Along with the dog, panda, monkey, and rabbit, the cat can be bought in the store under the pets tab. The cat costs 299 Coins, so everyone can buy a feline friend.
Every pet has a special ability: the dog has an explosive bone, the monkey can walk on walls, the rabbit can leap into the air, and the panda has a super punch. The cat's ability is scratch, which like the panda, can deal some serious damage at close range. A direct hit will do 350 damage.
So jump into Wild Ones to buy a cat. Be sure to choose good colors and deck him out with awesome gear.