Ep. 274: Ash loses to Harrison while Gary announces his retirement from battling to become a researcher.
Aired on October 31, 2002

274
Harrison defeats Ash in the quarter-finals of the Silver Conference. Following his own semi-final loss, Harrison shares details about the Hoenn region and its Pokémon with Ash. As the tournament concludes, the group prepares to depart for Vermillion City. During this time, Gary reveals a significant life change: he is retiring from competitive battling. He decides to pursue a career as a Pokémon Researcher, following in the footsteps of his grandfather, Professor Oak. This announcement marks a major shift in Gary's path as the journey continues.
Episodes
- Ep. 270 · Ash advances to the Championship Round after defeating Jackson in a draw
- Ep. 271 · Ash faces rival Gary Oak in a critical battle requiring careful team selection
- Ep. 272 · Ash secures a major victory over Gary before facing new rival Harrison in his next match
- Ep. 273 · Ash battles Harrison in the Silver Conference quarter finals with Blaziken versus Charizard
- Ep. 274 · Ash loses to Harrison while Gary announces his retirement from battling to become a researcher.
- Ep. 275 · Ash bids farewell to Brock and Misty before departing for Hoenn
- Ep. 276 · Ash heads to Hoenn alone with Pikachu after leaving friends and other Pokemon behind