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Dr. Frank Sloth is a villain in the Neopets franchise. He is regarded as the most feared character in all of Neopia. Dr. Sloth is an insane and evil scientist bent on conquering Neopia and enslaving the Neopets there. In his first attempt long ago, he was narrowly defeated by the Space Faerie. Sloth is best known for enslaving an entire race of alien creatures called Grundos and turning them into stronger monsters to draft his army. When it comes to his arsenal, Dr. Sloth has a vast amount of technological resources at his disposal, including evil robots, spaceships, killer clones, and ancient artifacts of destruction.