Shannon Lucas

Shannon Lucas is the main antagonist of the 2015 direct-to-video Scooby-Doo movie, Scooby-Doo Moon Monster Madness. She is an astronaut who dressed up like an Alien on the moon to make people on earth believe space travel isn't safe. In the process, she almost permantally destroyed Daphne Blake's friendship with Velma Dinkley.

Role in the movie
Shannon was first seen during the Celebrity Heat News broadcast. She later welcomes Daphne, Velma and the Mystery Inc. boys onto Sly Baron's spaceship and commented on their nice spacesuits and their results on the space test they took, claiming Daphne's score to be the highest, much to Velma's jealously. Once in space, she used her alien costume to damage the ship, causing to land on Sly's resort on the dark side of the moon. She then terrorized Scooby-Doo and Shaggy Rogers with her alien costume. Eventually she was caught by one of Fred Jones' traps and unmasked. She then told the gang her evil plan and says that she messed up the tests and said Shaggy is really the one who scored the highest; much to the sock of Velma and everyone else. She then left them all to die, due to the explosives she hid on the resort, and heads back earth alone. However the gang escapes with a second spaceship made Sly's brother, who was there on the moon a long time and the heroes confront Shannon and she is taken to prison.