Ep. 23: Ash faces Cameron's Hydreigon in the fourth round match
Aired on December 20, 2012

23
During the fourth round of the tournament, Ash engages in a battle against the trainer Cameron. At the start of this specific match, Cameron introduces his secret weapon, which is the Pokémon Hydreigon. The encounter focuses on the initial exchange between Ash and Cameron as the latter reveals this powerful creature to begin their competitive fight.
Episodes
- Ep. 19 · The Unova League commences with Ash facing Trip in the preliminary matches
- Ep. 20 · Ash and Trip battle while Bianca fights Cameron in the preliminaries
- Ep. 21 · Iris's Axew becomes separated in Vertress City during a competition break.
- Ep. 22 · Ash Faces Stephan in the Third Round of Unova League Battles
- Ep. 23 · Ash faces Cameron's Hydreigon in the fourth round match
- Ep. 24 · Ash's Snivy and Pikachu confront Cameron and his evolved Lucario in a Unova League battle