The Mario Theme is collection of Super Mario-inspired furniture in the Animal Crossing series that first appeared in Animal Crossing. The items from the series are obtained through non-standard means which change between games, and none of the items can be reordered from the catalog.
Prior to Animal Crossing: New Leaf, the items are styled after their appearance in Super Mario Bros., and in New Leaf they are styled after their more modern appearances. All pieces of the Mario Theme sell for 256 Bells, referencing the 256 values in 8-bit binary, zero through 255. The Mario Theme has 10 or 12 furniture pieces depending on the game, with four more items added to the original set in Wild World.
In Animal Crossing
In Wild World
In Animal Crossing: Wild World, items from the Mario Theme could be obtained from DS Download Stations. Additionally, some of the items were distributed via the Nintendo Wi-Fi Connection. The items from the Mario Theme do not appear in the catalog.
In City Folk
In New Leaf
The complete Mario Theme as it appears in City Folk. The items shown are, starting from the left: Green Pipe, ? Block, Brick Block, 1-Up Mushroom, Starman, Super Mushroom, Fire Flower, Koopa Shell, Coin, Fire Bar, Cannon, Flagpole (in both up and down state) (Mushroom Mural and Block Floor also shown).
A room with Mario themed furniture in Animal Crossing: City Folk