The Mushroom Series of furniture is a special series of furniture, available at only certain events, including Mushrooming Season and the Acorn Festival. It is available in Animal Crossing: Wild World, Animal Crossing: City Folk and Animal Crossing: New Leaf.
Animal Crossing: Wild WorldEdit
In Wild World, Mushroom Series items can be obtained from Cornimer during the Acorn Festival in exchange for acorns.
Animal Crossing: City FolkEdit
In City Folk, items in the Mushroom Series can be obtained during the month of November, where they will be disguised as mushrooms on the ground. Each day, there will be six mushrooms in the town. The mushrooms will be immediately next to a tree (Rare Mushrooms must be dug up out of the ground). One of them will be an item from the Mushroom Series. The other mushrooms can be sold to Tom Nook or eaten by the player or Wendell. On November 1st the Mush Hanger was distributed as DLC. Although related, it is not part of the main series.
Animal Crossing: New LeafEdit
In New Leaf, the Mushroom Series is identical as in City Folk; the only difference is that five instead of six mushrooms appear throughout November, and the mush hanger is found the same way as the other items other than downloadable content.