Scooby-Doo! and the Monster of Mexico

Fred's pen-pal, Alejo Otero, who lives in Veracruz, Mexico, invites Fred and the rest of the gang to visit him and his family there. Mystery Inc. talk about it until they decide to go. However, after Alejo sent the invitation to Fred, a big long-haired monster started to terrorize the population of Veracruz. Alejo and his young son, Jorge, and their pet Chihuahua, Chiquita, see the monster, and the locals start calling him "El Chupacabra".

Later, when Mystery, Inc. arrives in Veracruz, they meet Alejo, who run a huge and fancy hotel, and he shows them around and where they will be staying. He then introduces his family, which includes his wife, Sofia, his mother, Doña Dolores, his brother Luis, and Luis's fiancée, Charlene, who is originally from the United States. While the gang and the Otero family enjoy a meal, Diego Fuente, a man who did business with Alejo and Luis’ late father, arrives to speak with the brothers about buying hotel, but they refuse. Fuente leaves, and the family go inside when a fierce storm arrives. When inside, Alejo's forced to tell the gang about El Chupacabra, and says that he does not have many other guests besides the gang because El Chupacabra has been scaring them away.

During the night, Shaggy and Scooby-Doo are scared when they think they hear a noise. They then hear a loud growl and run screaming out of their cottage. After seeing footprints outside of Shaggy and Scooby's window, Fred declares that there is a mystery they have to solve. The next day, the gang and the Otero brothers set out to search for El Chupacabra. Daphne interviews the townspeople, but none of them are able to find El Chupacabra. When they get back to the Mystery Machine, they find someone has written a threat written in Spanish on it, warning them to get out of solving the mystery. The gang realizes this is serious and decide to search at night. Fred, Velma and Daphne go one way, Alejo and Luis go another way, and Shaggy and Scooby stay at the Mystery Machine.

At night, Shaggy and Scooby sleep in the van, while someone drains their brake fluid. Fred, Velma and Daphne search the woods, and find El Curandero, a medicine man. El Curandero tells them they need to look at history and that they are in grave danger. Meanwhile, Alejo and Luis are searching when Alejo sees El Chupacabra. Alejo is chased and nearly falls off a cliff. He calls for Luis, but there is no answer. El Chupacabra disappears, and Luis shows up, saying he was knocked on the head by El Chupacabra.

Shaggy and Scooby start driving, but then realize they cannot stop due to the brake fluid tank being tampered with. They meet up with Fred, Velma, Daphne, Alejo and Luis, who were being chased by El Chupacabra. Eventually, the Mystery Machine runs out of gas and stops right in front of a gas station, where they got it fixed. The gang drives along and finds a sign to a history museum, and thinking that is what the medicine man said, go to it. When they get there, they meet a suspicious and hyper museum guide who leads them into an auditorium. There they see a performance about ancient Mexican customs. The guide then makes Daphne volunteer, and she kidnaps her. The rest of the gang find a secret passageway and follow it, until they come to Aztec pyramids. They find Daphne at the top of one and rescue her, but the tourists chase after them, after they are accused of destroying a statue. After a long chase scene and fights against giant living statues, they finally return to Veracruz.

The next day is the Day of the Dead, and all go to the cemetery, where Dolores informs them that Charlene has been captured by El Chupacabra. The family gives offerings to the grave of Señor Otero and hope Charlene can be found. Suddenly, the ghost of Señor Otero comes out of his grave and tells them to sell the hotel and the land or they will be in danger, but Alejo believes someone is playing a trick. At the same time, Fred just revealed the good luck charm Charlene gave to Luis has is really a tracking device instead of an ancient medallion. Scooby and Chiquita follows a beeping noise that is activated by pushing the button from the tracking device until they find a man in a skeleton suit controlling the ghost. The gang catches him, and he is revealed to be theme park owner Mr. Smiley. They deduce that he started the Chupacabra scheme so he could force the locals to sell their land and allow him to build his theme park. Him kidnapping Daphne and framing the gang as vandals was his way of creating bad publicity for the pyramids, his sole competitor for the thousands of tourist dollars. As they are about to close the mystery, El Chupacabra appears and scares everyone.

After chasing the gang, El Chupacabra is caught up in some wiring. As they all gather around El Chupacabra, the culprit is revealed to be the museum guide when she climbs out of the suit. She tells them she was an actor who worked at Mr. Smiley's theme park where they met and fell in love and that they were going to get all the land. Luis asks what happened to Charlene, and the guide tells him he will never see her again and he should forget about her. Suddenly, the Oteros reveal that the offerings they left for Señor Otero have disappeared, all except for the one from Charlene. Velma then guesses something is up and realizes the guide is actually Charlene, whose identity is given away by randomly tossing coffee beans, a trait she adopted from working in the hotel cafe all day. Charlene revealed that she, knowing Smiley's Chupacabra scam would not scare them off, intended to scam the Oteros out of their land once she married Luis. Señor Fuente then comes in and explains that he learned of Mr. Smiley and Charlene's plans and wanted to warn the Oteros and Mystery Inc. of what was really going on. In the end, Mr. Smiley and Charlene went to jail and everybody else enjoys the Day of the Dead festivities.

• Frank Welker as Scooby-Doo, Fred Jones, El Chupacabra
• Casey Kasem as Shaggy Rogers
• Heather North as Daphne Blake (in her final film role before retirement and death)
• Nicole Jaffe as Velma Dinkley
• Eddie Santiago as Alejo Otero
• Jesse Borrego as Luis Otero
• Candi Milo as Charlene/Museum Guide
• Rita Moreno as Doña Dolores
• Maria Canals as Sofia Otero / Old Woman
• Brandon Gonzalez as Jorge Otero
• Rip Taylor as Mr. Smiley / Ghost of Señor Otero
• Cástulo Guerra as Señor Fuente
• Benito Martinez as El Curandero

The film was released on DVD and VHS on September 30, 2003 by Warner Home Video.

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• Scooby-Doo! and the Monster of Mexico at IMDb
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