Mr. Smiley is one of the two main antagonists of Scooby-Doo! and the Monster of Mexico (the other being El Chupacabra).
He was voiced by the late Rip Taylor.
Mr. Smiley is a pudgy man with brown hair.
He decided to ruin the Otero business by scaring away all their customers by having his girlfriend, Charlene, dressed as El Chupacabra. He already had one of his theme parks in the U.S., but wanted to open up his "Mr. Smiley's Latin Adventure" theme park on the Oteros' property. He even made a fake ghost hologram of the late Señor Otero, lying to the people in the cemetery that were celebrating The Day Of The Dead, that if the Oteros sell their land, the curse of El Chupacabra will go away forever and that Charlene will be returned "unharmed."
Fred took a look at Luis' medallion that Charlene gave him, it was actually a tracking device. There was a red button on the back of the medallion. Fred pushes the button, making Scooby and Chiquita following the noise made by the tracking device. They stumble upon a nearby tomb, learning that a man in a skeleton costume is controlling the hologram of the late Señor Otero with some video game-like controls. Scooby and Chiquita began barking at the skeleton costumed man to get everyone's attention. The skeleton costumed man tells the two dogs to be quiet, but to no avail, as they continued barking at him. The Skeleton man is unmasked and reveals to be Mr. Smiley to be the mastermind. As Charlene is been unmasked by the Mystery Inc. and cruelly explains to Luis that she used him for his money, before she and Mr. Smiley begins to expresses their romantic feelings. Mr. Smiley then explains his plans to Luis and relentlessly teases Alejo about his late father, not before Diego Fuente arrives on the scene, explains to everyone about Mr. Smiley and Charlene's plans and rather than to harm them, he was actually trying to warn them after he learning from it and berates them for it.
He was soon being taken away by the Mexican Polices along with Charlene to prison for their crimes.