Plasm Pikmin

Plasm Pikmin are a type of Pikmin composed entirely of plasm. They have no Onion of their own and are instead generated from blobs of plasm found in places such as caves. Plasm Pikmin are unique from other Pikmin in that they become weaker over time, gradually reducing their attack power and mobility. They eventually die once enough time has passed. New Plasm Pikmin can be generated from any plasm blob. Plasm Pikmin deaths do not count against total Pikmin deaths, making them useful for fighting enemies.

=In other games=

In Pikmin E
Blukmin are Pikmin that are composed of plasm. They are normally hostile but can be pacified by whistling them. They can also be defeated using Rock Pikmin.