Mandark is a fictional character from the animated television series Dexter's Laboratory. He is portrayed as a rival to the main character, Dexter, who is a young boy genius. Mandark is known for his intelligence and his obsession with defeating Dexter, often using his own inventions and scientific knowledge to try to outsmart him. Mandark has a distinctive appearance, characterized by his tall, lanky frame, large glasses, and a unique hairstyle. He is often depicted as a villain, but his character also has humorous traits, making him a memorable part of the show. His interactions with Dexter and other characters contribute to the comedic elements of the series.