Cat R. Waul is the main antagonist of An American Tail: Fievel Goes West, the first sequel to the classic, An American Tail.
He was voiced by John Cleese in his first voice-acting role.
Waul is an evil, greedy, devious, conceited, manipulative, but ingenious feline criminal, who pretended to be the champion of a "brave new world" where cats and mice would peacefully co-exist in harmony while actually secretly plotting to turn all the mice of Green River into "mouse burgers" once they had outlived their usefulness to him in building a town in the Old West, and a giant mousetrap that he intended for killing them all. Like the villainous Warren T. Rat before him, Waul was defeated by an older Fievel, who teamed up with his old friend, Tiger, and the reluctant former Sheriff Wily Burp in order to stop his evil plan, and drive Waul and his band of outlaws out of town for good.
Waul is a polite, classy, and cultured gentleman by nature, yet underneath his civilized exterior lay a violent streak and the natural predatory instincts of a feline - he had a way with words and refrained from violence (unless it was in his favor), but would deal with any threats to his plans with ruthless efficiency. He held the law in little regard and saw himself as superior to almost everyone, making him rather arrogant as a result. He also has an extreme dislike of humans, especially those who treat him as a pet, such as his buxom owner.
Waul has a softer side to his nature, however, as he was genuinely fascinated with Tanya and her singing voice to the point of putting her on stage, despite the initial hostility of the other patrons over having a mouse performing. He also planned to spare Tanya the fate of the other mice.
Waul was served by a number of feline thugs who lacked his "level of sophistication", yet helped him in their own ways, such as when he ordered them to attack the mice sector of New York in order to drive the mice underground and- via the use of a puppet -trick them into buying tickets out West to a "safer world". He also had a henchman in the form of T.R. Chula, the tarantula, who had a sadistic streak even for a spider.
Waul's genius was shown in the way he designed a giant mouse-trap with the intent of gathering all the mice who had helped build the town onto it in the guise of a stage only to kill them; however, Fievel, Wylie Burp and Tiger showed up and foiled his evil plan. In the resulting battle, Cat R. Waul and his entire gang were catapulted (literally) out of the town via this mouse-trap device. Unfortunately, Waul is instantly spotted by a heavy-set, cat-fancying woman on a train (presumably his owner), who immediately grabs him and puts a bow on him promising to take care of him "for ever, and ever and ever!"
After his defeat, Waul would return as a recurring villain in the animated series Fievel's American Tails, which was a short-lived series based on the movie. In the show he's often scheming more ways to trick the mice of Green River into being eaten, but perhaps because most of his minions save Chula left him after his defeat, he is easily foiled. He actually comes very close to devouring the entire Mousekewitz family at the end of the episode "Little Mouse on the Prairie", only to be stopped by Sweet William's gang beating him up over being cheated in a gambling game.
- He bears a slight resemblance to Snidely Whiplash.
- Cat R. Waul: "Right, I want the subversive who attempted to assassinate me found."
- T.R. Chula: "I just love finding subversives! Hey, boss, what's a subversive?"
- Cat R. Waul: "Someone who doesn't have very long to live."
- Cat R Waul: "Okay chaps it's become necessary to put these dogs through obedience school."