Usokkie

Usokkie has a brown, log-shaped body with yellow spots. It has short legs with toeless feet and thin forelegs with three green spheres at the ends. It has a forked "branch" on top of its head, which is shorter on the female than on the male. Despite its appearance, Usokkie's composition is closer to a rock than a plant.

Usokkie disguises itself as a tree and stands along paths to avoid being attacked. Its camouflage fails in the winter, as its forelegs remain green, unlike real trees. Usokkie is very weak to water and hates it, so whenever it starts to rain, it will break their disguise and flee to the nearest source of shelter. Because it holds its position for so long, its arms have become supple yet strong. It is popular with the elderly, with available magazines and fans devoted to its arm angle and length. Usokkie can be found living in forests.

(Source: Bulbapedia)