The cat seems to be linked to Claw's personality, as whenever claw is happy MAD Cat will purr, but whenever he is mad he will hiss and yowl and this is his signature sound at the end of every episode. After Dr Claw says "I'll Get you next time Gadget. Next time." MAD Cats yowls. In the series his breed is unknown, but in the film he is a white persian like Mr. Tinkles. mad knows about penny and her watch and sent the evil female troll in blue to defeat and destroy penny's watch as mad is a female herself mad cat saw penny and started to claw off penny's watch penny saw her beautiful watch in the paws of evil and she ran away