Rocks are objects that have appeared in every Animal Crossing series game. There are usually five to ten rocks in a player's town, and the rocks can be a single rock or be in clumps of two. Depending on the season, hitting a rock with a Shovel or Axe may result in a Pill Bug, Centipede or House Centipede appearing; this is the only way of finding them. In winter, rocks can have snow on top, though the mechanics of rocks do not change; this does not apply to New Horizons.
Prior to New Leaf
In Animal Crossing, Animal Crossing: Wild World, and Animal Crossing: City Folk, players can find a money rock around their town, which will produce Bells when hit with a shovel or an axe. The player can hit the rock for eight times before the rock can no longer produce Bells. In Animal Crossing, the rock will release up to 23,300 Bells as three sacks of 100, three sacks of 1,000, and two sacks of 10,000; in Animal Crossing: Wild World, the rock will release up to 8,500 Bells as sacks of 100, 200, 400, 800, 1,000, 2,000, 4,000; and in Animal Crossing: City Folk onwards, the rock will spurt out up to 16,100 Bells as sacks of 100, 200, 300, 500, 1,000, 2,000, 4,000, and finally 8,000.
In New Leaf
In Animal Crossing: New Leaf, if the player is wearing the Daily Lucky Item on a good money luck day, the money rock will release more Bells with each sack containing twice as many Bells as normal. Conversely, if the player is not wearing the Daily Lucky Item on a bad money luck day, the money rock will release less Bells with an extra 100 sack at the start that causes the last 8,000 Bell sack to not spawn. In the Welcome amiibo update, the player can also sit on rocks. This is the only time when sitting on rocks is possible.
In addition to money rocks, players are able to destroy "fake" rocks to produce ores. These can be given to Cyrus at Re-Tail to customize furniture in different colors. If the player strikes a money rock with a Silver Shovel, it may produce ores instead of Bells.
In New Horizons
In Animal Crossing: New Horizons, a total of six rocks appear on the player's island, and all rocks except the money rock now release Stone, Clay, Iron Nugget, and Gold Nugget when hit, which can be used in various DIY recipes. Similar to Money Rocks, they must be hit consecutively in order for a maximum of eight items to be released. During Bunny Day, Stone Eggs can also be produced.
Additionally, rocks can be broken when hit with an Axe or Shovel if the player has enough stamina (after eating edible items such as fruits, mushrooms, or turnips), after which they'll produce a Stone and will reappear in a random location the following day. However, a rock cannot spawn close to a natural barrier (beach, water, cliffs), furniture, shrubs, fences, dropped items, flowers, or a placed custom design. Tall structures like buildings or trees can also prevent a rock from spawning. Multiple rocks can be broken in a single day, but only one rock will respawn the following morning until there are six rocks on the island.