Episode 165
Ash finally arrives at Battle Palace, ready to take on Spenser for the Spirit Symbol. As they head out to the battlefield Ash learns that he has the entire surronding Jungle to battle in! As the battle begins, May, Brock, and Max head up in a balloon with Scott to watch the battle. As the battle begins, Ash pits his newly "revived" Sceptile against Spenser's Shiftry and the battle quickly takes into the forest. Will Ash manages to be able to beat Spenser while battling in a forest? And does he have a secret weapon waiting in the wings?
Aired 16/02/2006EP 165 - Episode 165

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)