Oddish and its evolutions Gloom and Vileplume first appeared in the first generation of Pokemon games. Oddish evolves into Gloom at Level 21, which can be turned into either Vileplume by being ...

Regional Pokemon variants, like Paldean Pidgey ... eventually evolving into a bug-like Gloom, and then to a third, unnamed form that resembled an Oddish being carried by a huge butterfly.