S1·E21 Menace of the Manticore

When Mayor Jones buys online an ancient Persian temple, in order to boost business in Crystal Cove's amusement Park, "Creepy Spooky Terror Land", he never thought that that temple would come with a Manticore, a vicious mythological animal, who is been eating the park's visitors. Having no other option, he asks Fred and the gang to help him capture the beast, and while they do it, he does some snooping around, regarding the mysterious puzzle piece that the gang found in Darrow Mansion.