Bellsprout

The official Pokedex database regarding this Pokemon contains the following: Appearances can be deceiving from this innocent-looking but carnivorous Pokemon that traps and eats bugs. Bellsprout uses its rooted feet to soak up needed moisture from the soil. In "Bulbasaur and the Hidden Village," Ash and Co. find a Bellsprout resting in the safe confines of the village where it can heal and grow.

First appearance: Episode 8—"Bulbasaur and the Hidden Village"