Koopook can only been seen after his trouble has been taken on. He challenges anyone to try and find him somewhere in Hooktail Castle. Koopook can be found in the room with the large green block behind a cage with a Life Shroom near it. After Koopook as been found by Mario, he will award him with a Special Card that can be used at the Pianta Parlor in Rogueport. Koopook later sends an e-mail to Mario telling him to find him at Goomstar Temple. However, this location is not accessible in Paper Mario: The Thousand-Year Door meaning it's impossible to find Koopook again.