Shadow Joker issues a phantom thief challenge to Joker! Unfortunately, Joker has caught a cold and can't really compete... but to keep Shadow from mocking him, he sends a remote controlled mini-Joker doll along with Hachi to take his place. Shadow is disappointed, but along with Rose, tries to go through with the competition anyway. The treasure they're after is the Jeweled Crocodile in the Kaneari Mansion, which is also the same place where Hachi and Joker first met!