Episode 179
Ash and friends finally arrive at the Battle Pyramid. As they get close, they fall into some ancient ruins. After almost being crushed, they run into a guy named Brandon who owns a Regirock! Brandon acts as if they are in the wrong for being there and decides to take them out. Brandon tells them that these are the ruins of the Ancient Empire Pokélantis, and the legend of its King and the legendary Ho-Oh. When they find the throne room, Ash touches a sphere and he is possessed by the evil King himself. He then tries to steal everyone's pokémon! Brandon decides to stop him in a battle and save Ash. Will Brandon be able to win and set Ash free? Or will the King win and steal all the Pokémon?
Aired 25/05/2006EP 179 - Episode 179
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)