Fool's Gold

Summary
A species of goat-like aliens comes to Earth for a Popcorn Festival in Walton. These aliens feed on popcorn and produce solid gold poop, which keeps the town running. Ben, Gwen, and Kevin are called in by one of the aliens named Orb, who has lost track of his friend, Decka. Mayor Coleman has kidnapped Decka in hopes of having a constant supply of gold, but when he feeds the alien meat, he morphs into a primal form that will multiply uncontrollably if it absorbs enough energy (their species is apparently responsible for Mars being a wasteland). After being told that the species cannot digest silicon, Ben feeds Decka an army of Echo Echos, causing him to vomit up everything he ate and return to normal. He and Orb then leave in their ships, with Decka stating that he will tell everyone and they will never come back. Before Mayor Coleman is brought to justice, Kevin gives Gwen a locket with a picture of her and him before the accident to remember him as he was.

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Kevin Levin
 * Mayor Coleman
 * Deka
 * Orb

Aliens used

 * Spidermonkey
 * Goop
 * Big Chill
 * Echo Echo