Episode 185
On thier way to the Battle Pyramid, Ash and friends meet a trainer who uses a Chatot for her pokémon comedy routine. She hopes to win an upcoming comedy showdown by using Chatot to imitate people and pokémon. Chatot gets away from its trainer and now Ash and the others have to find it, but Team Rocket is also after this pokémon.
Aired 20/07/2006EP 185 - Episode 185

Pokémon the Series: Ruby and Sapphire
After participating in the Johto League, Ash decides to begin anew in yet another journey; this time by himself and Pikachu, in the land of Hoenn. Though he isn't alone for long, as 10-year-old May (who dislikes Pokemon, but just wants to come along to see the world) travels with him after Pikachu destroys her bicycle. Ash also meets up with his old companion, Brock, and May's younger brother, Max. Together, they travel along in Hoenn, battling Gym Leaders, entering Contests, and other events on the way to the Hoenn League.
(Source: Anime News Network)