Mr. Tinkles is the main antagonist of Cats & Dogs. Don't be fooled by his name! He is a selfish, cruel, ruthless, pompous cat who has a hatred of dogs and will stop at nothing to make people everywhere be allergic to dogs.
Mr. Tinkles first appeared when he and his henchman were discussing about the dog being out of the way. To break in the lab and prevent the anti-allergy dog formula from being created, he sent in cat ninjas and later the Russian. After both adversaries failed, the formula was eventually completed.