Ep. 23: Clemont investigates Ash and Greninja's mysterious battle synchronization with scientific analysis

23

Clemont seeks to understand the strange phenomenon occurring between Ash and Greninja during combat by employing scientific methods. He challenges Greninja to a match against his Luxray while Clembot Mini records data, yet no anomalies appear. Later, Alain and Charizard visit the Pokémon Center and eagerly accept a battle invitation. In the ensuing fight, Ash and Greninja achieve synchronization, triggering a powerful transformation. However, Ash experiences a frightening reaction that forces the match to end prematurely. Despite this unsettling outcome, Ash remains resolved to continue growing stronger alongside his partner Greninja.