Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
A pet chameleon finds himself lost in the desert, takes on the name Rango and becomes sherrif. He is forced to confront the notorious gunfighter Rattlesnake Jake when he comes back to town. Rattlesnake Jake is a computer-animated Western Diamond-backed Rattlesnake with a bandoleer full of bullets wrapped around his body, a machine gun for a rattle (that makes nice metallic rattling sounds) and he has some pretty authentic looking scales and markings. He's supposed to be the scarey bad guy in the movie, and he is - when he first meets Rango, he fills a glass full of venom from one of his fangs to intimidate him.