Cameos
Items
A number of the toys and accessories you can buy are based on other Nintendo games:
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Mario Karts
Each copy of Nintendogs has a different remote control Mario Kart toy you can buy for $100. Dachsund & Friends has Mario, Chihuahua & Friends has Bowser, and Shiba/Lab & Friends has Peach.
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Retro Block
The ? Block and Rubber Mushroom are based on sprites from Super Mario Bros.
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Mario Bros. Hat
The Red Hat and Green Hat accessories are Mario and Luigi's hats from the Mario series.
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Mario Music Box
One of the Music items you can get in the Chihuahua version only is the Mario Music Box. This plays the Super Mario Bros. theme tune.
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Frisbee
The Frisbees have the Nintendo logo on them.
Bulborb in the Shop
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When you visit the secondhand shop, you can see the layout of the shop on the top screen. On the right hand side is a stuffed red Bulborb from the Pikmin series. You can make it out in some of the other shop scenes as well.
Shiggy & Pik
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When walking your dog, one of the random dog-walkers you bump into is named "Shiggy" and his dog is named "Pik". This is based on Nintendo game designer Shigeru Miyamoto, and his real-life dog, who is also named Pik.
