This game is packaged with a robotic dog, which the game can interact with the dog via beeps and barks. There is also an in-game 3D Wappy Dog, that doesn't require you turning on the robotic dog. You can play with the dog, feed it, customize it, and make it do tricks. There are mini games as well, which help you unlock options.
Wappy Dog was released in Japan as Heart Energy Poochi, extremely similar to the Poo-Chi dogs from 2000, both Poochi and Poo-Chi were handled by Sega Toys in Japan.