Mock Bottom

The Mock Bottom is a fruit in Pikmin 3 and a treasure in. It is a. In Pikmin 3, there is only one in Story Mode, in the Tropical Wilds, and requires Blue Pikmin or Winged Pikmin to obtain. In Pikmin 4, two exist, one in the Serene Shores and another in the Primordial Thicket.

Collecting the fruit
The Mock Bottom is found on top of a waterfall in the Tropical Wilds. To get this, you will need either Blue Pikmin or Winged Pikmin. With Blue Pikmin, order the Pikmin to build the climbing stick. Once it is complete, they will automatically pick up the fruit, which only requires 10 Pikmin to carry. Do note that if Blue Pikmin are used, they will carry it through the small pond in which many Puckering Blinnows reside. Take them out before collecting the fruit.

If you choose to use Winged Pikmin instead, they must not build the climbing stick. If they climb it, and are unsupervised, they will fall into the water and drown. As such, it is easier to lock-on to the object from nearby, and order the Winged Pikmin to collect it. It may be a bit hard to reach, but it is still possible.

Serene Shores
There is a Mock Bottom inside of a plastic pail near the center of the overworld, to the east of the sand castle's entrance. It is partially submerged underwater at high tide, and completely exposed at low tide. It is guarded by two Skeeterskates and a Pricklepuff, which should be defeated before attempting to collect this treasure. To collect this treasure, you must throw 12 Blue Pikmin or Winged Pikmin at it during high tide, or 12 Pikmin at it during low tide.

Primordial Thicket
There is a Mock Bottom stuck inside of a toxic sticky mold near the bottom right of the overworld. To collect this treasure, you must first use White Pikmin or a poison-resistant Oatchi to destroy the mushrooms to remove the mold; then, throw 12 Pikmin at it.

Trivia

 * In the Japanese and French versions of Brittany's notes on the Mock Bottom, Brittany compares the fruit to Captain Charlie's bottom.