Pit

A pit is the name given to the depths down below where the level is on top of. These pits usually kill or harm creatures that fall into them, and for the most part, their bottom is unknown. In the Pikmin series, a pit's punishment on an entity or object that falls in depends on a variety of factors.

Most areas are considered to take place at ground-level, but some areas and caves clearly take place suspended above a seemingly endless abyss. There are borders almost everywhere stopping creatures from just walking off the edge and falling down, although some enemies can take steps large enough to walk over these boundaries, and leaders can throw Pikmin or their own partners over the boundaries.

Behavior
In general, pits are meant to kill whatever falls in, but for gameplay reasons or due to oversights, this may not always be the case.

Pikmin
Pikmin that fall into the abyss will be killed. Their death scream is long and high-pitched, clearly noting that they have been thrown into one.

Leaders
Leaders that touch the void are merely respawned back in a specific location, also taking damage depending on the game.

Enemies
In and, enemies that fall in a pit are killed right away. In enemies that fall off the edge are put back onto the ledge that they fell off of in a similar way to that of the leaders. The enemies, however, do not take any damage.

Other objects
Fruits, treasures, and other, minor objects that fall into the abyss will simply reappear at their original location.

=In fanon games=

In Pikmin: Louie's Adventure
Chasms are an obstacle in the game Pikmin: Louie's Adventure. Any Pikmin thrown down the chasms will die, much they do if they fall over the edge in a hole/dungeon.

A chasm appears as a rift that descends into blackness. Usually, the only way to cross is by bridge. Although the bridges can be on either side, they are commonly on the opposite side, where they can only be reached by Pink Pikmin

As of yet, Chasms are exclusive to Rocky Ravine.

Look for air currents. If they exist, throw Pink Pikmin and use to create a bridge on the other side.

Also, look down. Occasionly, ledges will exist allong the walls that allow downward descent. Only two currently exist, and both lead to holes. As only pikmin can get back up from ledges, albeit through throwing, the hole is the only chance of escaping. However, if the player waits until dark, the players and pikmin will automatically be transported back to the ship to end the day.

In Pikmin: Wide World
Pits appear in various locations in Pikmin: Wide World.