When he's captured by a demon butcher who'd like to convert him into cat meat...
The Twisted Tales of Felix the Cat
Season 1 Episode 4: The Sludge King
Felix travels to an animation studio, where he sees himself in computer-animated form and meets Candy Kitty, the beautiful sister of his dopey pal Roscoe. When Roscoe falls into a manhole and meets the Sludge King and his bizarre minions, Felix decides to impress the girl by saving her brother.