The Trip to El Dorado:

The Trip to El Dorado is the fifteenth episode of Scooby Doo R.P.M.

Plot
The Mystery Hunters lead Mystery Inc., Fossil 5, the Sea-Hounders, the Fuji-Finders, the Mystery-Society, and the Mystery-Sleuths to El Dorado..... a lost world where Mayans dwell. But trouble comes in the form of a ghostly priest named Meccoz who seeks to return the land to the old times of human-sacrifices.

Quotes

 * Shaggy: Great Quetzal Pretzels. Say. It rhymes.
 * Shaggy: Nice kitty.

(the stone jaguar roars)

Scooby Doo: RELP!

Trivia

 * This episode is a parody on the Dreamworks movie The Road to El Dorado. There are other nods... such as the dark priest obsessed with holy sacrifices, the stone jaguar coming to life, and the ball-game.