Shaggy's uncle disappears and leaves Shaggy with a billion dollars, so Shaggy...
Shaggy & Scooby-Doo Get a Clue!
Season 1 Episode 7: Don't Feed the Animals
When Scooby and Shaggy learn that Dr. Phibes is planning to mow down the rain forest to harvest a plant that he believes will make him immortal, the two travel across the world to save the planet.