Scooby-Doo! and the Monster of Mexico

Plot

Fred Jones gets a letter from his pen pal Alejo Otero, who invites the whole Mystery Inc. gang to visit him and his family in Veracruz, Mexico. The town is scared of a monster the locals call El Chupacabra. When they arrive, the gang stays at the Otero family's hotel, which is having a hard time keeping customers. They meet Alejo's wife Sofia, his son Jorge, his mother Doña Dolores, his brother Luis, and Luis's American fiancée Charlene.

During dinner, Diego Fuente shows up. He was a business partner of Alejo and Luis's late father and wants to buy the hotel, but the Oteros say no and send him away. Later, Alejo explains that El Chupacabra has been driving away potential guests.

The gang takes the case. Fred leads the search with the Otero brothers. Someone writes a warning in Spanish on the Mystery Machine, telling them to stop, but they keep going. Fred, Velma, Daphne, and the Otero brothers split up to look around, while Shaggy and Scooby stay with the van. Nobody knows that somebody has drained the brake fluid.

In the woods, Fred, Velma, and Daphne meet El Curandero, a medicine man, who tells them to look into history and warns they are in serious danger. Meanwhile, the Otero brothers get attacked by El Chupacabra. Even though the Mystery Machine has no brakes, Shaggy and Scooby drive it to reunite with the others and save them from the monster, then they all make it to a gas station.

After fixing the van, the group heads to a local history museum, thinking that is what El Curandero meant. There, a very hyper museum guide takes them to a show about old Mexican customs. During the performance, Daphne gets volunteered against her will and is kidnapped. The gang finds a secret passage and follows it to some Aztec pyramids, where they rescue Daphne.

But then tourists, led by an animatronic eagle, chase them for supposedly messing up the pyramids. Back in Veracruz, the gang reviews the clues. One big clue is that the Spanish warning had a grammar mistake that a real Spanish speaker would never make.