Episode 172
On the way to the Battle Pyramid, Ash and friends meet up with Solana, the Pokémon Ranger. She is there because of a geometric problem in the area that is disturbing electronics of all kinds including the Pokéballs. Everyone figures out that the disturbance is caused by a lonely Deoxys. When they go to investigate the place where Deoxys' meteor crashed, Deoxys becomes scared and flees with Max and Meowth.
Aired 13/04/2006EP 172 - Episode 172
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)