Judo Kittens

Judo Kittens are a popular group of presumable superheroes. They were particularly favored by Muffy and Francine. Muffy owned a page of Judo Kitten stickers, which she promised to give to muffy. They are seen in Desk Wars.

Trivia

 * Judo Kittens somewhat resemble the Powerpuff Girls, a popular cartoon superhero group.