The Nintendo Wii console brought with it a really fun feature: Miis, which are digital representations of yourself. When "Wii Fit Plus" came out, it allowed players to go one step further, and add little Mii characters for their pets. This not only lets owners track the weight of their pets, but also go for jogs with their pets around the island, and play the various mini-games with the pets as well.
Power on the Wii console, then insert and run the Wii Fit Plus disc. Connect the Wii Balance Board to the console by pressing the toe button when prompted.
Select your Mii. If this is your first time playing, you must select the Mii from your Mii plaza. If you've played before, select the Mii you are already using.
Find the "Register Pet" button. It has a picture of an animal with a plus sign next to it.
Use the on-screen keyboard to type in your pet's name.
Follow the on-screen prompts to create your pet's Mii. You'll start by choosing the species, from dog or cat. Next, you can choose the colouring and size of your pet.
Click the "Done" button. You will now be prompted to pick up your pet and weigh him. If you select the "Body Test" option, you'll be able to find out how much your pet weighs.