Hoppip

Hoppip (Japanese: ハネッコ Hanecco) is one of the types of Pokémon species and known as the cotton weed Pokémon. They are Grass/Flying type and evolve into Skiploom starting at level 18, who evolves into Jumpluff starting at level 27. The Crystal Pokédex says of Hoppip: It can be carried away on even the gentlest breeze. It may even float all the way to the next town.

In the anime
Hoppip first appeared in Foul Weather Friends (EP137), where trainer Mariah used them to predict the weather.