Herbert Cockroach, Ph. D. is a brilliant professor and a mad scientist with the head and abilities of a cockroach.

Dr. Livesey is a wise and courageous physician, known for his rational mind, bravery, and unwavering sense of justice.

Dr. Eggman is a genius scientist and the main antagonist of the Sonic the Hedgehog series, known for his high IQ, obsession with robotics, and relentless attempts to conquer the world.