Nasty Jack is Ryan and Pooh's old enemy from The New Adventures of Winnie the Pooh episode, Paw and Order. He worked with Cat R. Waul to get revenge on Ryan Pooh and the characters in Kids World's Adventures of An American Tail: Fievel Goes West. However, by the end of the film, he becomes sheriff of Green River at the suggestion of Wylie Burp. He returned in Kids World's Adventures of The Good, The Bad, and the Huckleberry Hound where he worked for the Dalton Gang and at the end of that film, he returns to Green River to be sheriff again at the suggestion of Piglet. He will return in Ryan Mitchell (Foster) & The Gang Goes Back to the Future Part III where he'll not only team up with Cat R. Waul again, but also team up with Jessie, James, and Meowth of Team Rocket and Alameda Slim to work for Buford "Mad Dog" Tannen. After Marty defeats Mad Dog, he becomes Sheriff of Hill Valley of the year 1885, at the request of Marty.