I've heard quite favorable reviews of Dinkie pets and would recommend that if you wish to seek one out try looking for a Yuki Penguin. The Dinkie Dino has been counterfeited allot but I have yet to hear of a knock-off Yuki Penguin. As for Gyaoppis, they seem to be also well liked but I've heard more people get enthusiastic about the Dinkie pets. Aside from video reviews, all I can really direct you to is Tamenagerie, a great reference website for the multitudes of virtual pets. You can find the instructions for Dinkies and Gyaoppis here and a general page on Gyaoppis here.