Oddish resembles a plant bulb with round feet. Its body is blue in coloration, and it has beady red eyes. It has five green leaves sprouting from its head with the top of the center leaf bending backwards.
Oddish is able to restore health in moonlight. Its leaves are prehensile; that is, they can be used as limbs.
Oddish searches for fertile, nutrient-rich soil, then plants itself. During the daytime, while it is planted, its feet are thought to change shape and become similar to the roots of trees. Oddish grows by absorbing moonlight, and the more fertile the soil, the glossier its leaves become. As only its leaves are exposed above ground when it is buried into the soil, in order to avoid detection by enemies, it is said to look like a clump of weeds. It is also said to scream loudly if anyone tries to yank it out. Oddish is nocturnal, and awakes upon being exposed to moonlight. Upon awakening, it roams about actively, walking nearly 1000 feet and scattering its seeds.
Oddish live in grassy plains, and can also be found in tropical areas such as jungles and swamps, where the ground is rich in nutrients. They are very common, being native to Kanto and Johto.