Paras is very crablike, as it has six legs. The front two legs are very large, allowing Paras to grip on to prey and its environment. The most distinct feature are the two mushrooms on its back. It also has very large eyes on the top of its head.
Paras can have the ability Effect Spore or Dry Skin.
Effect Spore makes the foe paralyzed, asleep or poisoned 30% of the time whenever the foe hits Paras with a physical move. Dry Skin causes Paras to recover HP when it is raining and lose HP when it is sunny. The mushrooms on Paras' back have a mutualism with each other. The mushrooms get energy from Paras, while Paras gets to create spores.
Paras evolves into Parasect once it reaches level 24.
Paras is featured in The Problem with Paras under the ownership of Cassandra. It is extremely weak, but Cassandra needed it to evolve into a Parasect so she can use the giant mushroom to aid in her medical research. It does so towards the end of the episode.