While Ringtail was possessed by MadKat, he gained the ability to warp reality and do virtually anything he wanted. He was voiced by late Roddy McDowall in the original English version and by Mizuho Suzuki in the Japanese dub. This character is loosely based on television comedian Jay Leno and comedian Lenny Bruce, as a rival to David Litterbin (Letterman), and even has a catchphrase ('Here's Ringtail') spoken just like 'Jay Leno' on The Tonight Show.

He appeared only in SWAT Kats: The Radical Squadron Season 1 Episode 12:'Enter the Madkat'.

Lenny was guest-starred on the David Litterbin show to promote his bestselling book Madkat and Me. After T-Bone destroys Madkat by hitting his weak spot, Ringtail's sanity and career were restored after he is knocked out by Commander Feral and Razor. If you disagree with its deletion, please explain why at Category talk:Candidates for deletion or improve the page and remove the (This supports the possibility that Queen Callista may be an ancestor of Callie, and Tabor the Knight may be an ancestor of Commander Feral).

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