearance[]
King Arthur is an adult male with black hair and beard. He wears a white short-sleeved tunic under a red vest with a gold shield on it, a dark gray cape, a black belt with a golden buckle, white leggings and brown shoes, with a golden crown and chain mane.
Personality[]
Arthur was shown to proud and arrogant at first, but he helpful and friendly at heart. During their confrontation with Morgan le Fay, Arthur has a cowardly side when he tried to fight her.
History[]
Scooby-Doo! The Sword and the Scoob[]

Winston Pilkingstonshire unmasked.
Winston Pikingtonshire was hired to take guise of King Arthur as part of the town's experience to make Mystery Inc. believe that they have travelled back in time, and he spends most of his time acting as the real Arthur.
Eventually, Velma soon learns the whole thing was a fake, and Arthur is really Winston Pikingtonshire, who previously acted as Thundarr the Barbarian.