Killer Kitty of the Caskervilles

The Killer Kitty of the Caskervilles is a small, orange kitten apparently owned by the famous detective Herlock Solmes, who keeps the Killer Kitty of the Caskervilles in a small cage in his home on Bonkers Street.

The Killer Kitty of the Caskervilles is seen only near the end of The Super Mario Bros. Super Show! episode "The Adventures of Sherlock Mario", in which Mario, believing the carrying case the Killer Kitty of the Caskervilles is kept in to be a lunchbox, reaches into it and is bitten on the hand by the Killer Kitty of the Caskervilles. Unable to get the Killer Kitty of the Caskervilles off his hand, Mario has to rely on Herlock Solmes, Luigi, Toad and Princess Toadstool to pull the Killer Kitty of the Caskervilles off his hand for him.

Trivia

 * The Killer Kitty of the Caskervilles is an apparent parody of the novel The Hound of the Baskervilles, a book written by Sir Arthur Conan Doyle.