Onion

Sometimes it lies dormant, much like a bulb, but dig it up from the ground and provide it with the right stimulus—for example, a good, hard shake—and it will activate, sprouting three rootlike legs. It serves a role similar to a nest or an incubator for the Pikmin, absorbing pellets or the bodies of dead creatures for their nutritional value, and then propagating Pikmin the same color as itself. Onions also seem to greedily attempt to replicate certain characteristics of the matter that they absorb by combining with, or absorbing, other Onions, sometimes of the same type. It's been confirmed that just like Pikmin, an Onion has muscle fibers in its body, and though it is unable to walk, it is capable of a small range of motion. However, when one breaks down the biological matter it has absorbed, a fuel similar to bioethanol is created. Onions spray this fuel out of the mouths on their underbellies and are able to fly using their flowerlike propellers for stabilization.

If you look closely, you'll see its legs are sprouting a dense layer of hair.