Mittens is a tabby kitten who appeared in "Catcalls". The Kennel Kittens brought her to Becky's brother (Who briefly renamed her "Stripe" despite the fact that she doesn't have any stripes), while the Pound Puppies brought Becky a puppy named Wagster. She was voiced by Eliza Guttman.
Mittens was first seen on her and Wagster's perfect person's front porch with Ace, Lucky and Wagster, asking Ace nervously if he and Lucky were going to fight. "You guys aren't gonna fight are you Ace?" Ace told her not to worry.