Episode 192
On their way back to Pallet Town, Ash and May compete in a Pokémon Contest. During the break, May's Combusken evolves into Blaziken! In the final round, Ash pits Sceptile against May's Blaziken! jap title: Ash VS May! The Last Battle!!
Aired 07/09/2006EP 192 - Episode 192

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)