In the building after the puzzle
After you chase the thief on the scooters, you will get the key to the cottage in the Country Side from Early Poptropica island. There you will find the missing painting and enter the lair of the Black Widow.
The Black Widow is behind the theft, and after you chase the thief on the scooters, you will receive a package that leads you to her. (You will get the sought after key to the cottage in the Country Side.)
Counterfeit IslandNo, Counterfeit Island is real. In fact, it'd be better named as "Art Island".
After you identify the painting thief from the security videos, and find him Downtown, you will chase him on the scooters. After this, you get a package at the museum that will take you to Early Poptropica Island, where you will get the key that fits the cottage door.
He goes to the scooters for the chase, and escapes on a boat. You do get the key card he dropped. Return to the museum where a package is waiting, with a message that will take you off the island, briefly.
there is no mansion on counterfeit island
You do not die on Counterfeit Island.
The key is nowhere on Counterfeit Island. You must complete the museum, and track down the thief, and after a scooter chase you will get it from Early Poptropica Island.When you chase the thief on motor scooters, he gets away. But at the museum you receive a package that takes you off the island, where you receive a myserious key. The key opens the Inspector's house in the Countryside.
There is no camera as an item on Counterfeit Island.
After you chase the thief on the scooters, you can go to Early Poptropica, where the Curator will meet you in the Pop Art museum to give you the key. (You get a package at the museum with this message.)
After you use the timecard (from the Clown Store) and get a photo of the thief, you will chase him on the scooters from the Jazz Club. But you will lose him and go to Early Poptropica Island to see the curator there, and then recover the painting with the key to the Inspector's house.
You will have to swim for it : the lighthouse is on Big Nate Island, not Counterfeit Island.