Cactus

The Cactus is a species of cactus that grows in arid environments such as deserts and is covered in needles that skewer most Pikmin upon contact.

=In fanon games=

In Pikmin Adventure (Neini version)
Cacti appear in Pikmin Adventure. They are roughly Blue's size, and deal some damage to him upon contact.

In Pikmin: Shadows of the Future
In Pikmin: Shadows of the Future, Cacti appear in Boulder Canyon and act as they do in Pikspore.

In Pikspore
Cacti appear in Pikspore, specifically in the Great Desert and Bonus Bash. They are large, round, spiky plants that are just slightly smaller than a Red Bulborb, and come in both green and brown colors. If a captain runs into it, it'll deal some damage to them. Pikmin that touch one will be depetaled and run around in a panic. If a Pikmin at leaf-stage maturity touches a cactus, it will die.