Rico

Rico is a fake bounty hunter and the secondary antagonist of Disney's 2004 film Home on the Range. He was idolized as a hero by Buck, a horse who longed to fight by his side in capturing outlaws. However, near the end of the film, Rico was revealed to be in on Alameda Slim's scheme (as his partner), removing any evidence that may lead to the latter's capture, much to Buck's disappointment.

Personality
Rico is similar to Bill Sykes, only with a more mysterious and calmer tone, showing that he only wants and demands money without even thinking or considering the consequences after being beaten at the end of the film. It also shows he has a calm patience like Shere Khan, except for incompetence and to ones who take things less seriously.

Home on the Range
Rico is first seen riding into town on a horse. He silences a buzzing fly near him, to which the fly replies, "Sorry.". Buck notices Rico and gets distracted from playing tick-tack-toe with Rusty. Rico is a supposed bounty hunter who is Buck's idol, and whom Buck claims to be one of the best, although Rusty shows little interest and grows suspicious of Rico.

When Rico tells Sheriff Sam Brown that he needs a fresh horse to help him capture outlaw Alameda Slim, Buck shows off in front of them and Rusty. Rico eventually selects Buck, much to the horse's delight, and then saddles him up. Buck exclaims happily that he's wearing Rico's saddle, and the two ride off together. When they travel to a cattle drive, Buck encounters the farm cows who were on a journey to capture Slim as well. Buck gets into a brief argument with the bovines, while Rico ends up choosing another horse to assist him on his "mission," because from the way he saw Buck's exchange with the cows, he interpreted it as Buck being "skittish around cows."

Sometime later, Buck travels to Echo Mine alone and manages to trick the same horse from before into leaving his post so he could get back with Rico. However, when Buck gloats, he is overheard by Junior the Buffalo who snorts angrily behind him, as he had been blocking the mine's entrance when Buck made a vain attempt to get through earlier. After being chased around Echo Mine by Junior, Buck is soon saddled up by Rico, to which the horse happily gallops off with him.

When Slim reveals that Rico's actually a mercenary who's been working for him all along, Buck's left feeling betrayed and heartbroken. The horse then turns on his traitorous rider by flailing about wildly and manages to buck Rico off his saddle. When Rico attempts to shoot Buck afterwards, Mrs. Calloway and Maggie manage to take out the fake bounty hunter. Mrs. Calloway delivers a coup de grace by landing on top of Rico. Buck and the cows then lock Rico in a train cart along with the Willie Brothers and Mr. Wesley, who were also beaten up by them. He is presumably arrested afterwards when his betrayal is disclosed to Sheriff Sam Brown.

Trivia

 * He is slightly similar to Prince Charming from the Shrek series.  They seem to be heroes, but in truth, they are villainous subordinates to the big bads (Alameda Slim, Fairy Godmother)