Azurill is a Pokémon owned by Rosa. It is her twenty second revealed Pokémon.
In The Pokémon Ranch, Kidd convinced Rosa to have a new Pokémon egg. Rosa let her Ditto breed with Wyatt's Azumarill, which had a Sea Incense.
In Ranch Hand, the egg hatched into Azurill. It played with Ditto as they rode in a car. It is one of the stolen Pokémon from Hayley's Ranch by Kidd. It is given to Lawrence's Collection via the Kodai Network.
In Collision with the Enemy, Azurill is freed from the collection and returned to Rosa.