"Cat Skye" is not an official name yet. It may have been referenced in the storyline as such, but has not been officially named. Alternatively, it may be a name popular among fans, but has no official basis.
Like the rest of the Kitten Catastrophe Crew, Cat Skye was introduced as the "evil twin" of the PAW Patrol.
Personality
She's just as naughty and antagonistic as the rest of the KCC. She has no qualms with abandoning Mayor Humdinger when things are going wrong.
Appearance
Cat Skye looks nearly identical to the actual Skye in terms of fur color and spots. She also wears the same uniform as Skye. However, she has brown eyes as opposed to the pinkish-purple eyes of her pup counterpart and a big bushy tail.