The Mushroom-Table Set is a furniture item in Nintendogs + Cats. It can be bought from Modo Home in all versions for $70 once it has been unlocked with 4,600 Owner Points or by playing 18 days. It can be placed in one of the four corners of your home, and cats will sit on it. The mushrooms are an obvious reference to the Super Mushroom and 1-Up Mushroom from the Mario series.
3DS (NTSC): "This mushroom-table set brings whimsy to any room."
3DS (PAL): "This mushroom table set brings an air of fun to any room."