Pokémon : S19 | E44 – Battling with a Clean Slate!

As Lumiose City repairs the extensive damages caused by Team Flare, Clemont successfully repairs Clembot. However, due to Clembot's memory core being destroyed it has no memory of its past, and consequently it has no experience. Meanwhile, a returning Pokémon trainer asks for a rematch with Clembot. Ash decides to return to Kanto to start from scratch once again, leaving Alain and Serena in doubt about their futures, but after a heart-to-heart talk with Ash, Alain decides to return to work as Sycamore's field assistant. (Source: Wikipedia)