Episode 161
Ash and friends finally arrive in Wisteria Town where May prepares for her next contest. Harley shows up and this time, he's not so friendly! He declares that he will win this contest and his Fourth Ribbon. Team Rocket tries to convince Harley to work with them to help beat May and get Pikachu but he just calls them losers and leaves. In the contest, both May and Harley manage to breeze through the appeals and battles and end up facing each other, Munchlax to Octillery. Meanwhile, Team Rocket decides to get revenge on Harley.
Aired 19/01/2006EP 161 - Episode 161
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)