There is no mention or evidence in any pont of the film that suggests that the city Edmond, Patou, Snipes and Peepers go to is Las Vegas.  *(Edmond teams up with Patou, the magpie Snipes (Eddie Deezen), and the mouse Peepers (Sandy Duncan) and they make their way to Las Vegas, where they hope to find Chanticleer)*   

 Nor is there any mention of Chanticleer being an "Elvis Impersonator", he is simply called "The King".