Ace is (voiced by Eric McCormack) the leader of the Kennel Kittens, similar to Lucky. He also shares Lucky's dedication and optimism. He is a Siberian. Ace first appeared in "Catcalls", where they and the Pound Puppies had brought adoptees to the same home. With one parent despising cats and the other hating dogs, the two groups went to extreme measures to prove which was best, resulting in the destruction of the family's living room, and the parents deciding to return both pets. Realizing the error of their ways, the two sides work together to ensure the puppy and kitten could stay. When the job is done, they start fighting each other after Ace spits at Lucky.