I don't know if it's a running gag or Butch hartman being lazy but there were a shitload of evil twin/clone/doppelgangers in the show, and i've brought them all to you.
Because i actually went ahead and looked them up, here: -Kitty Katswell -Madame Catastrophe from The Doomies -Katty Katswell from A tale of two kitties -Agent Meow Meow from While the cats' away -The Hag of Haggis from Great Scott -Alien Kitty from Puppy Unplugged
